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Gravitation: The Four Fundamental Forces of Physics #3

Video vocabulary

correctly

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US / kə'rektlɪ /

UK / kəˈrɛktlɪ /

A2
  • adverb
  • In an accurate or correct manner

its

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US / ɪts /

UK / ɪts /

A1
  • adjecitve
  • Referring to or belonging to ‘it’
  • determiner
  • Of something; belonging or related to something
  • other
  • Possessive form of “it”

space

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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

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US / ˈθiəri /

UK / ˈθiəri, ˈθɪri /

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

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

curve

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US / kə:v /

UK / kɚv /

A2
  • noun
  • Smooth rounded line that is not straight
  • verb
  • To make something bend into a rounded shape

everything

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US / 'evrɪθɪŋ /

UK / ˈɛvriˌθɪŋ /

A1
  • pronoun
  • All of the things mentioned

envision

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US / ɪnˈvɪʒn /

UK / ɪnˈvɪʒn /

C2
  • verb
  • To imagine or picture in your mind

graviton

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US / 'grævɪtɒn /

UK / 'grævəˌtɒn /

A1
  • noun
  • Gauge boson that mediates the (extremely weak) gravitational interactions between particles

they

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US / ðeɪ /

UK / ðe /

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

else

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US / els /

UK / ɛls /

A1
  • adverb
  • Otherwise; if you fail to
  • (Of person place thing etc.) besides; in addition

huge

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US / hju:dʒ /

UK / hjudʒ /

A2
  • adjecitve
  • Very very large

newtonian

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US / njuːˈtəʊniən /

UK / nuˈtoʊniən /

A1
  • other
  • A follower of Isaac Newton
  • Of or relating to or inspired by Sir Isaac Newton or his science

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

useful

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US / ˈju:sfl /

UK / ˈjusfəl /

A1
  • adjecitve
  • That can help with a particular task

way

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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

movement

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US / ˈmu:vmənt /

UK / ˈmuvmənt /

A2
  • noun
  • Part of a piece of classical music
  • Group with a shared interest or goal
  • Group sharing the same idea to change society, art
  • Action you do when exercising, e.g. in a gym
  • Part of a piece of music

relativity

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US / ˌreləˈtɪvəti /

UK / ˌrɛləˈtɪvɪti /

C2
  • noun
  • Einstein theory about time, space and position

work

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US / wɜ:k /

UK / wɚk /

A1
  • adjecitve
  • Activity completed in order to make money
  • noun
  • The product of some artistic or literary endeavor
  • Everything created by an author, artist, musician
  • Activity you do in order to make money
  • Place of employment
  • Final product or result of a some labor or effort
  • verb
  • To bring into a specific state of success
  • To be functioning properly, e.g. a car
  • To do your job in your company or workplace
  • To make an effort to do something
  • To operate a machine or device

discover

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US / dɪˈskʌvə(r) /

UK / dɪˈskʌvɚ /

A2
  • verb
  • To find something new that was not known before

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

effectively

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US / ɪˈfektɪvli /

UK / ɪˈfɛktɪvli /

B1
  • adverb
  • In a way that produces the desired result

einstein

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US / ˈaɪn.staɪn /

UK / ˈaɪn.staɪn /

A1
  • noun
  • Albert Einstein, a German-born theoretical physicist

general

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US / 'dʒenrəl /

UK / ˈdʒɛnərəl /

A1
  • adjecitve
  • Widespread, normal or usual
  • noun
  • Top ranked officer in the army

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

other

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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

strength

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US / streŋθ /

UK / strɛŋkθ, strɛŋθ, strɛnθ /

A2
  • noun
  • Condition of being strong

than

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US / ðən /

UK / ðən /

A1
  • conjunction
  • Used to compare two things that are not equal

predict

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US / prɪ'dɪkt /

UK / prɪˈdɪkt /

A2
  • verb
  • To guess or estimate what will or might happen

also

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US / 'ɔ:lsəʊ /

UK / ˈɔlso /

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

depression

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US / dɪ'preʃn /

UK / dɪˈprɛʃən /

B2
  • noun
  • Medical condition of a lack of vitality
  • Period of unemployment and low economic activity

how

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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)

you

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US / jʊ /

UK / ju /

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

pion

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US / ˈpaɪˌɑn /

UK / /

A1
  • noun
  • Meson involved in holding the nucleus together; produced as the result of high-energy particle colli

fruit

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US / fru:t /

UK / frut /

A1
  • noun
  • Result or product of something
  • Food that grows on a tree or bush, usually sweet
  • verb
  • To grow e.g. apples, bananas, as a plant or a tree

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

below

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US / bɪ'ləʊ /

UK / bɪˈlo /

A1
  • preposition
  • In a lower position, place, or level

convey

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US / kən'veɪ /

UK / kənˈve /

B1
  • verb
  • To carry or transport something
  • To make aware or tell others information
  • Law to transfer property legally between people

body

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US / ˈbɒd.i /

UK / ˈbɑdi /

A1
  • noun
  • An object distinct from other objects
  • A group of people involved in an activity together
  • Main part of something
  • A person's physical self

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

theoretical

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US / ˌθɪəˈretɪkl /

UK / ˌθiəˈrɛtɪkəl /

B1
  • adjecitve
  • Concerning the unproved aspects of a subject

universe

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US / ˈju:nɪvɜ:s /

UK / ˈjunəˌvɚs /

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

treat

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US / tri:t /

UK / trit /

A1
  • noun
  • Something you buy for others as a surprise present
  • something that tastes good and that is not eaten often
  • verb
  • To pay for the food or enjoyment of someone else
  • To use medical methods to try to cure an illness
  • To act in a certain way toward someone

youtube

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US / 'ju:tju:b /

UK / 'ju:tu:b /

A1
  • transitive verb
  • Upload a video of (someone or something) to the video-sharing website YouTube.

able

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US / 'eɪbl /

UK / ˈebəl /

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

term

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US / tɜ:m /

UK / tɚm /

A1
  • noun
  • Conditions applying to an agreement, contract
  • Length of time something is expected to happen
  • Fixed period of weeks for learning at school
  • The (precise) name given to something
  • verb
  • To call; give a name to

welcome

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US / 'welkəm /

UK / ˈwɛlkəm /

A1
  • adjecitve
  • Being what was wanted or needed
  • noun
  • Friendly greeting to someone who has arrived
  • verb
  • To greet someone who has just arrived
  • To accept or receive something happily and gladly

gravitation

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US / ˌɡrævɪ'teɪʃn /

UK / ˌɡrævɪˈteʃən /

C1
  • noun
  • Movement toward something attractive

complicated

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US / 'kɒmplɪkeɪtɪd /

UK / ˈkɑmplɪˌketɪd /

B1
  • adjecitve
  • Difficult to do, understand or use
  • verb
  • To make more difficult to do, understand or use

gravitational

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US / ˌgrævɪˈteɪʃənl /

UK / ˌɡrævɪˈteɪʃənl /

C1
  • adjecitve
  • Concerning the force of gravity

neptune

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US / ˈneptju:n /

UK / ˈnɛpˌtun, -ˌtjun /

A1
  • other
  • A giant planet with a ring of ice particles; the th planet from the sun is the most remote of the ga

particle

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US / ˈpɑ:tɪkl /

UK / ˈpɑrtɪkəl /

B1
  • noun
  • Adverb or preposition that joins with a verb
  • Tiny piece or quantity of something

massive

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US / ˈmæsɪv /

UK / ˈmæsɪv /

B1
  • adjecitve
  • Very big; large; too big

respond

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US / rɪ'spɒnd /

UK / rɪˈspɑnd /

A2
  • verb
  • To answer something or someone
  • To have a good reaction to e.g. medical treatment

series

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US / ˈsɪəri:z /

UK / ˈsɪriz /

A1
  • noun
  • Set of stories or articles on a particular subject
  • other
  • Number of things that happen one after another

should

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US / ʃʊd /

UK / ʃʊd /

A1
  • other
  • Used to indicate what is proper or reasonable

carrier

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US / ˈkæriə(r) /

UK / ˈkæriɚ /

A2
  • noun
  • A company, e.g. mail, airline, that carries things
  • Someone with a disease who gives it to another
  • someone who does not suffer from a disease but has the infection or genetic fault that causes it and

explain

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US / ɪk'spleɪn /

UK / ɪkˈsplen /

A1
  • verb
  • To make clear or easy to understand by describing

point

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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

albert

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US / ˈælbət /

UK / ælˈbɚt /

A1
  • noun
  • Prince consort of Queen Victoria of England

appear

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US / ə'pɪə(r) /

UK / əˈpɪr /

A1
  • verb
  • To be seen, become visible; come into sight
  • To seem to be
  • To act in a play, movie, or be mentioned in media

describe

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US / dɪ'skraɪb /

UK / dɪˈskraɪb /

A1
  • verb
  • To tell the appearance, sound, smell of something

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

available

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US / əˈveɪləbl /

UK / əˈveləbəl /

A1
  • adjecitve
  • Present and able to be used
  • Able to be used at a scheduled time

either

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US / ˈaɪðə(r) /

UK / ˈiðɚ, ˈaɪðɚ /

A1
  • adjecitve
  • One of two (used when there is a choice of two)
  • adverb
  • (After negative statements) likewise, in addition
  • conjunction
  • Used as the first of two connected things
  • determiner
  • Used as the first of two connected things
  • pronoun
  • The one or the other

perihelion

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US / ˌperɪˈhiːlɪən /

UK / ˌperɪˈhilɪən /

A1
  • noun
  • Periapsis in solar orbit; the point in the orbit of a planet or comet where it is nearest to the sun

four

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US / fɔ:(r) /

UK / fɔr, for /

A1
  • number
  • 4

gravity

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US / ˈgrævəti /

UK / ˈɡrævɪti /

B1
  • noun
  • (Of a situation) extreme seriousness
  • Force making things fall towards the ground

probably

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US / ˈprɒbəbli /

UK / ˈprɑbəbli /

A1
  • adverb
  • That is likely to happen or be true

actually

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US / ˈæktʃuəli /

UK / ˈæktʃuəli /

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

gluons

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US / /

UK / /

A1
  • other
  • Gauge boson that mediates strong interaction among quarks

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

notice

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US / 'nəʊtɪs /

UK / ˈnotɪs /

A1
  • noun
  • Time by when you must leave, e.g. if you are fired
  • Paper with an announcement, e.g. pinned to a board
  • verb
  • To become aware by sight, touch, or hearing

sun

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US / sʌn /

UK / sʌn /

A1
  • noun
  • Light and heat coming from a large star in the sky
  • Hot shining star the Earth moves around
  • verb
  • To lie in the sunshine and enjoy its warmth

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

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

enjoy

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US / ɪnˈdʒɔɪ /

UK / ɛnˈdʒɔɪ /

A1
  • verb
  • To take pleasure in something

hole

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US / həʊl /

UK / hol /

A2
  • noun
  • An empty space, as in the ground, in a sock etc.
  • Fault or weakness in a plan, idea or explanation
  • Opening into or through something
  • An awkward or difficult situation
  • Dirty or unpleasant place with poor facilities
  • verb
  • (Golf) to get the ball into the hole

mattress

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US / 'mætrəs /

UK / ˈmætrɪs /

B2
  • noun
  • Thick soft part of a bed that you lie on

accelerate

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US / əkˈseləreɪt /

UK / ækˈsɛləˌret /

B1
  • verb
  • To cause to occur earlier than expected
  • To increase the speed or rate of something

his

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US / hɪz /

UK / hɪz /

A1
  • pronoun
  • Something belonging to a male person

instance

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US / 'ɪnstəns /

UK / ˈɪnstəns /

A2
  • noun
  • An example of something; case
  • verb
  • To give as an example of something else

orbit

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US / 'ɔ:bɪt /

UK / ˈɔrbɪt /

B2
  • noun
  • Path an object takes as it circles another object
  • verb
  • To go around another object (often in space)

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

newton

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US / ˈnju:tən /

UK / ˈnu:tən /

A1
  • noun
  • A unit of force equal to the force that imparts an acceleration of m, sec, sec to a mass of kilogram

twitter

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US / ˈtwɪtə(r) /

UK / ˈtwɪtɚ /

C2
  • noun
  • An online messaging system
  • verb
  • To make small chattering sounds, like some birds

classical

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US / ˈklæsɪkl /

UK / ˈklæsɪkəl /

B1
  • adjecitve
  • Concerning the culture of ancient Greece or Rome
  • (Of music) serious and traditional in form
  • Concerning ideas considered to be traditional

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

fall

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US / fɔ:l /

UK / fɔl /

A1
  • noun
  • Season after summer and before winter; Autumn
  • A drop in amount; decrease
  • Dropping from a standing position to the ground
  • verb
  • To drop in amount; to decrease
  • To come down from a higher position suddenly
  • To go from standing to the ground, by accident

remember

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US / rɪ'membə(r) /

UK / rɪˈmɛmbɚ /

A1
  • verb
  • To give someone a gift, e.g. birthday, wedding
  • To hold a thought in your mind to not forget it
  • To bring a previous image or idea to your mind

universal

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US / ˌju:nɪˈvɜ:sl /

UK / ˌjunəˈvɚsəl /

A2
  • adjecitve
  • Existing in all places at all times for all people
  • Done or experienced by everyone
  • noun
  • Things which apply equally to everyone

fundamental

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US / ˌfʌndəˈmentl /

UK / ˌfʌndəˈmɛntl /

A2
  • adjecitve
  • Forming a necessary part, base, or core
  • noun
  • A basic part of something
  • (Music) the lowest note in a harmony

handiwork

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US / ˈhændiwɜ:k /

UK / ˈhændiˌwə:k /

C1
  • noun
  • Making something by hand labor or your own efforts

rapidly

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US / 'ræpɪdlɪ /

UK / ˈræpɪdlɪ /

B1
  • adverb
  • With great speed; quickly

mass

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US / mæs /

UK / mæs /

B1
  • noun
  • Religious ceremony in some Christian churches
  • Large amount or number of something
  • Main or largest part of something
  • Large number of people considered as a whole
  • Amount of matter that an object has
  • verb
  • To gather people or things into a large group

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)

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

attractive

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US / əˈtræktɪv /

UK / əˈtræktɪv /

A2
  • adjecitve
  • Making you like them, as by being good-looking

for

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US / fə(r) /

UK / fɔr,fə /

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

time

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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

energetic

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US / ˌenəˈdʒetɪk /

UK / ˌɛnɚˈdʒɛtɪk /

A2
  • adjecitve
  • Possessing, exerting or displaying energy

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

depend

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US / dɪˈpend /

UK / dɪˈpend /

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

compact

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US / 'kɒmpækt /

UK / kəmˈpækt /

B1
  • adjecitve
  • Packed closely together
  • noun
  • Small case with face powder and a mirror
  • verb
  • To pack something closely or tightly

object

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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

massless

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US / ˈmæslɪs /

UK / ˈmæsləs /

A1

question

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US / 'kwestʃən /

UK / ˈkwɛstʃən /

A1
  • noun
  • Issue or problems you are dealing with
  • What you ask about; issue
  • verb
  • To ask for or try to get information
  • To have or express concerns or uncertainty

steroid

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US / ˈsterɔɪd /

UK / ˈstɪrˌɔɪd, ˈstɛr- /

B2
  • noun
  • Drug making muscles bigger and giving more energy

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

light

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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

stuff

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US / stʌf /

UK / stʌf /

A1
  • noun
  • Generic description for things, materials, objects
  • verb
  • To push material inside something, with force

though

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US / ðəu /

UK / ðo /

A1
  • adverb
  • Although, despite the fact that

black

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US / blæk /

UK / blæk /

A1
  • adjecitve
  • Color of the sky on a dark night
  • noun
  • A person with dark skin, often of African origin
  • Person's name
  • verb
  • To fill in something to make it a very dark color

never

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US / 'nevə(r) /

UK / ˈnɛvɚ /

A1
  • adverb
  • Not ever; not at any time

spacetime

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US / s'peɪstaɪm /

UK / s'peɪstaɪm /

A1
  • noun
  • The concepts of time and three-dimensional space regarded as fused in a four-dimensional continuum.

distance

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US / 'dɪstəns /

UK / ˈdɪstəns /

A2
  • noun
  • Lack of friendliness toward another person
  • Amount of space between two places or things
  • verb
  • To make it clear that you are not involved

observe

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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

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

unobservable

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US / ʌnəbˈzɜːvəb(ə)l /

UK / /

B1
  • adjecitve
  • Not capable of being seen by the human eye

from

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US / frəm /

UK / frʌm, frɑm,frəm /

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

form

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US / fɔ:m /

UK / fɔrm /

A1
  • noun
  • Sports team or person's current winning record
  • Document you complete when making an application
  • Visible shape or style; type; kind
  • verb
  • To organize something such as a club or group
  • To develop; to come into a shape or substance
  • To make something into a particular shape

escape

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US / ɪ'skeɪp /

UK / ɪˈskep /

A2
  • noun
  • Act to briefly ignoring boring or bad things
  • The 'esc key' on a keyboard
  • Act of getting away from where you are being kept
  • verb
  • To avoid something undesirable, dangerous or bad
  • To get away from a place where you are being kept
  • (Gas, water) to come out from a pipe, container
  • To not to be noticed or remembered by someone

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

back

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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

base

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US / beɪs /

UK / bes /

A2
  • noun
  • Place military personnel live, train, and operate
  • Bottom part of an object that touches a surface
  • Unit of counting, e.g. 10 for counting
  • Most important idea or ingredient to add others
  • Origin or start from which something came
  • Main place where an organization or a person works
  • verb
  • To use as the starting point or origin for
  • To have as the main location for (company, etc.)

hope

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US / həʊp /

UK / hop /

A1
  • noun
  • When you wish something will happen; what you wish
  • verb
  • To expect and want something to happen

galaxy

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US / 'ɡæləksɪ /

UK / ˈɡæləksi /

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

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

goodbye

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US / ˌɡʊd'baɪ /

UK / ˌɡʊd'baɪ /

A1
  • noun
  • Something you say when you leave someone

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

uranus

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US / ˈjʊərənəs /

UK / ˈjʊrənəs, jʊˈrenəs /

A1
  • other
  • A giant planet with a ring of ice particles; the th planet from the sun has a blue-green color and m

another

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US / əˈnʌðə(r) /

UK / əˈnʌðɚ /

A1
  • adjecitve
  • One more, but not this
  • determiner
  • One more added
  • pronoun
  • One more (thing)

detect

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US / dɪˈtekt /

UK / dɪˈtɛkt /

A2
  • verb
  • To discover or identify the presence of something

only

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US / ˈəunli /

UK / ˈonli /

A1
  • adverb
  • Just one; just that amount or thing; not more than
  • Not very important or serious
  • Just that type of thing, person
  • Short time ago; not before a certain time
  • conjunction
  • Except; but

two

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US / tu: /

UK / tu /

A1
  • number
  • 2

action

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US / 'ækʃn /

UK / ˈækʃən /

A2
  • noun
  • Something that a person or thing does
  • verb
  • To act to do something

distort

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US / dɪ'stɔ:t /

UK / dɪˈstɔrt /

B1
  • verb
  • To change the shape, appearance, or sound
  • To exaggerate the truth or fact, e.g. to deceive

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

essentially

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US / ɪˈsenʃəli /

UK / ɪˈsenʃəli /

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

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

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

witness

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US / 'wɪtnəs /

UK / ˈwɪtnɪs /

B1
  • noun
  • Person who was present to see an event take place
  • Evidence or proof of something
  • verb
  • To see the signing of an official document
  • To see an event take place (usually a crime)
  • To serve as an example or evidence of something

cause

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US / kɔ:z /

UK / kɔz /

A2
  • noun
  • Belief, goal or organization that people support
  • Reason for
  • verb
  • To make something happen; create effect or result

understanding

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US / ˌʌndəˈstændɪŋ /

UK / ˌʌndərˈstændɪŋ /

A1
  • adjecitve
  • Being sympathetic
  • noun
  • When you get the meaning correctly; comprehension
  • Knowledge about something or someone
  • verb
  • To know the meaning of language, what someone says

mercury

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US / ˈmɜ:kjəri /

UK / ˈmɜ:rkjəri /

A1
  • noun
  • Silver-white metal that is used in thermometers
  • Planet that is closest to the sun

square

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US / skweə(r) /

UK / skwɛr /

A2
  • adjecitve
  • Being fair or honest
  • Multiply a number by itself e.g. 2x2 or 6x6
  • noun
  • Shape with 4 equal length sides and 4 equal angles
  • The result of multiplying Length by the width
  • Open public area in the middle of the town
  • verb
  • To make something balance or be equal
  • To multiply a number by itself, e.g. 2x2 or 6x8
  • To straighten the edge to form a four-sided shape

comment

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US / 'kɒment /

UK / ˈkɑmɛnt /

A2
  • noun
  • Something you say, giving an opinion; remark
  • verb
  • To say something that gives your opinion

down

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US / daʊn /

UK / daʊn /

A1
  • adjecitve
  • Being sad, sick, or unhappy
  • Not operating, working, or functioning as expected
  • adverb
  • In a sitting or lying position
  • Towards or on the ground, floor, or bottom
  • Written or copied onto a piece of paper or book
  • noun
  • A period of play in American Football
  • The soft, smooth hairs that cover a bird's body
  • preposition
  • Along something's path, course, or direction
  • Going from a higher position to a lower position
  • verb
  • To eat or drink very quickly and without stopping

force

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US / fɔ:s /

UK / fɔrs, fors /

A1
  • noun
  • Group of persons trained for military action; army
  • Pressure; attraction
  • The use of physical strength/violence to persuade
  • verb
  • To use physical strength or violence to persuade

must

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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

existence

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US / ɪɡ'zɪstəns /

UK / ɪɡˈzɪstəns /

A2
  • noun
  • State of being present, alive or real

decrease

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US / dɪˈkri:s /

UK / dɪˈkris /

B1
  • noun
  • Amount by which something has been reduced
  • verb
  • To reduce the size, amount or number of something

each

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US / i:tʃ /

UK / itʃ /

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

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

bend

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US / bend /

UK / bɛnd /

A2
  • noun
  • When a road changes direction; turn
  • verb
  • To become curved or no longer straight
  • To move your body so that it is not straight up
  • To turn in a different direction, as a road
  • To use force to make an object not straight

attract

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US / ə'trækt /

UK / əˈtrækt /

A2
  • verb
  • To make something move closer using magnetic force
  • To make someone notice and become interested in

case

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US / keɪs /

UK / kes /

A1
  • noun
  • Container used to carry things, e.g. clothes
  • Set of facts about a crime
  • Set of facts about an event
  • Example or instance of something
  • verb
  • To find out about a place, as in planning to steal

energy

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US / 'enədʒɪ /

UK / ˈɛnədʒi /

A2
  • noun
  • Physical or mental strength

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

great

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US / ɡreɪt /

UK / ɡret /

A1
  • adjecitve
  • Very large in size
  • Very important
  • Very good; fantastic; wonderful
  • adverb
  • Very good; better than before
  • noun
  • Successful and well-admired person

mean

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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

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

attraction

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US / ə'trækʃn /

UK / əˈtrækʃən /

A2
  • noun
  • Theme park or fairground; place worth visiting
  • The act of making someone become interested in

exert

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US / ɪgˈzɜ:t /

UK / ɪgˈzɜ:rt /

B2
  • verb
  • To make something have an effect on something else

towards

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US / tə'wɔ:dz /

UK / 'təuədz, twɔ:dz /

A1
  • preposition
  • In the direction of someone or something

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

carry

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US / ˈkæri /

UK / ˈkæri /

A1
  • verb
  • To have a child, be pregnant
  • To have a disease you might give to others
  • (Of stores) to sell a particular product
  • To hold something and move it to another place
  • To travel a long distance (sound)
  • To support the weight or burden of something

facebook

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US / 'feɪsbʊk /

UK / 'feɪsbʊk /

A1
  • intransitive verb
  • Spend time using the social media application Facebook.

proportional

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US / prəˈpɔ:ʃənl /

UK / prəˈpɔ:rʃənl /

B1
  • adjecitve
  • Having a size appropriate to the size of another

same

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US / seɪm /

UK / sem /

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

physics

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US / ˈfɪzɪks /

UK / ˈfɪzɪks /

A1
  • other
  • The study of heat, light, and energy on objects

tiny

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US / 'taɪnɪ /

UK / ˈtaɪni /

A2
  • adjecitve
  • Very, very small

fabric

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US / ˈfæbrɪk /

UK / ˈfæbrɪk /

B1
  • noun
  • Cloth or material
  • Basic structure

law

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US / lɔ: /

UK / lɔ /

A1
  • noun
  • Field of study that relates to the legal profession
  • A rule made and enforced by a government
  • System or rules made by the government

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

planet

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US / 'plænɪt /

UK / ˈplænɪt /

A2
  • noun
  • One of the bodies that orbit the sun

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

relationship

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US / rɪˈleɪʃnʃɪp /

UK / rɪˈleʃənˌʃɪp /

A2
  • noun
  • Connection between two or more people or things
  • Way people interact or live with each other
  • Romantic or loving friendship between two people

warp

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US / wɔ:p /

UK / wɔ:rp /

B2
  • noun
  • Twist or bend in something normally straight
  • Threads that go up and down on a loom, for weaving
  • verb
  • To influence someone to become bad/do evil thing
  • To become twisted out of natural or intended shape

apply

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US / ə'plaɪ /

UK / əˈplaɪ /

A1
  • verb
  • To spread a substance or liquid over a surface
  • To commit your time and effort to doing something
  • To make something useful in a certain situation
  • To be relevant for a situation
  • To ask formally for (job, permission etc.)

but

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US / bət /

UK / bʌt,bət /

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

generally

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US / /

UK / /

A2
  • adverb
  • Usually; as a rule; by, to or for most people

star

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US / stɑ:(r) /

UK / stɑr /

A1
  • noun
  • Very famous person, usually an entertainer
  • Someone who does something very well
  • Your horoscope
  • A bright planet of hot gas in the night sky
  • A 5-6 sided asterisk-shape
  • verb
  • To perform or play a main role in a movie, play
  • To do something very well
  • To mark with a 5-6 sided asterisk-shape

really

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US / ˈri:əli /

UK / ˈriəˌli, ˈrili /

A1
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  • Welcome Back to our series on the four fundamental forces of physics.
  • Today we are talking about gravitation, the force that you and I probably have the closest working relationship with.
  • But it's not only what sticks you to the ground, and makes you fall down, it also explains how stars and galaxies form, and it will describe how they die.
  • But even though we can watch it in action, gravitation is much more complicated than it appears.
  • Generally, I think of gravitation in two different ways; the way that Isaac Newton described it, and the way that Albert Einstein described it.
  • In classical Newtonian terms, "gravitation attracts everything in the universe that has mass to everything else in the universe that has mass." And I mean everything from tiny particles to galaxies.
  • It's universal and treats everything the same.
  • But the strength of this attraction depends on the object's masses and the distance between them.
  • The more massive an object, the greater the gravitational force it exerts on another, and the force decreases rapidly the farther apart the two objects are.
  • Isaac described it this way, the force of gravitation is proportional to the product of the object's masses, and inversely proportional to the square of the distance between them.
  • Newton's mass and distance based understanding of gravitation is really useful for stuff like predicting the existence of Uranus based on the movement of Neptune.
  • But it doesn't explain everything.
  • Like Mercury's orbit. The trouble with Mercury is that the point where it's closest to the sun, it's perihelion, isn't where Newton's law predicts.
  • It took an Einstein to explain that.
  • Actually, it took...it took Albert Einstein.
  • Einstein described gravity as a property, not just of mass, but also of space and time.
  • He envisioned spacetime as the fabric of the universe, and his theory of general relativity basically says, that objects that either have mass, or energy distort that fabric.
  • Think of a watermelon and an orange on a mattress.
  • Each makes a depression in the mattress, and if the orange rolls toward the watermelon, it will accelerate as it reaches the depression made by the more massive fruit.
  • The attractive force thus gets weaker or stronger depending on the distance between the fruits.
  • It's like Newton's law on steroids.
  • Gravitation is the warp in space-time created by mass or energy.
  • So in the case of Mercury, the closer it gets to the sun, the more the sun's huge mass curves space-time, which effectively causes that point of perihelion to move.
  • As you'll notice, this applies to objects with mass or energy.
  • Einstein discovered that gravitation could influence energetic but massless stuff like light, if the force is strong enough.
  • For instance, he observed that light bends around really massive planets and stars, and his theory of general relativity predicts correctly that a compact enough mass could distort spacetime so much that light could not escape it.
  • And that, is a black hole.
  • Now remember, that for each fundamental force, there is a particle, a force carrier, that essentially conveys force between bodies.
  • But if light responds to gravitation, its force carrier must be really tiny.
  • Gravitation is described as being carried massless particles, called gravitons, but unlike other force carriers we've talked about, like pions and gluons, gravitons are theoretical.
  • They've never been detected, and they are predicted to be essentially unobservable.
  • We're only able to witness they're handiwork, and that, is gravitation.
  • We hope that you enjoyed our series on the four fundamental forces of physics.
  • If you have questions or ideas for other stuff we should be talking about, we're available on Facebook or Twitter, or in the YouTube comments below.
  • Goodbye.