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Chemistry of Concrete - Periodic Table of Videos

Video vocabulary

jelly

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US / ˈdʒeli /

UK / ˈdʒɛli /

B2
  • adjecitve
  • Being soft and without form
  • noun
  • Semisolid food substance, eaten as dessert
  • Sweet food made from fruit and spread on bread

just

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US / dʒʌst /

UK / dʒʌst /

A1
  • adjecitve
  • Proper or appropriate; as is deserved
  • Doing or being what is right or fair
  • Legally correct; having enough evidence
  • adverb
  • Almost; nearly
  • Exactly at the time of
  • Exactly (the same as, like)

load

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US / ləʊd /

UK / lod /

A2
  • noun
  • Large, often heavy, amount of a thing to be moved
  • A burden; heavy responsibility
  • Many or much of something; a lot of
  • Items that fill a truck, machine
  • verb
  • To put in items for use (e.g. bullets in a gun)

purpose

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US / 'pɜ:pəs /

UK / ˈpɚpəs /

A2
  • noun
  • Reason for which something is done; aim; goal

somewhere

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US / 'sʌmweə(r) /

UK / ˈsʌmˌhwɛr, -ˌwɛr /

A1
  • adverb
  • At or to an unknown or unnamed place

talk

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US / tɔ:k /

UK / tɔk /

A1
  • noun
  • Style of speaking
  • Discussion between two countries
  • Giving information in front of people; lecture
  • Saying things or ideas to someone with words
  • verb
  • To make a formal speech about something
  • To say things or ideas to someone with words

tension

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US / 'tenʃn /

UK / ˈtɛnʃən /

A2
  • noun
  • Feeling of anxiety and inability to relax
  • Degree to which something is stretched tight

difference

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US / 'dɪfrəns /

UK / ˈdɪfərəns, ˈdɪfrəns /

A1
  • noun
  • A thing or issue that people do not agree about
  • Not of the same kind; unlike other things

head

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US / hed /

UK / hɛd /

A1
  • noun
  • Counter for the number of cattle
  • Natural mental ability or intelligence
  • Leader or person with the greatest authority
  • Mind; mental ability; mental state
  • Side of a coin with a head on it
  • Top part of your body with eyes and a mouth
  • Starting point of something, e.g. a river
  • verb
  • To hit a ball with your head in a game
  • To be first or at the front or top (e.g. a list)
  • To travel or move toward a particular place; To go in a particular direction
  • To become the leader of something
  • To lead or be responsible for something

ici

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US / /

UK / /

A1
  • abbreviation
  • Imperial Chemical Industries (Limited).

never

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US / 'nevə(r) /

UK / ˈnɛvɚ /

A1
  • adverb
  • Not ever; not at any time

special

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US / 'speʃl /

UK / ˈspɛʃəl /

A1
  • adjecitve
  • Being additional or extra
  • Different, better or greater than normal
  • noun
  • Heavily discounted sales item

for

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US / fə(r) /

UK / fɔr,fə /

A1
  • preposition
  • Used to show the purpose, or need of something

melt

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US / melt /

UK / mɛlt /

B1
  • verb
  • To disappear or to go away
  • To make, become soft or liquid due to heat
  • To become liquid through heating

solid

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US / 'sɒlɪd /

UK / ˈsɑlɪd /

A2
  • adjecitve
  • Being able to be trusted; reliable
  • Substance that is hard or of fixed shape
  • Being well made and expected to last long
  • Having no space or emptiness inside
  • Being made entirely of one material or substance
  • noun
  • Something firm or hard; not gas or liquid

die

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US / daɪ /

UK / daɪ /

A1
  • noun
  • Cube with dots numbering 1-6 on it used in games
  • verb
  • To cease to function or work
  • (Of a thing) to stop being used or done
  • (Of a person) to stop living

dam

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US / dæm /

UK / dæm /

B1
  • noun
  • Wall built to stop the flow of water
  • verb
  • To build a wall to prevent a river from flowing

lecture

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US / 'lektʃə(r) /

UK / ˈlɛktʃɚ /

A2
  • noun
  • Telling someone off for doing something wrong
  • Talk or speech about a particular subject
  • verb
  • To speak to someone to show anger or warn them
  • To give a talk or speech about a subject

nuclear

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US / ˈnju:kliə(r) /

UK / ˈnukliɚ, ˈnju- /

A2
  • adjecitve
  • Concerning or involving the center of an atom

lunch

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US / lʌntʃ /

UK / lʌntʃ /

A1
  • noun
  • Light meal eaten in the middle of the day
  • verb
  • To eat a meal during the middle of the day

soil

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US / sɔɪl /

UK / sɔɪl /

B1
  • noun
  • Conditions in which something develops
  • Mix of natural material in which plants grow
  • Land of a certain country
  • verb
  • To get or become dirty

set

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US / set /

UK / sɛt /

A1
  • adjecitve
  • Prepared for something; ready
  • noun
  • Complete group of something
  • Place where a television show or movie is filmed
  • Group of games in a tennis match
  • Device that receives radio or television signals
  • verb
  • To make a clock state or ring at a particular time
  • To decide upon or choose something
  • To make something ready for use (e.g. table)
  • To decide on a price for something
  • To become hard (of glue, concrete etc.)
  • To be located in a specific place or time
  • To put (e.g. a vase) down carefully in a place
  • To put someone in a certain condition or state
  • (Of the sun) to go lower than the horizon

start

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US / stɑ:t /

UK / stɑrt /

A1
  • noun
  • First time or place that a thing exists; beginning
  • First opportunity to achieve something, e.g. a job
  • Sudden action or movement because you are scared
  • other
  • Beginning of something in place or time
  • verb
  • To do, be or happen for the first time; begin
  • To turn something on

piece

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US / pi:s /

UK / pis /

A1
  • noun
  • A counter in a board game
  • Small part of something larger
  • verb
  • To put items together to assemble something

well

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US / wel /

UK / wɛl /

A1
  • adjecitve
  • Being in a fortunate, good condition or state
  • Healthy and in good condition
  • adverb
  • In an acceptable, proper, or successful manner
  • In a complete, total, or full manner
  • A great and considerable degree
  • In a successful way, in a good or satisfactory way
  • exclamation
  • Used to begin or continue a particular statement
  • Used to show you want to start saying something
  • Used to express that you are waiting for a reply
  • You say this to change the topic of a conversation
  • Used to indicate you are making a final remark
  • noun
  • Long deep hole in the ground to get water
  • verb
  • To cause your eyes to fill with tears

afterwards

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US / 'ɑ:ftəwədz /

UK / 'æftərwərdz /

A2
  • adverb
  • At a time after something else already mentioned

soon

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US / su:n /

UK / sun /

A1
  • adverb
  • At a time not long from now

warm

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US / wɔ:m /

UK / wɔrm /

A1
  • adjecitve
  • Friendly, sincere and kind to others
  • Being friendly or sincere
  • Slightly hot; not very hot
  • verb
  • To become more friendly or to like something
  • To make something hotter

water

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US / 'wɔ:tə(r) /

UK / ˈwɔtɚ, ˈwɑtɚ /

A1
  • noun
  • Clear liquid that forms the seas, rivers and rain
  • Large area such as an ocean or sea
  • verb
  • (Of the eyes) to produce tears
  • (Mouth) to become wet at the thought of nice food
  • To pour liquids onto a plant to keep it alive

hour

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US / 'aʊə(r) /

UK / aʊr /

A1
  • noun
  • 60 minutes
  • Particular time of the day
  • Fixed, regularly occurring time

possibly

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US / ˈpɒsəbli /

UK / ˈpɑ:səbli /

A1
  • adverb
  • May be true or likely, but is uncertain

steel

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US / sti:l /

UK / stil /

A2
  • adjecitve
  • Made of, or partly made of, a strong silvery metal
  • noun
  • Very strong or determined character in a person
  • Very strong metal made of iron, etc.
  • verb
  • To prepare yourself for something difficult

cement

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US / sɪ'ment /

UK / sɪˈmɛnt /

B1
  • noun
  • Building material made from gray powder, water
  • verb
  • To bind or hold together strongly
  • To make something more stable or stronger

depend

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US / dɪˈpend /

UK / dɪˈpend /

B1
  • verb
  • Be controlled or determined by (someone/something)

green

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US / gri:n /

UK / ɡrin /

A1
  • adjecitve
  • Color of young leaves
  • Covered with vegetation, e.g. grass
  • Concerned about protecting the environment
  • The color of young leaves
  • Lacking in experience/knowledge due to being young
  • Being not fully grown or ripe, as in fruit
  • noun
  • Large grassy area
  • used as a part of a name of a place (UK)

generate

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US / ˈdʒenəreɪt /

UK / ˈdʒɛnəˌret /

A2
  • verb
  • To create or be produced or bring into existence
  • To create electricity, heat, energy and power

martin

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US / ˈmɑ:tn /

UK / ˈmɑrtn: /

A1
  • other
  • Any of various swallows with squarish or slightly forked tail and long pointed wings; migrate around

bubble

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US / ˈbʌbl /

UK / ˈbʌbəl /

B1
  • noun
  • A small ball of air inside of a liquid
  • verb
  • (Of a liquid) to produce bubbles, as when boiling
  • To show intense emotion, e.g. excitement, anger

few

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US / fju: /

UK / fju /

A1
  • pronoun
  • Not many, a small number

much

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US / mʌtʃ /

UK / mʌtʃ /

A1
  • adjecitve
  • Very; to a high level or degree
  • adverb
  • A lot; large amount; a high degree of
  • Nearly; basically
  • On many occasions; often
  • noun
  • A large amount; a great quantity

strong

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US / strɒŋ /

UK / strɔŋ /

A1
  • adjecitve
  • (Of tea or beer) dark or thick
  • Having big muscles; physically powerful

window

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US / ˈwɪndəʊ /

UK / ˈwɪndoʊ /

A1
  • noun
  • Opening in a wall or door to let in light
  • Opening in a wall through which people do business

under

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US / ˈʌndə(r) /

UK / ˈʌndɚ /

A1
  • adjecitve
  • In the same place as another thing, but lower
  • adverb
  • In a lower quantity or price than expected
  • preposition
  • According to the terms of an agreement or law
  • Managed or controlled by the authority of
  • Being of a lesser quality or amount than expected
  • Influenced or affected by something or someone
  • Less or lower in age, amount, size or number

can

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US / kæn /

UK / kən,kæn /

A1
  • noun
  • A metal container for storing food
  • other
  • Able to; have the skill to; have the time to
  • verb
  • To have permission to
  • To be possible to do
  • To preserve food by sealing it in a metal container

concrete

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US / 'kɒŋkri:t /

UK / kɑnˈkrit, kɑŋ-, ˈkɑnˌkrit, ˈkɑŋ- /

B1
  • adjecitve
  • Concerning something that is physical or real
  • noun
  • Hard building material made of cement, sand, water
  • verb
  • To cover or make with a hard grey building material

nearly

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US / ˈniəli /

UK / ˈnɪrli /

A1
  • adverb
  • Not completely; almost

compare

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US / kəm'peə(r) /

UK / kəmˈpɛr /

A1
  • verb
  • To consider how similar and different things are

interested

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US / ˈɪntrəstɪd /

UK / ˈɪntrɪstɪd, -tərɪstɪd, -təˌrɛstɪd /

A1
  • adjecitve
  • Having had your attention taken; curious
  • verb
  • To make someone want to know about something
  • To persuade to do, become involved with something

limestone

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US / ˈlaɪmstəʊn /

UK / ˈlaɪmstoʊn /

B2
  • noun
  • Sedimentary rock consisting mainly of calcium

saturate

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US / ˈsætʃəreɪt /

UK / ˈsætʃəˌret /

B2
  • other
  • To cause something to become very wet
  • verb
  • To cause a liquid to not be able to absorb more
  • To try to fill up e.g. a market
  • To cause something to become very wet

really

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US / ˈri:əli /

UK / ˈriəˌli, ˈrili /

A1
  • adverb
  • Used to stress something that is said; definitely
  • In a true or accurate manner
  • Very

would

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US / wʊd /

UK / wʊd /

A1
  • other
  • Used to indicate something imagined
  • Used to ask or request something politely
  • Verb used to indicate possibility, request etc.
  • Used to indicate a preference
  • Used to indicate a reaction
  • Indicates something that occurred repeatedly
  • Used to indicate willingness or ability to do

hat

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US / hæt /

UK / hæt /

A1
  • noun
  • Item of clothing worn on your head

opportunity

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US / ˌɒpə'tju:nətɪ /

UK / ˌɑpɚˈtunɪti, -ˈtju- /

A2
  • noun
  • Time, situation when a thing might be done; chance

lump

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US / lʌmp /

UK / lʌmp /

B1
  • noun
  • Small swollen mass in body, e.g. showing disease
  • A small hard part of something smooth
  • verb
  • To combine things together in a group

periodic

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US / ˌpɪəriˈɒdɪk /

UK / ˌpɪriˈɑ:dɪk /

A2
  • adjecitve
  • Happening regularly, but not frequently

same

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US / seɪm /

UK / sem /

A1
  • adjecitve
  • Being equal in quality and amount
  • Identical; not different
  • Not changing; constant

tune

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US / tju:n /

UK / tun, tjun /

A2
  • noun
  • Group of musical notes that make a pleasant sound
  • verb
  • To make adjustments to equipment to make it better
  • To adjust to be at the right musical pitch
  • To modify how something operates, looks, e.g. car

not

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US / nɒt /

UK / nɑt /

A1
  • adverb
  • Word indicating the negative
  • (Used to form the negative of verbs)

our

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US / 'aʊə(r) /

UK / aʊr /

A1
  • determiner
  • Belonging to us

quite

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US / kwaɪt /

UK / kwaɪt /

A1
  • adverb
  • Not very; fairly
  • Very; In a complete or total manner

whether

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US / ˈweðə(r) /

UK / ˈhwɛðɚ, ˈwɛð- /

A1
  • conjunction
  • If something will happen or not

but

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US / bət /

UK / bʌt,bət /

A1
  • conjunction
  • Used before you say something different, opposite

compression

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US / kəm'preʃn /

UK / kəmˈprɛʃən /

B2
  • noun
  • Act of reducing something in time, size, quantity

give

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US / ɡɪv /

UK / ɡɪv /

A1
  • noun
  • Degree of flexibility in something, a material
  • verb
  • To hand over or present something to someone
  • To cause someone to have or experience something

stone

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US / stəʊn /

UK / stoʊn /

A2
  • noun
  • Hard, solid piece of rock
  • verb
  • To kill as a punishment, by throwing stones at

now

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US / naʊ /

UK / naʊ /

A1
  • adverb
  • At the present time or moment
  • Right away or in the next possible moment
  • Used to refer to something that just happened
  • Time between the present and a moment in the past
  • conjunction
  • Resulting from or because of something

table

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US / ˈteɪbl /

UK / ˈtebəl /

A1
  • noun
  • Diagram that shows data in rows and columns
  • Raised flat surface you sit at to work or eat
  • verb
  • To leave an idea to be discussed at a later date

drink

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US / drɪŋk /

UK / drɪŋk /

A1
  • noun
  • A liquid that you put in your mouth
  • verb
  • To put water in your body through your mouth

office

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US / ˈɒfɪs /

UK / ˈɔ:fɪs /

A1
  • noun
  • Room or building used for business
  • Important job position, often in a government

rod

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US / rɒd /

UK / rɑ:d /

B1
  • noun
  • Straight, thin stick or bar
  • Pole with a line and hook to catch fish with

chemistry

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US / 'kemɪstrɪ /

UK / ˈkɛmɪstri /

B1
  • noun
  • The study of the structure of substances

keep

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US / ki:p /

UK / kip /

A1
  • noun
  • Large, strong tower in the middle of a castle
  • Money spent on you so you can live in a place
  • verb
  • To continue doing something; not to stop
  • To stop balls going in a goal in sports
  • To not give back or return something
  • (Of food) to not spoil or not rot
  • To take possession of something to own, e.g. a pet
  • To have and continue to hold something
  • To do something that you have promised or agreed
  • To stay in a certain place or condition
  • To maintain the rules

disaster

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US / dɪ'zɑ:stə(r) /

UK / dɪˈzæstɚ, -ˈsæs- /

A2
  • noun
  • State of extreme ruin and misfortune

entirely

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US / ɪnˈtaɪəli /

UK / ɪnˈtaɪərli /

A2
  • adverb
  • Wholly; completely

from

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US / frəm /

UK / frʌm, frɑm,frəm /

A1
  • preposition
  • Starting at a particular place, time or level

press

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US / pres /

UK / prɛs /

A2
  • noun
  • Machine using pressure to shape, flatten, squeeze
  • General term for TV, radio, newspapers
  • A machine that prints books and newspapers
  • verb
  • To make clothes smooth using a heated iron; iron
  • To repeatedly ask someone to do something
  • To print something such as a book or newspaper
  • To push something against something else
  • To squeeze the liquid out of grapes, etc.

out

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US / aʊt /

UK / aʊt /

A1
  • adverb
  • No longer stylish (e.g. fashion)
  • Away from home, business, or the usual place
  • In a direction/movement away from inside or center
  • noun
  • Act when a batter cannot continue playing
  • verb
  • To tell people a secret

over

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US / 'əʊvə(r) /

UK / ˈovɚ /

A1
  • adverb
  • Finished; no longer happening
  • Towards the ground/away from a standing position
  • noun
  • A set of six consecutive balls bowled in cricket
  • other
  • Finished
  • preposition
  • Showing the relation when a thing is above another
  • On or covering something
  • Above or across something
  • More than you need
  • From one side to the other
  • In the direction of; toward

react

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US / rɪ'ækt /

UK / riˈækt /

A2
  • verb
  • To change when mixing with other chemicals
  • To behave or make a change in a particular way

arrive

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US / əˈraɪv /

UK / əˈraɪv /

A1
  • verb
  • To reach the place you are traveling to

experiment

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US / ɪk'sperɪmənt /

UK / ɪkˈspɛrəmənt /

A2
  • noun
  • Test performed to assess new ideas or theories
  • verb
  • To create and perform tests to research something
  • To try something new that you haven't tried before

come

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US / kʌm /

UK / kʌm /

A1
  • verb
  • To arrive at a place
  • (Of mail) to be delivered
  • To move toward someone; go with someone
  • To reach a certain point or state

company

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US / 'kʌmpənɪ /

UK / ˈkʌmpəni /

A1
  • noun
  • Good feeling from being with someone else
  • A business that sells things or provides services
  • Guests, especially in your home
  • Being with another person rather than alone

foreman

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US / ˈfɔ:mən /

UK / ˈfɔ:rmən /

B1
  • noun
  • Senior worker who controls other workers

think

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US / θɪŋk /

UK / θɪŋk /

A1
  • verb
  • To have an idea about something without certainty
  • To have an idea, opinion or belief about something

completely

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US / kəmˈpli:tli /

UK / kəmˈpliːtli /

A1
  • adverb
  • In every way or as much as possible

normally

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US / ˈnɔ:məli /

UK / ˈnɔːrməli /

B1
  • adverb
  • In the manner that is usual or ordinary

put

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US / pʊt /

UK / pʊt /

A1
  • phrasal verb
  • to make a light stop shining by pressing or moving a switch
  • verb
  • To move or place a thing in a particular position
  • To rate something in importance or value
  • To write or say something in a certain manner

perhaps

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US / pəˈhæps /

UK / pɚˈhæps /

A1
  • adverb
  • Possibly, but not certainly; maybe

spring

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US / sprɪŋ /

UK / sprɪŋ /

A1
  • noun
  • Coil of metal that lessens impact, e.g. on cars
  • Sudden jump from one place to another
  • The time when plants start growing after winter
  • Place where water flows from beneath the ground
  • verb
  • To lessen the impact of something under pressure
  • To jump into the air

call

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US / kɔ:l /

UK / kɔl /

A1
  • noun
  • A order or request for action
  • The sound an animal makes, often when in danger
  • A correct prediction, e.g. a decision in a game
  • A short visit to a place or person
  • A decision by a referee or umpire in a game
  • verb
  • To make a request or order for action
  • (Animal) to make sounds to warn of danger
  • To announce the date of an election
  • To make a judgment about something
  • To give someone or something a name
  • To guess in advance the result or outcome
  • To visit a place or person for a short time
  • To phone someone
  • To speak, announce or shout in a loud voice

far

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US / fɑ:(r) /

UK / fɑr /

A1
  • adjecitve
  • A long way away
  • Being a long way away
  • adverb
  • To a large degree or extent

leave

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US / li:v /

UK / liv /

A1
  • noun
  • Permission to do something
  • Vacation time; time off work
  • verb
  • To go away from; depart
  • To gift property to someone after you die
  • To allow something to continue happening
  • To let something remain unused or available
  • To let something or someone remain somewhere

where

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US / hwɛə /

UK / hwɛr, wɛr /

A1
  • conjunction
  • At or in the place which
  • In whatever place
  • pronoun
  • Word you use to ask the location of something

and

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US / ənd /

UK / ənd, ən,ænd /

A1
  • conjunction
  • Used to refer to two or more things
  • Plus; in addition; on top of that
  • Used to introduce an action that follows another

dig

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US / dɪg /

UK / dɪɡ /

A2
  • verb
  • To move material to create a hole

reinforcement

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US / ˌri:ɪn'fɔ:smənt /

UK / ˌriɪnˈfɔrsmənt, -ˈfors- /

B2
  • noun
  • Act of strengthening or supporting an army
  • Act of strengthening or adding support to

barker

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US / ˈbɑ:kə(r) /

UK / ˈbɑ:rkə(r) /

A1
  • other
  • Someone who stands in front of a show (as at a carnival) and gives a loud colorful sales talk to pot

find

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US / faɪnd /

UK / faɪnd /

A1
  • noun
  • Object discovered by chance
  • Things that have been discovered from searching
  • verb
  • To become aware of something that is happening
  • To discover or meet by chance
  • To decide if someone is guilty of a crime, or not
  • To learn through study, research, or effort
  • To discover something by looking for it

enough

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US / ɪˈnʌf /

UK / ɪˈnʌf /

A1
  • adjecitve
  • Sufficient to answer the need
  • adverb
  • To a satisfactory degree
  • pronoun
  • Equal to what is needed; as much as required
  • Adequate number or amount

mix

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US / mɪks /

UK / mɪks /

A2
  • noun
  • A combination of more than two things
  • verb
  • To combine two or more things to make one
  • To meet and get along with others, e.g. at a party

watch

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US / wɒtʃ /

UK / wɑtʃ /

A1
  • noun
  • Period of time someone is responsible for guarding
  • Device you wear on your wrist that shows the time
  • Official warning statement, e.g. of bad weather
  • verb
  • To keep in check, manage, or control something
  • To look at something for entertainment, e.g. TV
  • To guard a place or people; protect child, etc.
  • To look at carefully to work out what is happening
  • To protect and care for someone or something

about

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US / ə'baʊt /

UK / əˈbaʊt /

A1
  • adverb
  • To be ready to; going to
  • Nearly; approximately; roughly
  • Near; next to; close to
  • In every direction; in the area of
  • preposition
  • Concerning or of (a topic)

even

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US / 'i:vn /

UK / ˈivən /

A1
  • adjecitve
  • Being equal in influence, power, possibility etc.
  • Being divided equally or fairly
  • (Of teams/contest) with similar chances of success
  • Smooth, level, or regular
  • Can be divided by 2; ending in 2, 4, 6, 8, or 0
  • At a regular, equally steady manner
  • Remaining steady and unchanging
  • adverb
  • (When this is surprising) as well; too
  • (Used to compare two things/stress the difference)
  • verb
  • To make something level; to flatten
  • To make something equal

different

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US / ˈdɪfrənt /

UK / ˈdɪfrənt /

A1
  • adjecitve
  • Not of the same kind; unlike other things

like

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US / laɪk /

UK / laɪk /

A1
  • adjecitve
  • Being equal in status or kind to something else
  • Similar; the same
  • adverb
  • For example
  • preposition
  • Used as a filler; used to ad emphasis
  • In a way similar to the way something is done
  • Such as; for example
  • verb
  • To want to
  • To find something pleasing; to prefer something

people

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US / 'pi:pl /

UK / ˈpipəl /

A1
  • noun
  • Persons sharing culture, country, background, etc.
  • Men, Women, Children

site

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US / saɪt /

UK / saɪt /

A2
  • noun
  • Place that is reserved for a particular activity
  • Location of building work
  • Location of something
  • Place where something of special interest happened
  • Website
  • verb
  • To place something in a particular position, area

reaction

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US / rɪ'ækʃn /

UK / riˈækʃən /

A2
  • noun
  • Bodily response to a drug or something eaten
  • Feeling or action in response to something

that

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US / ðæt /

UK / ðæt, ðət /

A1
  • adjecitve
  • The person or thing being talked about
  • Used to identify something both the speakers know
  • adverb
  • Used to reinforce adjectives and adverbs
  • To such a degree
  • conjunction
  • Used to connect a noun clause
  • Used to introduce an adverbial clause
  • Used to introduce a noun clause
  • determiner
  • Used as a noun to refer to something
  • pronoun
  • Referring an object far away
  • Used to refer to the relative pronoun ‘which’

what

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US / wɒt /

UK / hwɑt, hwʌt, wɔt, wʌt,hwət, wət /

A1
  • pronoun
  • Thing or things that; the same kind as
  • Used to emphasize something you are about to say
  • adjecitve
  • Used to refer to a particular amount, or number
  • Used to place emphasis on a particular quality
  • adverb
  • To a certain degree
  • determiner
  • Question words used for asking for information
  • exclamation
  • Used to express excitement, shock, or surprise
  • Used to ask people to repeat something they said

silica

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US / ˈsɪlɪkə /

UK / ˈsɪlɪkə /

A1
  • noun
  • Chemical containing silicon used to make glass

student

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US / ˈstju:dnt /

UK / ˈstudnt, ˈstjud- /

A1
  • noun
  • Person studying at school

then

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US / ðen /

UK / ðɛn /

A1
  • adverb
  • A time that is not now
  • Following another thing in time or arrangement
  • Following on reasonably from what was just stated
  • At that time, not now

get

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US / ɡet /

UK / ɡɛt /

A1
  • verb
  • To become affected by illness or disease
  • To begin to feel or understand an emotion or idea
  • To send or bring someone or something home, etc.
  • To go somewhere to obtain something
  • To (cause to) do a particular thing
  • To obtain, receive or be given something
  • To currently have
  • To prepare for use
  • To understand something being said or read

hard

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US / hɑ:d /

UK / hɑː(r)d /

A1
  • adjecitve
  • Difficult to do; difficult to understand
  • (Of facts) not able to be misunderstood; clear
  • (Of alcohol) strong
  • Involving or requiring lots of work, effort, care
  • Being full of pain, trouble, and problems
  • Strong
  • (Of edge) clear; sharp
  • Difficult to bend, break or cut; solid
  • adverb
  • With lots of force, power, or impact

skip

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US / skɪp /

UK / skɪp /

B2
  • noun
  • Very large waste disposal bin
  • verb
  • To move forward by taking fast steps and jumps
  • To not do something expected or required
  • To move rapidly, from one topic to another

shatter

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US / 'ʃætə(r) /

UK / ˈʃætɚ /

B1
  • verb
  • To break into small pieces

dover

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US / 'dəʊvə /

UK / 'doʊvər /

A1
  • proper noun
  • A ferry port in Kent, in England, on the coast of the English Channel; population 35,200 (est. 2009)
  • The capital of Delaware, in the central part of the state; population 36,107 (est. 2008).
  • An industrial city in southeastern New Hampshire; population 28,609 (est. 2008).
  • A township in southeastern New Jersey, on Barnegat Bay; population 89,706 (2000).

example

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US / ɪgˈzɑ:mpl /

UK / ɪɡˈzæmpəl /

A1
  • noun
  • Thing, person which represents a category

happen

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US / 'hæpən /

UK / ˈhæpən /

A1
  • verb
  • To take place or occur

ground

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US / graʊnd /

UK / ɡraʊnd /

A1
  • noun
  • Connection of electrical equipment to earth
  • Place where people play particular sports
  • Solid surface of the earth that we stand on
  • verb
  • To break (coffee, etc.) into tiny bits with machine
  • To make loud jarring noise by pressing hard
  • To make sharp or smooth through friction
  • To press together with force making a sound
  • To punish someone by not allowing them to go out
  • To hit the bottom
  • (Of boat) to hit the bottom so it cannot move
  • To prevent a plane from taking off
  • To place the ball over the goal line in rugby

interesting

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US / ˈɪntrəstɪŋ /

UK / ˈɪntrɪstɪŋ, -tərɪstɪŋ, -təˌrɛstɪŋ /

A1
  • adjecitve
  • Taking your attention; making you want to know
  • verb
  • To make someone want to know about something
  • To persuade to do, become involved with something

nothing

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US / 'nʌθɪŋ /

UK / ˈnʌθɪŋ /

A1
  • noun
  • Item of little or no value, importance, interest
  • Number or value of zero
  • pronoun
  • Not anything, not a single thing

calcium

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US / 'kælsɪəm /

UK / ˈkælsiəm /

C2
  • noun
  • A substance important for making bones and teeth

result

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US / rɪ'zʌlt /

UK / rɪˈzʌlt /

A2
  • noun
  • Something produced through tests or experiments
  • Final score of a competition, election or game
  • verb
  • To be the outcome of other causes and effects

simple

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US / 'sɪmpl /

UK / ˈsɪmpəl /

A1
  • adjecitve
  • Not hard to understand or do; not complex
  • Having only a few parts; not complex
  • Being ordinary or normal
  • Being plain; without a lot added for style

reactor

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US / riˈæktə(r) /

UK / riˈæktɚ /

B1
  • noun
  • Device to control nuclear energy as a power source

look

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US / lʊk /

UK / lʊk /

A1
  • noun
  • Person's beauty or physical attractiveness
  • Particular style of dress, clothes, or appearance
  • The way someone, something appears to be
  • Act of searching for or examining something
  • verb
  • To appear to be; seem

pour

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US / pɔ:(r) /

UK / pɔr, por /

A2
  • verb
  • To fill a person's glass or cup with a drink
  • To make something flow in a steady stream
  • To rain very heavily

between

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US / bɪˈtwi:n /

UK / bɪˈtwin /

A1
  • preposition
  • From one person, thing, or place, to another
  • In the space that separates two objects
  • Among two or more people who share something

they

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US / ðeɪ /

UK / ðe /

A1
  • pronoun
  • Two or more people, animals, or things

very

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US / 'verɪ /

UK / ˈvɛri /

A1
  • adjecitve
  • Concerning a large degree or amount
  • adverb
  • A lot; much; many
  • Used to stress or emphasize a noun

build

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US / bɪld /

UK / bɪld /

A1
  • noun
  • Your physical shape; physique
  • verb
  • To establish e.g. a reputation, over time
  • To construct a house, office, factory

building

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US / ˈbɪldɪŋ /

UK / ˈbɪldɪŋ /

A1
  • noun
  • A structure with a roof and walls, e.g. a house
  • verb
  • To establish e.g. a reputation, over time
  • To construct a house, office, factory

all

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US / ɔ:l /

UK / ɔl /

A1
  • adverb
  • Completely; totally
  • determiner
  • Being every one of something
  • pronoun
  • 100% of something; the complete amount

remove

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US / rɪˈmu:v /

UK / rɪˈmuv /

A1
  • verb
  • To get rid of something completely
  • To make someone leave his or her job or position
  • To move, erase or take away from a place
  • To take something off (e.g. clothing)

strange

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US / streɪndʒ /

UK / strendʒ /

A1
  • adjecitve
  • Unusual or odd; surprising because unexpected

top

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US / tɒp /

UK / tɑp /

A1
  • adjecitve
  • Being good or great; excellent
  • Being the most in degree or quality
  • noun
  • Item of clothing covering shoulders to waist, hips
  • A cover or lid
  • Part (e.g. road) that is the furthest away
  • Highest or upper part or point of something
  • Best or highest status or position
  • Flat upper surface or edge of an object
  • Child's toy that spins on its point
  • Upper section or leaves of fruits and vegetables
  • Winning in a sport or contest
  • verb
  • To be higher or larger than a specific value
  • To arrive at the highest point of something
  • To put a cover or layer or over something
  • To kill; murder
  • To hold the highest position on a list
  • To be more important, successful or better than
  • To beat someone or win at a game

who

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US / hu: /

UK / hu /

A1
  • pronoun
  • Which person
  • Used to introduce information about people

add

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US / æd /

UK / æd /

A1
  • verb
  • To include as well
  • To put two things or numbers together, e.g. 2+2

dioxide

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US / daɪˈɒksaɪd /

UK / daɪˈɑksaɪd /

B2
  • noun
  • An oxide containing two oxides per molecule

take

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US / teɪk /

UK / tek /

A1
  • noun
  • Filming of a single scene for TV or the movies
  • verb
  • To accept something that is offered
  • To use a method of traveling, e.g. a bus or train
  • To use a camera to make (a photo)
  • To pick up something and go away with it
  • To study a subject in school
  • To attempt to pass (an exam)
  • To require a certain amount of time, money, space

tie

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US / taɪ /

UK / taɪ /

A2
  • noun
  • Item, such as string or wire, used to join things
  • Strong connection between people, countries
  • When both sides in a game, vote get same score
  • One match or game that is part of a bigger contest
  • Something that lessens a person's freedom
  • Thin piece of cloth worn round neck of shirt
  • Piece of wood/metal used to stop something moving
  • verb
  • To attach things (together) with a string or rope
  • To end a game, contest or vote with the same score
  • To require someone to be in a specific place

yesterday

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US / ˈjestədeɪ /

UK / ˈjestərdeɪ /

A1
  • adverb
  • Day before today
  • noun
  • Day before today

pretty

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US / 'prɪtɪ /

UK / ˈprɪti /

A1
  • adjecitve
  • Being attractive to the eye in a simple way
  • adverb
  • Very; to a great degree

main

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US / meɪn /

UK / men /

A1
  • adjecitve
  • Most important; most often used

several

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US / ˈsevrəl /

UK / ˈsɛvərəl,ˈsɛvrəl /

A1
  • adjecitve
  • Many of
  • pronoun
  • More than two but not a large amount

ago

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US / əˈgəʊ /

UK / əˈgoʊ /

A1
  • adverb
  • At a specified length of time in the past

move

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US / mu:v /

UK / muv /

A1
  • noun
  • Act of moving a playing piece in chess, etc.
  • An action; doing something
  • Step taken to achieve a goal
  • verb
  • To cause someone to have certain emotions
  • To cause something to change to a different place
  • To change where people live or a business operates
  • To take action to do or achieve something

mixture

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US / ˈmɪkstʃə(r) /

UK / ˈmɪkstʃɚ /

B1
  • noun
  • Something made by combining two or more things

carbonate

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US / ˈkɑ:bəneɪt /

UK / ˈkɑ:rbənət /

C2
  • noun
  • A chemical including carbon dioxide
  • verb
  • To charge a drink with carbon dioxide

mesh

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US / meʃ /

UK / mɛʃ /

B2
  • noun
  • Crisscrossed wires to allow air/liquid through

sodium

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US / 'səʊdɪəm /

UK / ˈsodiəm /

B2
  • noun
  • A soft, white chemical element

speak

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US / spi:k /

UK / spik /

A1
  • verb
  • To be able to use a certain language
  • To use words to tell information, express thoughts

use

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US / ju:s /

UK / ju:s /

A1
  • noun
  • Ability to employ something
  • Need to enable it to work
  • Permission to do something with something
  • Act of spending money
  • Operation of a machine for its function
  • verb
  • To have; to eat, drink, consume etc.
  • To need to operate or work
  • To operate a machine, e.g. a computer
  • To treat a person badly
  • To do something with, for a task or purpose

violent

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US / ˈvaɪələnt /

UK / ˈvaɪələnt /

A2
  • adjecitve
  • Done with force; likely to produce physical damage

stick

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US / stɪk /

UK / stɪk /

A2
  • noun
  • Long thin piece of wood from a tree
  • verb
  • To push a sharp or pointed object into something
  • To join together using glue or paste
  • To remain in one place or position for a long time

walk

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US / wɔ:k /

UK / wɔk /

A1
  • noun
  • Journey on foot done for pleasure or exercise
  • verb
  • To move with your legs at a slowish pace

sort

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US / sɔ:t /

UK / sɔrt /

A1
  • noun
  • Group or class of similar things or people
  • verb
  • To organize things by putting them into groups
  • To deal with things in an organized way

white

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US / waɪt /

UK / hwaɪt, waɪt /

A1
  • adjecitve
  • Belonging to a race of people with light skin
  • Of the color of fresh snow and milk
  • noun
  • Person's name
  • Lightest color; The color of fresh snow.

compress

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US / kəmˈpres /

UK / kəmˈprɛs /

B1
  • verb
  • To press tightly together
  • To make smaller; reduce in time, size etc.

crane

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US / kreɪn /

UK / kren /

B2
  • noun
  • Water bird characterized by its long neck and legs
  • Tall machine that lifts heavy objects in the air
  • verb
  • To stretch (neck) or lean to get better view

here

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US / hɪə(r) /

UK / hɪr /

A1
  • adverb
  • In this place; at this location, position or time

new

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US / nju: /

UK / nu, nju /

A1
  • adjecitve
  • Not old, recently born, built or made
  • Being or doing something for the first time
  • Not felt, seen or known previously
  • Having been recently bought or obtained

fairly

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US / 'feəlɪ /

UK / ˈfɛrli /

A2
  • adverb
  • Quite; pretty; between very and a little
  • In a manner that is right and acceptable

feel

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US / fi:l /

UK / fil /

A1
  • verb
  • To be aware of or experience an emotion, sensation
  • To sense through direct contact; touch

carbon

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US / 'kɑ:bən /

UK / ˈkɑrbən /

B1
  • noun
  • Chemical element with an atomic number of 6

global

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US / ˈgləʊbl /

UK / ˈgloʊbl /

A2
  • adjecitve
  • Concerning, involving, affecting all of something
  • Of, affecting, or involving the entire world

heat

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US / hi:t /

UK / hit /

A2
  • noun
  • State of anger, excitement, or arguing
  • Particular temperature at which to cook something
  • High temperature
  • One of series of races to find the finalists
  • Hot temperature, conditions, or weather
  • verb
  • To make hot or hotter

underwater

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US / ˌʌndəˈwɔ:tə(r) /

UK / ˈʌndɚˌwɔtɚ, -ˌwɑtɚ /

C2
  • adjecitve
  • (Moving or existing) beneath the surface of water

already

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US / ɔ:lˈredi /

UK / ɔlˈrɛdi /

A1
  • adverb
  • Having happened or been done before this time

itself

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US / ɪtˈself /

UK / ɪtˈsɛlf /

A1
  • pronoun
  • Referring to it

liquid

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US / ˈlɪkwɪd /

UK / ˈlɪkwɪd /

A2
  • adjecitve
  • (Of wealth) being able to be spent as cash
  • In a state of being uncertain
  • Moving in a flowing manner, like water or oil
  • noun
  • Something that is similar to the state of water

sand

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US / sænd /

UK / sænd /

A2
  • noun
  • Area composed of tiny pieces of rock near an ocean
  • Small pieces of rock that make beaches and deserts
  • verb
  • To cover a surface with grit e.g. roads
  • To smoothen a surface with sandpaper

ultimate

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US / ˈʌltɪmət /

UK / ˈʌltəmɪt /

A2
  • adjecitve
  • Basic; original; most significant
  • Being the greatest example of something
  • Happening or coming at the end of process; final

will

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US / wɪl /

UK / wɪl /

A1
  • noun
  • Desire or choice of someone
  • Document saying who gets your money when you die
  • Strong desire to do something; determination
  • Desire to do something; strong wish to do
  • other
  • Used with verbs to express the future
  • verb
  • To leave property to someone after your death
  • To use mental effort to make something happen
  • Am (is, are) likely to do
  • To influence someone to do something
  • To make something happen by strongly wanting it

ever

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US / 'evə(r) /

UK / ˈɛvɚ /

A1
  • adverb
  • At any time; at all times in the future

day

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US / deɪ /

UK / de /

A1
  • noun
  • A period of 24 hours beginning at midnight
  • The period of time when it is light outside
  • Person's name

persuade

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US / pəˈsweɪd /

UK / pərˈsweɪd /

A2
  • verb
  • To try to make someone to do, believe something

sure

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US / ʃʊə(r) /

UK / ʃʊr /

A1
  • adjecitve
  • Having no doubts about something
  • Have confidence in your own words or actions
  • Firmly established or held; being firm or stable
  • Being correct or true
  • adverb
  • What you say to agree willingly

vibrate

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US / vaɪˈbreɪt /

UK / ˈvaɪˌbret /

B2
  • verb
  • To shake side to side quickly in small movements

behind

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US / bɪˈhaɪnd /

UK / bɪˈhaɪnd /

A1
  • adjecitve
  • Concerning a later or slower time than expected
  • Being in a losing position in a sporting event
  • Being in the past; old fashioned
  • adverb
  • Remaining
  • noun
  • The part of the body that one sits on
  • preposition
  • At or toward the back of someone or something
  • Supporting or helping someone

could

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US / kəd /

UK / kʊd /

A1
  • other
  • Past form of 'can' to mean have ability
  • Used to ask for something politely, or to offer

know

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US / nəʊ /

UK / noʊ /

A1
  • verb
  • To be familiar with a person or place, thing
  • To feel sure or be convinced about something
  • To discover or be aware of something
  • To be able to distinguish
  • To have knowledge of things

float

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US / fləʊt /

UK / floʊt /

B1
  • noun
  • Object designed to stay on the surface of water
  • Decorated truck used in a festival
  • verb
  • To sell the shares of a company publicly
  • To move slowly and easily through air
  • To rest on the surface of water without sinking

dark

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US / dɑ:k /

UK / dɑrk /

A1
  • adjecitve
  • Of a color that is not light
  • Marked by unhappiness or hopelessness
  • Having little or no light; not light in color
  • noun
  • The time of day when the sky is black

month

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US / mʌnθ /

UK / mʌnθ /

A1
  • noun
  • One of 12 28-31 day periods in the year

group

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US / ɡru:p /

UK / ɡrup /

A1
  • noun
  • Two or more musicians who play music together
  • Number of people or things gathered together
  • verb
  • To combine or collect objects or people together

problem

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US / ˈprɒbləm /

UK / ˈprɑbləm /

A1
  • adjecitve
  • Causing trouble
  • noun
  • Something difficult to deal with or causes trouble
  • Question to show understanding of a math concept

next

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US / nekst /

UK / nɛkst /

A1
  • adverb
  • The one that follows another in time or order
  • At a time or place directly after the present one
  • noun
  • The one that follows after
  • adjecitve
  • Immediately after the previous one
  • First occurrence after the present one

quickly

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US / ˈkwɪkli /

UK / ˈkwɪklɪ /

A1
  • adverb
  • Without taking a lot of time; fast

before

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US / bɪˈfɔ:(r) /

UK / bɪˈfɔr,-ˈfor /

A1
  • adverb
  • At a time earlier than the present; previously
  • conjunction
  • In advance of something happening
  • preposition
  • In front of someone or something

extra

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US / 'ekstrə /

UK / 'ekstrə /

A2
  • adjecitve
  • More than necessary; additional
  • noun
  • Items more than you need; additional items
  • Person who has a small part in a movie
  • Special version of a newspaper

have

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US / həv /

UK / hæv /

A1
  • verb
  • To drink, smoke, eat or use something
  • To experience the effects of something
  • To organize an event, or join in an activity
  • To own, possess, or hold something
  • To cause to happen or produce a particular effect

last

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US / lɑ:st /

UK / læst /

A1
  • adjecitve
  • Most recent; the latest
  • The one before
  • adverb
  • Final; with nothing following; after all others
  • Most recent; the latest
  • determiner
  • The one at the end
  • verb
  • To remain or continue for a certain period of time

air

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US / eə(r) /

UK / er /

A1
  • noun
  • Mixture of gases around the earth that we breathe
  • A person's manner intended to impress others
  • verb
  • To expose to the outside, to dry or freshen
  • To broadcast a TV or radio show
  • To open a subject to discussion and debate

conscious

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US / ˈkɒnʃəs /

UK / ˈkɑnʃəs /

A2
  • adjecitve
  • Aware of what is going on around you

break

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US / breɪk /

UK / brek /

A1
  • noun
  • Time you stop an activity before continuing
  • End of a relationship
  • An escape from a place such as a jail
  • (Lucky) advantage or benefit from something
  • Find a solution or answer to a problem or crime
  • Change in the weather
  • verb
  • To create a new record e.g. running the 100m dash
  • To form a crack in something
  • To burst or become damaged
  • To end a relationship
  • To escape from a place such as a jail
  • To train a wild animal e.g. a horse
  • To separate into pieces by force, or by dropping
  • To act against a law, rule, or promise
  • To become known suddenly, as in the news
  • To not do what you promised e.g. not keep promises
  • To solve a crime, or answer a problem
  • To stop functioning properly
  • To suddenly start, open or commence
  • To change in pitch suddenly, as in a voice
  • To fall on the shore, as in waves
  • To begin or change suddenly; the dawn or weather
  • To defeat by causing the person to lose their will

fantastic

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US / fænˈtæstɪk /

UK / fænˈtæstɪk /

A2
  • adjecitve
  • Strange or unusual in design or appearance
  • Very large, fast or great
  • Hard to believe; amazing

roman

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US / rɔmə /

UK / roˈmɑŋ /

A1
  • adjecitve
  • A resident of modern Rome
  • other
  • A typeface used in ancient Roman inscriptions
  • An inhabitant of the ancient Roman Empire
  • Characteristic of the modern type that most directly represents the type used in ancient Roman inscr
  • Of or relating to or supporting Romanism
  • Relating to or characteristic of people of Rome

recycle

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US / ˌri:'saɪkl /

UK / riˈsaɪkəl /

A2
  • verb
  • To use old ideas or concepts again
  • To send used things to be turned into new things

weak

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US / wi:k /

UK / wik /

A1
  • adjecitve
  • Not having a strong character
  • Less valuable compared to money of other countries
  • Ineffective; unconvincing; not strong
  • Having little power or ability
  • Not having the necessary or proper amount
  • Having little power; not strong; easy to break
  • (Of a drink) having lots of water and little taste

coolant

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US / ˈku:lənt /

UK / ˈkulənt /

C2
  • noun
  • Fluid agent (gas or liquid) that produces cooling

theatre

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US / ˈθiətə /

UK / ˈθi:ətər /

A2
  • noun
  • Place where plays are seen
  • The place operations are performed in a hospital
  • Area or place something happens

campus

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US / 'kæmpəs /

UK / ˈkæmpəs /

B1
  • other
  • Grounds of an institution, e.g. a university

lime

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US / laɪm /

UK / laɪm /

B2
  • adjecitve
  • Bright green color
  • noun
  • White containing calcium used in farming
  • Small, round and sour fruit with hard green skin

see

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US / si: /

UK / si /

A1
  • verb
  • To go on a date with someone
  • To predict whether something is, or will be true
  • To understand what someone says
  • To use your eyes to look at something
  • To visit a place often for sightseeing or pleasure
  • To visit or meet with someone
  • To find out by waiting or looking
  • To watch (a game, movie or TV show)

silicon

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US / ˈsɪlɪkən /

UK / ˈsɪlɪkən, -ˌkɑn /

B2
  • noun
  • Mineral used in making steel and computer parts

with

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US / wɪð /

UK / wɪð, wɪθ /

A1
  • preposition
  • As an employee of a certain company
  • Against something or someone
  • By using something as a means
  • Due to; because of
  • Including
  • Possessing as a feature
  • Related to
  • (Of the manner/attitude by which you do something)
  • Used to express that people or things are together

into

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US / 'ɪntə /

UK / ˈɪntu /

A1
  • preposition
  • Moving or going inside something
  • In the same direction as; in the direction of
  • So as to become; taking the state of

pull

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US / pʊl /

UK / pʊl /

A1
  • noun
  • Act of breathing in smoke, as from a pipe
  • Force something has that draws other things to it
  • Using your hands to move something to you
  • verb
  • To breathe in smoke, as from a pipe
  • To hold something and move it toward you
  • To remove something by force

one

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US / wʌn /

UK / wʌn /

A1
  • pronoun
  • You; we; people in general; someone
  • The thing or person previously referred to
  • adjecitve
  • Used to refer to people generally
  • Being a strong example of (something mentioned)
  • number
  • Number 1

strength

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US / streŋθ /

UK / strɛŋkθ, strɛŋθ, strɛnθ /

A2
  • noun
  • Condition of being strong

surface

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US / 'sɜ:fɪs /

UK / ˈsɚfəs /

A2
  • adjecitve
  • Of the top layer; not deep or meaningful
  • noun
  • Top layer of the ground or of water
  • Nature or emotions that show, but may not be true
  • Outside or upper layer of something
  • verb
  • To give (road) a top layer
  • To appear after being hidden, unseen, or unknown
  • To come to the top of something; emerge
  • To come to the top level of water, mud, etc.

university

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US / ˌju:nɪ'vɜ:sətɪ /

UK / ˌjunɪˈvɜrsəti /

A1
  • noun
  • High-level educational institution; college

core

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US / kɔ:(r) /

UK / kɔr, kor /

A2
  • noun
  • Important central part of something
  • verb
  • To take out the central section of a fruit

bottle

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US / 'bɒtl /

UK / ˈbɑtl /

A1
  • noun
  • Container with a narrow neck used to hold liquids
  • verb
  • To put something into a bottle to store it

lorry

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US / ˈlɔri /

UK / ˈlɔri, ˈlɑri /

B1
  • noun
  • Truck; a large vehicle for carrying goods

oxide

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US / ˈɒksaɪd /

UK / ˈɑ:ksaɪd /

B2
  • noun
  • Compound from combining oxygen with a chemical

ready

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US / 'redɪ /

UK / ˈrɛdi /

A1
  • adjecitve
  • Being likely or about to do something
  • Being willing to do a task
  • verb
  • To prepare something for use or action

this

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US / ðɪs /

UK / ðɪs /

A1
  • adjecitve
  • Used to indicate something already been discussed
  • Used to indicate something happening around now
  • adverb
  • An indication by a physical motion or gesture
  • A specific amount of
  • determiner
  • Person, thing, or idea near you
  • pronoun
  • Person, thing that has already been discussed

big

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US / bɪɡ /

UK / bɪɡ /

A1
  • adjecitve
  • Popular
  • Serious
  • Large

easily

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US / ˈi:zəli /

UK / ˈizəli /

A1
  • adverb
  • Clearly; without doubt; certainly
  • Without difficulty

let

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US / let /

UK / lɛt /

A1
  • verb
  • To allow someone to do something
  • Introducing a suggestion to do something together
  • To rent a house, etc. to others

the

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US / ðə /

UK / ðə /

A1
  • article
  • Used to refer to something already mentioned
  • Used to show there is only one of something
  • determiner
  • Used to describe all of a family

wet

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US / wet /

UK / wɛt /

A1
  • adjecitve
  • Concerning a bar that serves or sells alcohol
  • Having or experiencing a great deal of rain
  • Containing water or liquid; not dry
  • verb
  • To accidentally pee in clothes or a bed

bridge

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US / brɪdʒ /

UK / brɪdʒ /

A2
  • noun
  • Structure built over river, road so you can cross
  • verb
  • To make a link between; bring together

make

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US / meɪk /

UK / mek /

A1
  • noun
  • Product made by a particular company; brand
  • verb
  • To arrange or prepare something e.g. dinner
  • To get to (a place) on time
  • To gain the status of (teacher, lawyer, etc.)
  • To create something by putting things together
  • To earn a certain amount of money at a job
  • To cause or force a person to do something
  • To cause something to happen or be formed

run

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US / rʌn /

UK / rʌn /

A1
  • noun
  • Journey between two places made by ship or car
  • Series of similar things or successes and failures
  • Act of running; exercise of running
  • verb
  • To depart or travel according to a schedule
  • To cause an animal to move in a certain direction
  • (Of an engine) to be operating
  • To start or use a computer program
  • To flow in a certain direction, like a liquid
  • To manage or operate a business
  • To operate or drive something
  • (Of a road) to go from one place to another
  • To move your legs faster than walking

chemical

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US / ˈkemɪkl /

UK / ˈkɛmɪkəl /

A2
  • adjecitve
  • Made of various elements
  • noun
  • Basic substance produced by mixing elements

stand

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US / stænd /

UK / stænd /

A1
  • noun
  • Effort to fight against something
  • Piece of furniture; device to hold or support
  • Place in a stadium where spectators watch
  • Table where things are sold at a fair or market
  • verb
  • To be a candidate in an election
  • To be able to accept someone, something; bear
  • To last for a long time
  • To be upright; not be sitting or lying down
  • To place something in a particular position; place
  • To be (as stated)
  • To still be valid
  • To have an opinion about something

also

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US / 'ɔ:lsəʊ /

UK / ˈɔlso /

A1
  • adverb
  • In addition; too; in a similar way

colleague

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US / 'kɒli:ɡ /

UK / ˈkɑlˌiɡ /

A2
  • noun
  • Person you work or cooperate with

cheap

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US / tʃi:p /

UK / tʃip /

A1
  • adjecitve
  • Not costing a lot of money
  • Having a low quality or value
  • Not liking to spend money; mean; stingy

year

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US / jə: /

UK / jɪr /

A1
  • noun
  • Unit of time equal to 12 months or 365 or 366 days
  • Used to refer to the age of a person

you

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US / jʊ /

UK / ju /

A1
  • pronoun
  • Person someone is speaking or writing to
  • Person or people in general
  • Subtitles section
  • For the last few months I've been looking out of the window of my office, you can see it just behind me, and watching a new building being built with lecture theatres for the students.
  • And a few days ago, walking to lunch, I thought this is a fantastic opportunity to talk about the chemistry of concrete.
  • So here we are, on the top of the building site, in a hard hat, special gloves, periodic tie, and we're ready to go with chemistry of concrete.
  • And as I speak, the lorry is arriving with the concrete, ready to be poured, and we'll watch it coming out.
  • So now they're pouring the concrete out into this skip, and they're going to crane it up to where we can see it being poured out.
  • So this is what I've been watching out of my window.
  • You can see the concrete skip going up now on this big crane, and it'll go high over our heads to where they're going to pour.
  • The chemistry of concrete is quite simple.
  • Somewhere you dig up limestone, calcium carbonate, and then you heat it up and drive off the carbon dioxide to make calcium oxide.
  • Some people call it lime.
  • And then you mix this with sand.
  • Sand is silicon dioxide, SiO2.
  • Silicon is in the same group as carbon in the periodic table.
  • So you take the mixture of sand and lime, and you add to this some sort of stone.
  • It's known as aggregate.
  • What they're pouring here is 25% aggregate.
  • It's recycled aggregate.
  • They haven't dug the stone out from under the ground.
  • They've used recycled stone, because my university is very conscious of being green.
  • We have one of the greenest campuses in the UK.
  • When you mix these together, the aggregate, the silicon dioxide, and the lime, and you mix them with water, then a chemical reaction starts.
  • And as long as you keep it moving, nothing sets solid.
  • But as soon as you let it stand, the silicon dioxide and the calcium oxide react together and make a sort of jelly, which gets harder and harder.
  • It takes several days to set really hard, and then it reacts with the carbon dioxide in the air for years and years and years afterwards.
  • So Roman concrete that was made 2,000 years ago is really hard, because it's had 2,000 years to react with the carbon dioxide in the air.
  • But this is some that was made yesterday, and you can see the aggregate here, these lumps sticking out.
  • And it's already very hard.
  • I can't break it.
  • And the important thing about concrete is it's very strong in compression.
  • If you press it, you can put enormous load before it breaks.
  • It's not nearly so strong in tension.
  • If you pull it, I'm not strong enough, but if you pull this, it would break fairly easily compared to what would happen if you compressed it.
  • And to make it even stronger, people put in steel mesh.
  • You can see some here, the reinforcement rods, which the concrete can bind to the steel, and this gives it added strength.
  • As far as I know, nobody's ever going to run out of concrete.
  • The cliffs of Dover, the white cliffs of Dover, the symbol of Britain, are entirely made out of calcium carbonate.
  • There is possibly problems with the carbon dioxide you generate, which add to global warming, but we're never going to run out of concrete.
  • Concrete is much weaker if you have bubbles in them, so that when you pour the concrete, it's then vibrated to make sure that all the bubbles float to the surface.
  • If you do get bubbles, it breaks easily.
  • The chemical company ICI, about 30 years ago, made a special sort of cement which you could get out all the bubbles, and you could make springs and all sorts of strange things out of concrete or cement that normally you can't use.
  • They even made bottle tops for drinks bottles out of cement.
  • The main difference between cement and concrete is whether you add the aggregate, whether you add these extra stones.
  • And the people who pour cement can make different mixtures for different purposes.
  • They make special mixtures to use underwater, because concrete will set even when it's underwater.
  • For example, if you're building a dam, or if you're building some sort of bridge, where it's on very wet soil.
  • Perhaps not completely underwater, but in very saturated soil.
  • It is very cheap, it's very strong, and you can use it in all sorts of different applications.
  • You can tune it, and you can also do it very quickly.
  • This beam that's being poured over here will be ready tomorrow.
  • I had a colleague who died 10 years ago, called Martin Barker, who was interested in the chemistry of liquid sodium.
  • And he did some experiments with liquid sodium reacting with concrete.
  • This is the ultimate nuclear reactor disaster, when the core melts and sodium coolant goes into the concrete.
  • And he found that there was quite a violent reaction, depending on the aggregate.
  • But there was some very interesting chemistry, and I persuaded him to give a lecture that he called Some Concrete Results from Sodium Chemistry.
  • And it was a very successful lecture.
  • Well, it just feels like it's some stones.
  • But you can see, here are the pieces of aggregate.
  • And the concrete itself, the cement-sand mixture, is pretty wet now.
  • And over the next few hours, this will set solid.
  • The foreman here said that it'll be hard enough to remove the shattering in 8 hours.
  • It'll be dark by then.
  • So they'll leave it till tomorrow morning.