Subtitles section
Repeat sentence
Subtitles mode
Full screen
Previous
Next
x 1.0
Playback speed
More

Katie Mack Explains The Big Bang To John Green

Video vocabulary

point

Copy vocabulary

US / pɔɪnt /

UK / pɔɪnt /

A1
  • noun
  • An item to be discussed
  • Small spot or dot
  • Fact or detail
  • Feature of something
  • The size of the text on a page or screen
  • A certain time or stage in a process
  • Certain position in time or space
  • Idea or fact you try to convince people about
  • Measurement of scores in a game, sport
  • Sharp end of something, e.g. a pen or pin
  • verb
  • To face a certain direction, e.g. north
  • To indicate something with your finger to others

story

Copy vocabulary

US / 'stɔ:rɪ /

UK / ˈstɔri, ˈstori /

A1
  • noun
  • One of many floors or levels in a building
  • Account or description of how something happened

past

Copy vocabulary

US / pɑ:st /

UK / pæst /

A2
  • adjecitve
  • No longer current or new
  • adverb
  • So as to go beyond, or further than something
  • noun
  • Time that existed before now, e.g. long ago
  • preposition
  • After a particular time
  • At a later point in distance; beyond

gamma

Copy vocabulary

US / 'ɡæmə /

UK / ˈɡæmə /

B2
  • noun
  • Third letter of the Greek alphabet

sort

Copy vocabulary

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

small

Copy vocabulary

US / smɔ:l /

UK / smɔl /

A1
  • adjecitve
  • Little in size; not big
  • (Of letters) not written in capital letters
  • Being insignificant or minor
  • (Of a business) with few people or things; local
  • (Of voice) being soft and quiet
  • (Of a child) being young

use

Copy vocabulary

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

confirmation

Copy vocabulary

US / ˌkɒnfəˈmeɪʃn /

UK / ˌkɑ:nfərˈmeɪʃn /

B1
  • noun
  • Approval or check of something
  • Statement something is real, true or accurate

actually

Copy vocabulary

US / ˈæktʃuəli /

UK / ˈæktʃuəli /

A1
  • adverb
  • Used to add new (often different) information

will

Copy vocabulary

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

guess

Copy vocabulary

US / ɡes /

UK / ɡɛs /

A1
  • noun
  • Answer given when you don't know if it is correct
  • verb
  • To give an answer without knowing if it is correct

after

Copy vocabulary

US / 'ɑ:ftə(r) /

UK / ˈæftɚ /

A1
  • adverb
  • Later than another time, or behind something
  • conjunction
  • Following something before
  • preposition
  • When an event happened or time has passed

explode

Copy vocabulary

US / ɪk'spləʊd /

UK / ɪkˈsplod /

B1
  • verb
  • To express an emotion in a sudden and loud way
  • To increase in number or amount very quickly
  • To burst or cause to burst into pieces

astronomer

Copy vocabulary

US / əˈstrɒnəmə(r) /

UK / əˈstrɑ:nəmə(r) /

B2
  • noun
  • Scientist studying stars and other bodies in space

talk

Copy vocabulary

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

pitch

Copy vocabulary

US / pɪtʃ /

UK / pɪtʃ /

B1
  • adjecitve
  • Very dark black color
  • noun
  • Act of throwing a baseball for someone to hit
  • Playing fields in sports, e.g. for soccer
  • Attempt to sell/persuade someone of the value of
  • Degree of slope on e.g. a plane's wing
  • Measure of how high or low a sound is
  • Black substance that is very stick when heated
  • verb
  • To suggest a product, idea to make someone buy
  • To throw a baseball to a batter
  • To plunge or fall forward or headlong
  • To set up a camp or tent for a length of time
  • To attempt to sell something to someone
  • To set a sound to a certain level

just

Copy vocabulary

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)

heck

Copy vocabulary

US / hek /

UK / hɛk /

A1
  • exclamation
  • Expressing surprise, or frustration

begin

Copy vocabulary

US / bɪ'ɡɪn /

UK / ˈbeɡɪn /

A1
  • verb
  • To do the first part of an action; to start

eight

Copy vocabulary

US / eɪt /

UK / et /

A1
  • number
  • 8

cool

Copy vocabulary

US / ku:l /

UK / kul /

A1
  • adjecitve
  • Steady and calm when facing difficulties
  • Almost cold; not warm or hot
  • Smart or stylish in a way (young) people admire
  • Unfriendly in an indirect way; distant
  • verb
  • To make something decrease in temperature
  • (Of an emotion, etc.) to become less strongly felt

time

Copy vocabulary

US / taɪm /

UK / taɪm /

A1
  • noun
  • Speed at which music is played; tempo
  • Point as shown on a clock, e.g. 3 p.m
  • Number of hours, minutes needed to do something
  • Occasion when something happens
  • Period or occasion that something occurred
  • Period in history or the past
  • Something measured in minutes, hours, days, etc.
  • How long an event takes; duration
  • verb
  • To check speed at which music is performed
  • To choose a specific moment to do something
  • To measure how long an event takes, e.g. a race
  • To schedule something to occur at a specific moment

short

Copy vocabulary

US / ʃɔ:t /

UK / ʃɔrt /

A1
  • adverb
  • Less than what is needed
  • Suddenly stopping what you are saying or doing
  • verb
  • (Of electric circuit) to spark because faulty
  • adjecitve
  • Measuring a small distance
  • Happening for a small amount of time
  • Unfriendly or rude

ray

Copy vocabulary

US / reɪ /

UK / re /

B1
  • noun
  • Person's name
  • Lines of light coming from an object
  • Fish with a pointed tail and flat body

for

Copy vocabulary

US / fə(r) /

UK / fɔr,fə /

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

well

Copy vocabulary

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

since

Copy vocabulary

US / sɪns /

UK / sɪns /

A1
  • adverb
  • At a point before the present time
  • conjunction
  • For this reason; because
  • preposition
  • From the time in the past that

start

Copy vocabulary

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

song

Copy vocabulary

US / sɒŋ /

UK / sɔ:ŋ /

A1
  • noun
  • Distinctive series of sounds made by a bird
  • Music with words that are sung to it
  • Art or tradition of singing

those

Copy vocabulary

US / ðəʊz /

UK / ðoz /

A1
  • determiner
  • The people or things we are talking about
  • pronoun
  • The objects far from the speaker

light

Copy vocabulary

US / laɪt /

UK / laɪt /

A1
  • adjecitve
  • Being bright making it easy to see; not dark
  • Being pale and lacking darkness of color
  • Not heavy; weighing only a little
  • adverb
  • Carrying few bags when traveling
  • noun
  • A source of energy that makes a room or area bright
  • Way in which something or someone is understood
  • verb
  • To cause something to burn; put a burning match to
  • To provide a way to see ahead

anyway

Copy vocabulary

US / ˈeniweɪ /

UK / ˈɛniˌwe /

A1
  • adverb
  • A word used to change the topic of a conversation

object

Copy vocabulary

US / 'ɒbdʒɪkt /

UK / ˈɑbdʒɪkt /

A2
  • noun
  • Something you can see or touch, but is not alive
  • Goal or purpose of a particular plan or activity
  • The thing that the action of a verb acts upon
  • verb
  • To disagree; to protest against an idea or plan

infinitesimal

Copy vocabulary

US / ˌɪnfɪnɪˈtesɪml /

UK / ˌɪnfɪnɪˈtɛsəməl /

C1
  • adjecitve
  • Infinitely or immeasurably small

now

Copy vocabulary

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

towards

Copy vocabulary

US / tə'wɔ:dz /

UK / 'təuədz, twɔ:dz /

A1
  • preposition
  • In the direction of someone or something

nearly

Copy vocabulary

US / ˈniəli /

UK / ˈnɪrli /

A1
  • adverb
  • Not completely; almost

can

Copy vocabulary

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

effect

Copy vocabulary

US / ɪ'fekt /

UK / ɪˈfɛkt /

A1
  • noun
  • An advantage, benefit
  • Change brought about by a cause; result

tiny

Copy vocabulary

US / 'taɪnɪ /

UK / ˈtaɪni /

A2
  • adjecitve
  • Very, very small

same

Copy vocabulary

US / seɪm /

UK / sem /

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

whole

Copy vocabulary

US / həul /

UK / hol /

A1
  • adjecitve
  • Complete or full; all of
  • Being in a good condition
  • noun
  • Complete amount or sum; total

radio

Copy vocabulary

US / ˈreɪdiəʊ /

UK / ˈreɪdioʊ /

A2
  • adjecitve
  • Concerning the broadcasting of sound
  • noun
  • System of sending/receiving signals through air
  • Device to listen to broadcast programs, messages
  • verb
  • To broadcast a message to be heard by radio

not

Copy vocabulary

US / nɒt /

UK / nɑt /

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

good

Copy vocabulary

US / ɡʊd /

UK / ɡʊd /

A1
  • adjecitve
  • Proper, appropriate or right
  • (Of an amount) enough; plenty
  • Excellent; high quality
  • Acting well or properly; of moral character
  • In a positive or happy emotional state
  • noun
  • Advantage or benefit

expansion

Copy vocabulary

US / ɪkˈspænʃn /

UK / ɪkˈspænʃən /

B2
  • noun
  • Making or becoming larger

but

Copy vocabulary

US / bət /

UK / bʌt,bət /

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

really

Copy vocabulary

US / ˈri:əli /

UK / ˈriəˌli, ˈrili /

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

blue

Copy vocabulary

US / blu: /

UK / blu /

A1
  • adjecitve
  • Color of the clear sky
  • Feeling sad or down

usually

Copy vocabulary

US / ˈju:ʒuəli /

UK / ˈjuːʒuəli /

A1
  • adverb
  • Normally; regularly

currently

Copy vocabulary

US / ˈkʌrəntli /

UK / ˈkʌrənt(ə)li /

A2
  • adverb
  • Happening or being in the present time

bang

Copy vocabulary

US / bæŋ /

UK / bæŋ /

A2
  • noun
  • Sudden loud noise, as when a bomb explodes
  • A loud noise
  • verb
  • To strike something loudly or forcefully

similar

Copy vocabulary

US / ˈsɪmələ(r) /

UK / ˈsɪməlɚ /

A1
  • adjecitve
  • Nearly the same; alike

place

Copy vocabulary

US / pleɪs /

UK / ples /

A1
  • noun
  • Particular location, area or region
  • verb
  • To put someone in a particular type of situation
  • To put something in a certain location or position

right

Copy vocabulary

US / raɪt /

UK / raɪt /

A1
  • adjecitve
  • Correct or true
  • The south side of you looking at the rising sun
  • adverb
  • Exactly in a place or time
  • Being appropriate for a particular event
  • In a straight or direct manner
  • noun
  • Something you are legally or morally allowed to do
  • Ideal of what is just and good
  • Political view based on conservatism
  • verb
  • To fix something previously wrong or unjust
  • To make upright, as a boat that has turned over

house

Copy vocabulary

US / haʊs /

UK / haʊs /

A1
  • noun
  • Place where a specific activity or business occurs
  • Building in which a family, person lives
  • verb
  • To give someone a place to live
  • To contain or store something

essentially

Copy vocabulary

US / ɪˈsenʃəli /

UK / ɪˈsenʃəli /

A2
  • adverb
  • Basically; (said when stating the basic facts)

first

Copy vocabulary

US / fɜ:st /

UK / fɚst /

A1
  • adjecitve
  • 1st; Coming before all others in time or place
  • noun
  • Something that has not happened before
  • Position of the winner of a competition

extrapolation

Copy vocabulary

US / ɪkˌstræpə'leɪʃn /

UK / ɪkˌstræpəˈleʃən /

C1
  • noun
  • Using facts to make guesses, opinions

get

Copy vocabulary

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

what

Copy vocabulary

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

second

Copy vocabulary

US / 'sekənd /

UK / ˈsɛkənd /

A1
  • adjecitve
  • 2nd; the one following first
  • noun
  • Unit of time; one sixtieth of a minute
  • Short period of time that you wait for someone
  • (Do) soon

that

Copy vocabulary

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’

people

Copy vocabulary

US / 'pi:pl /

UK / ˈpipəl /

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

like

Copy vocabulary

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

independent

Copy vocabulary

US / ˌɪndɪˈpendənt /

UK / ˌɪndɪˈpɛndənt /

A2
  • adjecitve
  • Making your own decisions; acting by yourself
  • noun
  • A person not connected to a political party

different

Copy vocabulary

US / ˈdɪfrənt /

UK / ˈdɪfrənt /

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

about

Copy vocabulary

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)

then

Copy vocabulary

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

must

Copy vocabulary

US / məst /

UK / mʌst /

A1
  • noun
  • Something that is necessary or required
  • other
  • (Used to state that something ought to be true)
  • Used to say something is required or necessary

yeah

Copy vocabulary

US / jeə /

UK / ˈjɛə, ˈjæə, jɛ- /

A1
  • exclamation
  • Another way of saying 'yes'

happen

Copy vocabulary

US / 'hæpən /

UK / ˈhæpən /

A1
  • verb
  • To take place or occur

example

Copy vocabulary

US / ɪgˈzɑ:mpl /

UK / ɪɡˈzæmpəl /

A1
  • noun
  • Thing, person which represents a category

each

Copy vocabulary

US / i:tʃ /

UK / itʃ /

A1
  • determiner
  • Every one of two or more things
  • pronoun
  • Per one person or thing

mean

Copy vocabulary

US / mi:n /

UK / min /

A1
  • adjecitve
  • Being good at
  • Nasty; unkind
  • Not liking to spend money; cheap; stingy
  • noun
  • Average of a set of numbers
  • verb
  • To express a particular idea or thought
  • To intend to do something in particular
  • To have a particular meaning or value

expand

Copy vocabulary

US / ɪk'spænd /

UK / ɪkˈspænd /

A2
  • verb
  • To make something larger in size, number, amount

enough

Copy vocabulary

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

energy

Copy vocabulary

US / 'enədʒɪ /

UK / ˈɛnədʒi /

A2
  • noun
  • Physical or mental strength

conclusion

Copy vocabulary

US / kənˈklu:ʒn /

UK / kənˈkluʒən /

A2
  • noun
  • End of something; finish
  • Judgment or opinion after thinking for a while
  • Opinion or final judgment at end of book, essay

tell

Copy vocabulary

US / tel /

UK / tɛl /

A1
  • verb
  • To (strongly) advise a person to do something
  • To be able to guess
  • To say or communicate information to someone
  • To inform, but without speaking; indicate
  • To have a negative effect on someone
  • To order someone to do something; command
  • To recognize something based on certain signs
  • To report something to an authority
  • To explain something or teach someone something

lot

Copy vocabulary

US / lɒt /

UK / lɑt /

A1
  • noun
  • What happens to a person in life from chance; fate
  • A group of people seen together
  • Item for sale at an auction
  • Small area of land used for a purpose e.g. parking

galaxy

Copy vocabulary

US / 'ɡæləksɪ /

UK / ˈɡæləksi /

B2
  • noun
  • A group of stars and planets in space

extrapolate

Copy vocabulary

US / ɪk'stræpəleɪt /

UK / ɪkˈstræpəˌlet /

C1
  • verb
  • To use facts to make guesses, opinions

back

Copy vocabulary

US / bæk /

UK / bæk /

A1
  • adjecitve
  • Farthest from the front e.g. in a classroom
  • adverb
  • Have returned to a place you were before
  • noun
  • The part of a chair that the upper body leans upon
  • Location at the rear of something
  • The reverse of side something
  • Area on the rear of your body
  • verb
  • To bet money on something
  • To go backwards in a car
  • To support and encourage someone or some cause

and

Copy vocabulary

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

squeeze

Copy vocabulary

US / skwi:z /

UK / skwiz /

C1
  • noun
  • Amount of liquid from firmly pressing e.g. orange
  • Act of putting pressure on, as to get liquid out
  • When there is not enough space for things/people
  • Act of firmly pressing on two or more sides
  • verb
  • To force or threaten someone to give you something
  • To strongly compress something to get liquid out
  • To be pressed together or crowded into an area
  • To press together the opposite sides of something
  • To reduce the amount of something

observe

Copy vocabulary

US / əbˈzɜ:v /

UK / əbˈzɜ:rv /

A2
  • verb
  • To celebrate a particular holiday/religious event
  • To obey or follow laws, rules, or customs
  • To watch carefully; to make a comment

come

Copy vocabulary

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

arrive

Copy vocabulary

US / əˈraɪv /

UK / əˈraɪv /

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

out

Copy vocabulary

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

hot

Copy vocabulary

US / hɒt /

UK / hɑ:t /

A1
  • adjecitve
  • Angry or excited
  • Being very good at something
  • Having a high temperature
  • Popular and causing a great deal of excitement
  • Attractive in a sexually exciting way
  • (Of food) very spicy
  • Stolen; dangerous to buy or trade in

from

Copy vocabulary

US / frəm /

UK / frʌm, frɑm,frəm /

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

siren

Copy vocabulary

US / 'saɪrən /

UK / ˈsaɪrən /

B2
  • noun
  • Device that produces loud warning sounds; alarm
  • Woman who attracts men toward danger

two

Copy vocabulary

US / tu: /

UK / tu /

A1
  • number
  • 2

something

Copy vocabulary

US / ˈsʌmθɪŋ /

UK / ˈsʌmθɪŋ /

A1
  • adverb
  • In some degree or measure
  • noun
  • a person or thing of some value or consequence
  • pronoun
  • Thing that is not yet known or named
  • Approximately

nineteen

Copy vocabulary

US / ˌnaɪnˈti:n /

UK / naɪnˈtin /

A1
  • number
  • 19

keep

Copy vocabulary

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

far

Copy vocabulary

US / fɑ:(r) /

UK / fɑr /

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

you

Copy vocabulary

US / jʊ /

UK / ju /

A1
  • pronoun
  • Person someone is speaking or writing to
  • Person or people in general

year

Copy vocabulary

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

nanosecond

Copy vocabulary

US / ˈnænəʊsekənd /

UK / ˈnænəˌsɛkənd /

C2
  • noun
  • One billionth of a second

how

Copy vocabulary

US / haʊ /

UK / haʊ /

A1
  • adjecitve
  • To what degree? in what amount?
  • adverb
  • (Used to explain the way to do something)
  • exclamation
  • For what purpose or reason?
  • (Used to ask someone or something's condition)

kind

Copy vocabulary

US / kaɪnd /

UK / kaɪnd /

A1
  • adjecitve
  • In a caring and helpful manner
  • friendly and considerate
  • noun
  • One type of thing

also

Copy vocabulary

US / 'ɔ:lsəʊ /

UK / ˈɔlso /

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

one

Copy vocabulary

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

other

Copy vocabulary

US / 'ʌðə(r) /

UK / ˈʌðər /

A1
  • adjecitve
  • A thing different from that mentioned
  • determiner
  • (Something) else; not the first (one)
  • pronoun
  • Being the one and only thing of that category

into

Copy vocabulary

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

theme

Copy vocabulary

US / θi:m /

UK / θim /

A2
  • noun
  • An main or dominant idea, motif
  • Main idea of a work of art, writing, or music
  • Main subject being discussed or described

the

Copy vocabulary

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

stretch

Copy vocabulary

US / stretʃ /

UK / strɛtʃ /

A2
  • noun
  • Making arm, leg muscles longer to ease them
  • A consecutive row of things
  • A period of time
  • verb
  • To make your arm, leg muscles long to ease them
  • To make something bigger by pulling on it

big

Copy vocabulary

US / bɪɡ /

UK / bɪɡ /

A1
  • adjecitve
  • Popular
  • Serious
  • Large

this

Copy vocabulary

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

fourteen

Copy vocabulary

US / ˌfɔ:ˈti:n /

UK / fɔrˈtin /

A1
  • number
  • 14

universe

Copy vocabulary

US / ˈju:nɪvɜ:s /

UK / ˈjunəˌvɚs /

B2
  • noun
  • All of space that contains planets and stars
  • Things surrounding a person, affecting their life

make

Copy vocabulary

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

visible

Copy vocabulary

US / ˈvɪzəbl /

UK / ˈvɪzəbəl /

B1
  • adjecitve
  • Can see, easily seen or understood
  • Being obvious or easy to see

able

Copy vocabulary

US / 'eɪbl /

UK / ˈebəl /

A2
  • adjecitve
  • Skilled; good at something
  • Having the ability to do something

state

Copy vocabulary

US / steɪt /

UK / stet /

A1
  • adjecitve
  • Concerning region within a country
  • noun
  • Region within a country, with its own government
  • Situation or condition something is in
  • verb
  • To say; declare as fact

with

Copy vocabulary

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

origin

Copy vocabulary

US / ˈɒrɪdʒɪn /

UK / ˈɔrədʒɪn,ˈɑr- /

A2
  • noun
  • Point at which something begins or is created
  • Country or social group that a person comes from

know

Copy vocabulary

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

hear

Copy vocabulary

US / hɪə(r) /

UK / hɪr /

A1
  • verb
  • To be aware of sound; to perceive with the ear
  • To be told or find out information or facts
  • To consider or listen to a court case

sixty

Copy vocabulary

US / 'sɪkstɪ /

UK / ˈsɪksti /

A1
  • number
  • 60

have

Copy vocabulary

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

wavelength

Copy vocabulary

US / 'weɪvleŋθ /

UK / ˈwevˌlɛŋkθ, -ˌlɛŋθ /

C1
  • noun
  • To have similar feelings
  • The size of a wave

float

Copy vocabulary

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

away

Copy vocabulary

US / ə'weɪ /

UK / əˈwe /

A1
  • adjecitve
  • Not present
  • adverb
  • Disappear completely
  • Doing something with a lot of energy
  • Not here; far from here; in a different direction
  • To a different area, location

singularity

Copy vocabulary

US / ˌsɪŋgjuˈlærəti /

UK / ˌsɪŋɡjəˈlærɪti /

B2
  • noun
  • Quality that makes something unusual or odd

see

Copy vocabulary

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)

low

Copy vocabulary

US / ləʊ /

UK / lo /

A1
  • adjecitve
  • Having a small quantity, supply, or amount
  • Being unhappy or unpleasant in attitude
  • Not high; being near the ground, or bottom
  • (Of a voice, sound) being soft; quiet
  • noun
  • Situation of not having a lot of something

way

Copy vocabulary

US / weɪ /

UK / we /

A1
  • adverb
  • Used to emphasize the amount of something
  • noun
  • Particular aspect of something being thought about
  • One of various choices that could be made
  • Particular existing condition or state
  • (Often long) distance or length of time
  • How something is done
  • Route to go to a place
  • Small street
  • Usual behavior, emotions or habits of someone

move

Copy vocabulary

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

direction

Copy vocabulary

US / də'rekʃn /

UK / dɪˈrɛkʃən, daɪ- /

A2
  • noun
  • When someone tells people what to do
  • Describes the way you are going, e.g. North

ago

Copy vocabulary

US / əˈgəʊ /

UK / əˈgoʊ /

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

show

Copy vocabulary

US / ʃəʊ /

UK / ʃo /

A1
  • noun
  • False display of love, emotion or action
  • An event for displaying or promoting goods
  • Play, opera or theater production
  • Presentation that is broadcast on TV or radio
  • verb
  • To be easily seen or displayed
  • To display your emotions or feelings
  • To let someone see something; display
  • To explain or teach how something is done
  • To lead someone somewhere; point them to something
  • To prove something to be true, correct
  • To reveal or allow something to be seen

space

Copy vocabulary

US / speɪs /

UK / spes /

A1
  • noun
  • Empty area kept for a specific reason, like a car
  • Empty area with nothing in it
  • Area in the sky where the stars are
  • Area between written words on a page
  • verb
  • To make a certain distance or time between

theory

Copy vocabulary

US / ˈθiəri /

UK / ˈθiəri, ˈθɪri /

A2
  • noun
  • Ideas or principles that explain facts or events

both

Copy vocabulary

US / bəuθ /

UK / boθ /

A1
  • determiner
  • Used to refer to two things at the same time
  • pronoun
  • Used to refer to two things at the same time

empty

Copy vocabulary

US / 'emptɪ /

UK / ˈɛmpti /

A1
  • adjecitve
  • Containing nothing; with no contents
  • Without emotions, feelings, meaning or force
  • noun
  • Item, e.g. a bottle, whose contents have been used
  • verb
  • To remove the contents from something

all

Copy vocabulary

US / ɔ:l /

UK / ɔl /

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

very

Copy vocabulary

US / 'verɪ /

UK / ˈvɛri /

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

thirteen

Copy vocabulary

US / ˌθɜ:'ti:n /

UK / θə:ˈtin /

A1
  • number
  • 13

they

Copy vocabulary

US / ðeɪ /

UK / ðe /

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

billion

Copy vocabulary

US / ˈbɪljən /

UK / ˈbɪljən /

A2
  • noun
  • Number 1,000,000,000

between

Copy vocabulary

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

take

Copy vocabulary

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

distant

Copy vocabulary

US / 'dɪstənt /

UK / ˈdɪstənt /

B1
  • adjecitve
  • Unfriendly; cold
  • Existing or happening far away in place or time
  • (Of relationships) not being closely related

red

Copy vocabulary

US / red /

UK / rɛd /

A1
  • adjecitve
  • Being the color of blood

pretty

Copy vocabulary

US / 'prɪtɪ /

UK / ˈprɪti /

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

mid

Copy vocabulary

US / mɪd /

UK / mɪd /

B2
  • adjecitve
  • At (or near) the middle point

dense

Copy vocabulary

US / dens /

UK / dɛns /

B1
  • adjecitve
  • Very thick and difficult to see, get through
  • Hard to understand
  • Uncomprehending; foolish; inconsiderate
  • Subtitles section
  • take me back to the very beginning of the universe, and then after you tell me the story of what, the first second?
  • The first nanosecond?
  • I'll get into the first minute or so, yeah.
  • How the heck do we know what happened in the first minute of the universe, thirteen point eight billion years ago?
  • Okay, okay.
  • So I'll start with the Big Bang Theory.
  • When people talk about the Big Bang Theory, usually what they mean is they're like, oh yeah, I heard the universe was a singularity.
  • It was a tiny infinitesimal point that exploded in all directions.
  • And that's not really what we as astronomers mean when we say the Big Bang Theory.
  • When astronomers say the Big Bang Theory, we actually mean something a lot closer to the theme song of the TV show, The Big Bang Theory.
  • I use this example because it's actually pretty good.
  • In that theme song, it says, the whole universe was in a hot, dense state.
  • Then nearly fourteen billion years ago, expansion started.
  • Then the song goes on to other things, right?
  • that's it.
  • So the Big Bang theory is just the idea that the universe was hot and dense in the beginning.
  • Thirteen point eight billion years ago, it was hot and dense, and it's been expanding and cooling since then.
  • The origin of that theory is the idea that currently the universe is expanding.
  • So, we observe that because we see all the distant galaxies are moving away from us.
  • Essentially, what's happening is that we see the light from all these very, very distant galaxies.
  • That light is being kind of stretched out by the expansion of the universe.
  • So, what that does is it moves it from sort of visible light to infrared light as the wavelength is kind of stretched out.
  • It's a similar effect to if a siren goes past your house and it goes into lower pitch, you know, like that.
  • The same kind of thing happens with light.
  • When things are moving away from you, they get redder.
  • or to longer wavelengths.
  • When they're moving toward you, they get bluer to shorter wavelengths.
  • And this happens at all the different wavelengths of light, from radio to gamma rays and so on.
  • So anyway, we see that distant galaxies are moving away from us, they're moving away from each other, there's more and more empty space happening all the time, the universe is expanding.
  • It doesn't mean that objects are expanding, it just means that there's empty space in between objects that's expanding.
  • we've known that the expansion is happening.
  • We've known that for a long time, since like the, I guess, the twenties, the nineteen twenties.
  • It's not that long.
  • Well, I mean, since we started being able to know that there are other galaxies, essentially, we started to see that the ones that are far enough away are moving away from us.
  • Right.
  • The conclusion you get from that is that if the universe is expanding now, it must have been smaller in the past.
  • If all those galaxies are getting farther away now, they must have been closer together.
  • If you push things closer together, it makes them hotter, it makes them denser.
  • You can squeeze things and they get hot and dense.
  • And so you can just kind of extrapolate and say, well, the beginning of the universe, things must have been hot and dense and really close together, right?
  • And then you kind of keep going with that extrapolation.
  • You arrive at the idea that the universe was this kind of hot, dense soup of energy in the very beginning.
  • And that idea has been around for a long time.
  • It's been kind of floated in different ways.
  • And the kind of confirmation of that came in the mid sixties when we started to actually see the light of that hot, dense soup.
  • So we know that the universe is expanding both because we can tell that galaxies are getting further away from us, but also because we can glimpse this hot, dense soup that the universe was at the very beginning.
  • So we have two independent ways
  • of knowing that the universe used to be a hot, dense place.