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

Automatic Chemistry - Periodic Table of Videos

Video vocabulary

solvent

Copy vocabulary

US / ˈsɒlvənt /

UK / ˈsɑ:lvənt /

B2
  • noun
  • Substance used to dissolve or melt others

alter

Copy vocabulary

US / ˈɔ:ltə(r) /

UK / ˈɔltɚ /

A2
  • verb
  • To change so (clothing) fits better

cylinder

Copy vocabulary

US / ˈsɪlɪndə(r) /

UK / ˈsɪləndɚ /

B2
  • noun
  • Tube shape with flat ends

block

Copy vocabulary

US / blɒk /

UK / blɑk /

A2
  • noun
  • Solid piece of material used for building
  • A piece of wood, chocolate etc.
  • Hard piece of wood, stone etc. with straight edges
  • Building made up of offices or apartments
  • Area of a city divided by four streets
  • verb
  • To stop from going forward or making progress

student

Copy vocabulary

US / ˈstju:dnt /

UK / ˈstudnt, ˈstjud- /

A1
  • noun
  • Person studying at school

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

exciting

Copy vocabulary

US / ɪkˈsaɪtɪŋ /

UK / ɪkˈsaɪtɪŋ /

A2
  • adjecitve
  • Creating interest, happiness or pleasurable fear
  • verb
  • To cause a reaction; make active
  • To make someone feel happy, interested or eager

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

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

particularly

Copy vocabulary

US / pəˈtikjuləli /

UK / pɚˈtɪkjələli, pəˈtɪk- /

A2
  • adverb
  • Specially; more than others

boring

Copy vocabulary

US / ˈbɔ:rɪŋ /

UK / ˈbɔrɪŋ, ˈbor- /

A1
  • adjecitve
  • Not at all interesting
  • verb
  • To make a deep hole in the ground with a drill
  • To make someone not interested in something

raise

Copy vocabulary

US / reɪz /

UK / rez /

A1
  • noun
  • Increase in a bet above another when playing cards
  • Pay increase
  • verb
  • To increase a bet above another when playing cards
  • To gather donations for a cause or charity
  • To bring up and educate a child to maturity
  • To bring a dead person to life
  • To increase a quantity, size, intensity or price
  • To lift (e.g. your hand) to a higher position
  • To mention a topic /issue for discussion; bring up
  • To increase (salary, etc.)
  • To grow or care for plants or animals

problem

Copy vocabulary

US / ˈprɒbləm /

UK / ˈprɑbləm /

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

behind

Copy vocabulary

US / bɪˈhaɪnd /

UK / bɪˈhaɪnd /

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

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

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

calculate

Copy vocabulary

US / 'kælkjʊleɪt /

UK / ˈkælkjəˌlet /

B2
  • verb
  • To find an answer using mathematics
  • To make an educated guess about something

group

Copy vocabulary

US / ɡru:p /

UK / ɡrup /

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

honest

Copy vocabulary

US / ˈɒnɪst /

UK / ˈɑnɪst /

A2
  • adjecitve
  • Good, truthful, sincere, or faithful; trustworthy

mixed

Copy vocabulary

US / mɪkst /

UK / mɪkst /

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

process

Copy vocabulary

US / prə'ses /

UK / ˈprɑsˌɛs, ˈproˌsɛs /

A2
  • noun
  • Dealing with official forms in the way required
  • Set of changes that occur slowly and naturally
  • verb
  • To organize and use data in a computer
  • To deal with official forms in the way required
  • To prepare by treating something in a certain way
  • To adopt a set of actions that produce a result
  • To convert by putting something through a machine

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

catalyst

Copy vocabulary

US / ˈkætəlɪst /

UK / ˈkætlɪst /

B2
  • noun
  • Person/thing causing a change or event to happen
  • Substance causing a chemical reaction to speed up

page

Copy vocabulary

US / peɪdʒ /

UK / pedʒ /

A1
  • noun
  • Person's name
  • One side of a sheet of paper
  • (Olden times) boy servant of a king or queen
  • Screen of information on an online service
  • verb
  • To call for someone via a phone or speaker

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)

sample

Copy vocabulary

US / ˈsɑ:mpl /

UK / ˈsæmpl /

A2
  • noun
  • A small quantity of something used as a taster
  • verb
  • To try (e.g. food, drink), to see if you like it

machine

Copy vocabulary

US / mə'ʃi:n /

UK / məˈʃin /

A1
  • noun
  • Piece of equipment used to do work
  • Powerful group who control and organize things
  • verb
  • To shape, work on something, using a device

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

solution

Copy vocabulary

US / səˈlu:ʃn /

UK / səˈluʃən /

A2
  • noun
  • Mix of a liquid and a solid or a gas
  • Way to solve or deal with a problem

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

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

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

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

number

Copy vocabulary

US / ˈnʌmbə(r) /

UK / ˈnʌmbɚ /

A1
  • noun
  • Symbols such as 1, 2, 56, 793
  • Particular song or dance performed during a show
  • Total quantity or amount of things
  • verb
  • To put numbers on things
  • To assign a sequence within a group, series, set
  • To claim to be part of a larger group, series, set

technician

Copy vocabulary

US / tekˈnɪʃn /

UK / tɛkˈnɪʃən /

B1
  • noun
  • Person whose job is to maintain, repair machinery

lab

Copy vocabulary

US / læb /

UK / læb /

B1
  • noun
  • Short for 'laboratory'

factory

Copy vocabulary

US / ˈfæktri /

UK / ˈfæktəri /

A2
  • noun
  • Building where things are made

case

Copy vocabulary

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

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

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’

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

reaction

Copy vocabulary

US / rɪ'ækʃn /

UK / riˈækʃən /

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

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

kit

Copy vocabulary

US / kɪt /

UK / kɪt /

B1
  • noun
  • Set, collection of tools, supplies, for a purpose

different

Copy vocabulary

US / ˈdɪfrənt /

UK / ˈdɪfrənt /

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

eventually

Copy vocabulary

US / ɪˈventʃuəli /

UK / ɪˈvɛntʃuəli /

A2
  • adverb
  • After a long time; after many attempts; in the end

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)

again

Copy vocabulary

US / ə'ɡen /

UK / əˈɡɛn /

A1
  • adverb
  • One more time, once more

scale

Copy vocabulary

US / skeɪl /

UK / skel /

A2
  • noun
  • Size, level, or amount when compared
  • Small hard plates that cover the body of fish
  • Device that is used to weigh a person or thing
  • Range of numbers from the lowest to the highest
  • Dimensions or size of something
  • verb
  • To change the size of but keep the proportions
  • To climb something large (e.g. a mountain)
  • To remove the scales of a fish

round

Copy vocabulary

US / raʊnd /

UK / raʊnd /

A1
  • adjecitve
  • Being in the shape of a circle or ball
  • Consisting of curved and not straight lines
  • Somewhat fat or curved in physical appearance
  • Being a whole number, not a fraction, decimal
  • adverb
  • From beginning to end (e.g. of the year)
  • noun
  • One of the three-minute periods in boxing
  • Drinks bought by one person for a group
  • Series regular visits, routes, or stops at places
  • Single shot or bullet fired from a gun
  • An object with a circular shape
  • One stage in a series of games, e.g. football
  • One's turn in a game such as cards
  • preposition
  • Going around
  • verb
  • To cause or make a circular or curved shape
  • To go or pass around the bend or corner
  • To change from a fraction to nearest whole number

effect

Copy vocabulary

US / ɪ'fekt /

UK / ɪˈfɛkt /

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

cleanly

Copy vocabulary

US / ˈklenli: /

UK / ˈklɛnli /

A2
  • adjecitve
  • Done according to the rules or standards; fair
  • adverb
  • Neatly; accurately

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

quite

Copy vocabulary

US / kwaɪt /

UK / kwaɪt /

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

not

Copy vocabulary

US / nɒt /

UK / nɑt /

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

our

Copy vocabulary

US / 'aʊə(r) /

UK / aʊr /

A1
  • determiner
  • Belonging to us

signal

Copy vocabulary

US / 'sɪɡnəl /

UK / ˈsɪɡnəl /

A2
  • adjecitve
  • Most important or most noticeable
  • noun
  • Movement of a hand or other means to send messages
  • Act/sound that tells people to do/start something
  • Road-side lights that direct traffic to go or stop
  • Sound and light waves carrying TV and radio data
  • verb
  • To be evidence/an indication something will happen
  • To make a noise or motion to tell someone to start

research

Copy vocabulary

US / rɪ'sɜ:tʃ /

UK / rɪˈsɚtʃ, ˈriˌsɚtʃ /

A2
  • noun
  • Study done to discover new ideas and facts
  • Work done to find or discover knowledge
  • verb
  • To study in order to discover new ideas and facts

give

Copy vocabulary

US / ɡɪv /

UK / ɡɪv /

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

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

demonstrate

Copy vocabulary

US / 'demənstreɪt /

UK / ˈdɛmənˌstret /

A2
  • verb
  • To display a feeling or ability openly
  • To protest about something often as a group
  • To prove or make clear by reasoning or evidence
  • To show how something works (e.g. product)

but

Copy vocabulary

US / bət /

UK / bʌt,bət /

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

want

Copy vocabulary

US / wɔnt /

UK / wɑnt, wɔnt /

A1
  • noun
  • Something you desire or wish for
  • State or condition of poverty
  • verb
  • To desire or wish for something; hope for a thing

online

Copy vocabulary

US / ˌɒnˈlaɪn /

UK / ˌɑ:nˈlaɪn /

B1
  • adjecitve
  • Connected to the internet

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

measure

Copy vocabulary

US / ˈmeʒə(r) /

UK / ˈmɛʒɚ /

A1
  • noun
  • Plan to achieve a desired result
  • Tool used to calculate the size of something
  • verb
  • To determine the value or importance of something
  • To calculate size, weight or temperature of

understand

Copy vocabulary

US / ˌʌndə'stænd /

UK / ˌʌndɚˈstænd /

A1
  • verb
  • To know the meaning of language, what someone says

would

Copy vocabulary

US / wʊd /

UK / wʊd /

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

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

interested

Copy vocabulary

US / ˈɪntrəstɪd /

UK / ˈɪntrɪstɪd, -tərɪstɪd, -təˌrɛstɪd /

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

excited

Copy vocabulary

US / ɪkˈsaɪtɪd /

UK / ɪkˈsaɪtɪd /

A2
  • adjecitve
  • Happy, interested or eager; enthusiastic
  • verb
  • To make something or someone become more active
  • To make someone feel happy, interested or eager

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

slow

Copy vocabulary

US / sləʊ /

UK / sloʊ /

A1
  • adjecitve
  • Lacking activity, busyness or excitement
  • (Clock) showing time earlier than the actual time
  • Having difficulty understanding simple things
  • Moving or happening without speed; not fast
  • verb
  • To move, with less speed than before
  • To move or go without much speed

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

save

Copy vocabulary

US / seɪv /

UK / sev /

A1
  • noun
  • Preventing a player in a game from scoring a goal
  • preposition
  • Except; not including
  • verb
  • To make your computer keep a file
  • To keep for future use
  • To make something unnecessary; prevent
  • To keep money so that you will have it later
  • To keep something for future use, such as money
  • To keep or rescue someone or something from harm
  • To prevent a player in a game from scoring a goal
  • To avoid the unnecessary waste of energy, etc.

final

Copy vocabulary

US / ˈfaɪnl /

UK / ˈfaɪnəl /

A1
  • adjecitve
  • That will not be changed; permanent
  • Being the last thing in a series
  • noun
  • Last game in a series in a competition

attach

Copy vocabulary

US / ə'tætʃ /

UK / əˈtætʃ /

A2
  • verb
  • To be associated or connected with

think

Copy vocabulary

US / θɪŋk /

UK / θɪŋk /

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

valve

Copy vocabulary

US / vælv /

UK / vælv /

B1
  • noun
  • A device along a pipe or tube to regulate flow

particular

Copy vocabulary

US / pəˈtɪkjələ(r) /

UK / pɚˈtɪkjəlɚ, pəˈtɪk- /

B2
  • adjecitve
  • One specific (one)
  • Having firm ideas about what is desirable
  • Being special or more than is typical

help

Copy vocabulary

US / help /

UK / hɛlp /

A1
  • noun
  • Something given to enable a person to do something
  • Assistance given to someone in need
  • Someone who makes something easier or possible
  • verb
  • To act to enable a person to do something; assist
  • To make something better or less difficult

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

experiment

Copy vocabulary

US / ɪk'sperɪmənt /

UK / ɪkˈspɛrəmənt /

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

react

Copy vocabulary

US / rɪ'ækt /

UK / riˈækt /

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

prepare

Copy vocabulary

US / prɪˈpeə(r) /

UK / prɪˈper /

A1
  • verb
  • To make something ready for use

continuous

Copy vocabulary

US / kənˈtɪnjuəs /

UK / kənˈtɪnjuəs /

A2
  • adjecitve
  • Happening, existing, or performed without stops

two

Copy vocabulary

US / tu: /

UK / tu /

A1
  • number
  • 2

release

Copy vocabulary

US / rɪ'li:s /

UK / rɪ'li:s /

A2
  • noun
  • Act of freeing someone from a duty or burden
  • Introduction of a new product, film, book, etc.
  • Relief from sadness, suffering or trouble
  • Act of freeing from a jail, cage, prison, etc.
  • verb
  • To free someone from a responsibility or burden
  • To allow a film, music etc. to be sold/distributed
  • To allow to leave a jail, cage, etc.; let out
  • To let go of something you are holding

put

Copy vocabulary

US / pʊt /

UK / pʊt /

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

only

Copy vocabulary

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

tube

Copy vocabulary

US / tju:b /

UK / tub,tjub /

B1
  • noun
  • Plastic or metal container for soft substances
  • Long hollow pipe used to hold or liquids or gases

where

Copy vocabulary

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

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

call

Copy vocabulary

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

approximately

Copy vocabulary

US / əˈprɒksɪmətli /

UK / əˈprɑksəmɪtlɪ /

A2
  • adverb
  • Around; nearly; almost; about (a number)

poor

Copy vocabulary

US / pʊə(r) /

UK / pʊr /

A1
  • adjecitve
  • Inferior; below the normal standard
  • Deserving of pity or sympathy
  • Without money; not rich

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

lie

Copy vocabulary

US / laɪ /

UK / lai /

A2
  • noun
  • An untrue statement, when you know it is not true
  • verb
  • To be in a horizontal or flat position
  • To say something that you know is not true

chemistry

Copy vocabulary

US / 'kemɪstrɪ /

UK / ˈkɛmɪstri /

B1
  • noun
  • The study of the structure of substances

beyond

Copy vocabulary

US / bɪ'jɒnd /

UK / biˈɑnd, bɪˈjɑnd /

A2
  • adverb
  • On or to the farther side
  • In addition to
  • preposition
  • Later in time than
  • Out of the limits of

rest

Copy vocabulary

US / rest /

UK / rɛst /

A1
  • noun
  • Time when one relaxes, sleeps, or is inactive
  • State in which there is a lack of motion
  • Part of something remaining after some was used
  • verb
  • To stop working or avoid activity to recover
  • (Of dead person) to lie in a grave
  • To lean, support or place something against
  • To not be tired because you had enough sleep

office

Copy vocabulary

US / ˈɒfɪs /

UK / ˈɔ:fɪs /

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

large

Copy vocabulary

US / lɑ:dʒ /

UK / lɑ:rdʒ /

A1
  • adjecitve
  • Big; of great size; broad, tall, wide, or fat

fascinated

Copy vocabulary

US / ˈfæsɪneɪtɪd /

UK / ˈfæsɪneɪtɪd /

B1
  • adjecitve
  • Having your attention fixated as though by a spell
  • Very interested
  • verb
  • To attract or interest greatly

temperature

Copy vocabulary

US / ˈtemprətʃə(r) /

UK / ˈtɛmpərəˌtʃʊr,-tʃɚ,ˈtɛmprə- /

A2
  • noun
  • When you your body heat is above normal
  • How hot or cold something is, e.g. the weather

over

Copy vocabulary

US / 'əʊvə(r) /

UK / ˈovɚ /

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

outflow

Copy vocabulary

US / ˈaʊtfləʊ /

UK / ˈaʊtfloʊ /

A1
  • noun
  • Process of flowing out, e.g. of emotion

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

anything

Copy vocabulary

US / ˈeniθɪŋ /

UK / ˈɛniˌθɪŋ /

A1
  • pronoun
  • A thing of any kind

turn

Copy vocabulary

US / tɜ:n /

UK / tɚn /

A1
  • noun
  • Place where changing of direction happens
  • Your time or chance to perform a duty
  • Your chance to play or do in say a game
  • Unexpected change, as in the weather
  • verb
  • To become (a particular age)
  • To become a different quality, color, etc.
  • To change the direction of something, e.g. a car
  • To move in an opposite direction or position
  • To shape metal with a spinning tool

than

Copy vocabulary

US / ðən /

UK / ðən /

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

adjust

Copy vocabulary

US / əˈdʒʌst /

UK / əˈdʒʌst /

A2
  • verb
  • To change; to attain a desired state or function
  • To change so as to fit in with new conditions

bad

Copy vocabulary

US / bæd /

UK / bæd /

A1
  • adjecitve
  • Not good; wrong
  • Lacking in good morals; evil
  • No longer fresh; spoiled

able

Copy vocabulary

US / 'eɪbl /

UK / ˈebəl /

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

chemist

Copy vocabulary

US / ˈkemɪst /

UK / ˈkɛmɪst /

B1
  • noun
  • Person who sells medicines; drug store
  • Person who studies or does research in chemistry

five

Copy vocabulary

US / faɪv /

UK / faɪv /

A1
  • number
  • 5

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)

you

Copy vocabulary

US / jʊ /

UK / ju /

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

chemical

Copy vocabulary

US / ˈkemɪkl /

UK / ˈkɛmɪkəl /

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

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

pump

Copy vocabulary

US / pʌmp /

UK / pʌmp /

B1
  • noun
  • A device more moving liquids
  • Light woman's shoe
  • verb
  • To make liquid or gas flow in a particular direction
  • To make water/other liquid move using a machine
  • To move in or out, or up and down quickly
  • asking for information in an indirect way

bottle

Copy vocabulary

US / 'bɒtl /

UK / ˈbɑtl /

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

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

word

Copy vocabulary

US / wɜ:d /

UK / wɚd /

A1
  • noun
  • Unit of language that has a meaning
  • Promise
  • Short remark or piece of information
  • verb
  • To express something by choosing particular words

cupboard

Copy vocabulary

US / ˈkʌbəd /

UK / ˈkʌbərd /

A2
  • noun
  • Piece of furniture used for storage

chromatograph

Copy vocabulary

US / 'krəʊmətəgrɑ:f /

UK / 'kroʊmətəˌgrɑ:f /

A1
  • noun
  • An instrument that produces a chromatogram.

material

Copy vocabulary

US / məˈtɪəriəl /

UK / məˈtɪriəl /

A2
  • adjecitve
  • Relevant; (of evidence) important or significant
  • Belonging to the world of physical things
  • noun
  • Cloth; fabric
  • Supplies or data needed to do a certain thing
  • Substance from which a thing is made of

might

Copy vocabulary

US / maɪt /

UK / maɪt /

A1
  • other
  • Used to politely request an action
  • Used to express that something could happen
  • Power, strength, force or influence

let

Copy vocabulary

US / let /

UK / lɛt /

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

rate

Copy vocabulary

US / reɪt /

UK / ret /

A1
  • noun
  • Current price or cost of something
  • Speed or frequency of events over time
  • verb
  • To assess something or consider its qualities

vary

Copy vocabulary

US / ˈveəri /

UK / ˈveri /

A2
  • verb
  • To change something and make it different
  • To be changeable, both up and down

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

continue

Copy vocabulary

US / kən'tɪnju: /

UK / kənˈtɪnju /

A1
  • verb
  • To do something without stopping, or after pausing
  • To start doing again after a break, pause, or stop

exactly

Copy vocabulary

US / ɪgˈzæktli /

UK / ɪɡˈzæktli /

A1
  • adverb
  • No more and no less than; precisely

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

science

Copy vocabulary

US / 'saɪəns /

UK / ˈsaɪəns /

A2
  • noun
  • Study of the physical world, based on facts

dimethyl

Copy vocabulary

US / daɪ'meθɪl /

UK / daɪ'meθəl /

A1
  • noun
  • An organic compound, especially ethane, containing two methyl groups

flow

Copy vocabulary

US / fləʊ /

UK / flo /

A2
  • noun
  • Amount of something that moves through an area
  • verb
  • To move steadily and easily in a certain direction

carbonate

Copy vocabulary

US / ˈkɑ:bəneɪt /

UK / ˈkɑ:rbənət /

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

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

write

Copy vocabulary

US / raɪt /

UK / raɪt /

A1
  • verb
  • To compose letters and words on paper or a screen
  • To invent or create a computer program
  • To create a song or piece of music

day

Copy vocabulary

US / deɪ /

UK / de /

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

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

skill

Copy vocabulary

US / skɪl /

UK / skɪl /

A2
  • noun
  • Ability to do something well

always

Copy vocabulary

US / 'ɔ:lweɪz /

UK / ˈɔlwez,-wɪz,-wiz /

A1
  • adverb
  • For a very long time
  • At all times; in every situation
  • For ever

already

Copy vocabulary

US / ɔ:lˈredi /

UK / ɔlˈrɛdi /

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

fluid

Copy vocabulary

US / 'flu:ɪd /

UK / ˈfluɪd /

B2
  • adjecitve
  • A material that can easily flow, e.g. water
  • Able to move smoothly or gracefully
  • Changing often and without warning
  • noun
  • Liquid that flows smoothly, such as water

many

Copy vocabulary

US / 'menɪ /

UK / ˈmɛni /

A1
  • determiner
  • Used to refer a large number of things

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

team

Copy vocabulary

US / ti:m /

UK / tim /

A1
  • noun
  • Group of people working on a task together
  • Group of people playing a sport together

bed

Copy vocabulary

US / bed /

UK / bɛd /

A1
  • noun
  • Flat bottom surface of a lake, ocean etc.
  • A piece of furniture that people sleep on
  • An area on which other things are put
  • Area of ground to grow vegetables or flowers
  • verb
  • To have sex with someone
  • To plant, fix, or attach something firmly to

four

Copy vocabulary

US / fɔ:(r) /

UK / fɔr, for /

A1
  • number
  • 4

heat

Copy vocabulary

US / hi:t /

UK / hit /

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

publish

Copy vocabulary

US / 'pʌblɪʃ /

UK / ˈpʌblɪʃ /

A2
  • verb
  • To prepare and make available a book magazine etc.
  • To release information to the general public

yield

Copy vocabulary

US / ji:ld /

UK / jild /

A2
  • noun
  • Amount of crops grown
  • Amount of profit you make
  • verb
  • To bend or break because of a strong force
  • To give way to someone or something else
  • To produce, usually in agriculture or business
  • To produce a certain amount of profit; result in
  • To total to a certain amount, as in a calculation

here

Copy vocabulary

US / hɪə(r) /

UK / hɪr /

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

new

Copy vocabulary

US / nju: /

UK / nu, nju /

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

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

carbon

Copy vocabulary

US / 'kɑ:bən /

UK / ˈkɑrbən /

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

side

Copy vocabulary

US / saɪd /

UK / saɪd /

A1
  • adjecitve
  • In addition to the central or most important thing
  • Next to, or very close to, the right or left of
  • noun
  • Position or opinion that is opposite to another
  • Right or left part of a person's body
  • Feature of someone's personality
  • Straight edge of an object
  • One of two or more groups fighting each other
  • verb
  • To decide to agree with one point, not the other

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

contribution

Copy vocabulary

US / ˌkɒntrɪˈbju:ʃn /

UK / ˌkɑ:ntrɪˈbju:ʃn /

A2
  • noun
  • Helping a cause by giving money, things, services
  • Article published in magazine or newspaper
  • Regular payments to the government for a pension

atom

Copy vocabulary

US / 'ætəm /

UK / ˈætəm /

B1
  • noun
  • Smallest bit that matter can be broken down into

gradually

Copy vocabulary

US / ˈgrædʒuəli /

UK / ˈɡrædʒʊəlɪ /

B1
  • adverb
  • Occurring in a slow manner over a period of time

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

they

Copy vocabulary

US / ðeɪ /

UK / ðe /

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

alcohol

Copy vocabulary

US / 'ælkəhɒl /

UK / ˈælkəˌhɔl,-ˌhɑl /

B1
  • noun
  • A colorless liquid that can catch fire (C2H5OH)
  • Drinks such as wine, whiskey, beer

change

Copy vocabulary

US / tʃeɪndʒ /

UK / tʃendʒ /

A1
  • noun
  • Exchange of one set of clothes for another
  • Money in the form of coins instead of paper
  • Money returned after giving too much
  • Act of making or becoming something else
  • verb
  • To exchange one set of clothes for another
  • To exchange one kind of money for another
  • To replace something with another thing
  • To make or become something else
  • To go from one train, bus, etc. and go to another

hold

Copy vocabulary

US / həʊld /

UK / hold /

A1
  • noun
  • Section of a ship or plane used for storing things
  • Influence or power held over someone
  • Place of support for hands or feet when climbing
  • verb
  • To agree to keep something for someone
  • To have the capacity to support/contain something
  • To control an area and protect it from attack
  • To not allow someone to leave a place
  • To cause an event to happen at a place or time
  • To use hands or arms to carry or keep something
  • To have a specific quality or property
  • To keep an image, belief or feeling in your mind
  • To have or own something
  • To wait before being able to talk on the phone
  • To limit the movement of someone in a sport

pressure

Copy vocabulary

US / 'preʃə(r) /

UK / ˈprɛʃɚ /

A2
  • noun
  • Anxiety caused by difficult problems
  • Force, weight when pressing against a thing
  • Strong persuasion to do something
  • verb
  • To apply force to something
  • To persuade or force someone to do something

result

Copy vocabulary

US / rɪ'zʌlt /

UK / rɪˈzʌlt /

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

reactor

Copy vocabulary

US / riˈæktə(r) /

UK / riˈæktɚ /

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

bit

Copy vocabulary

US / bɪt /

UK / bɪt /

A1
  • noun
  • Device put in a horse's mouth to control it
  • Small piece of something
  • verb
  • (E.g. of fish) to take bait and be caught

believe

Copy vocabulary

US / bɪ'li:v /

UK / bɪˈliv /

A1
  • verb
  • To think or accept that something is true
  • To have a particular opinion about something

look

Copy vocabulary

US / lʊk /

UK / lʊk /

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

ago

Copy vocabulary

US / əˈgəʊ /

UK / əˈgoʊ /

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

huge

Copy vocabulary

US / hju:dʒ /

UK / hjudʒ /

A2
  • adjecitve
  • Very very large

mixture

Copy vocabulary

US / ˈmɪkstʃə(r) /

UK / ˈmɪkstʃɚ /

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

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

their

Copy vocabulary

US / ðɛː /

UK / ðer /

A1
  • determiner
  • Belonging to them

possible

Copy vocabulary

US / ˈpɒsəbl /

UK / ˈpɑsəbəl /

A1
  • adjecitve
  • Being able or appropriate for a task or purpose
  • Having a chance of happening, or being true

paper

Copy vocabulary

US / ˈpeɪpə(r) /

UK / ˈpeɪpər /

A1
  • adjecitve
  • Not existing in reality, or done infrequently
  • Made from the material that we use to make books
  • noun
  • Academic writing or a talk on a specific topic
  • Written test
  • Newspaper
  • Pages of a book are made from this

bring

Copy vocabulary

US / brɪŋ /

UK / brɪŋ /

A1
  • verb
  • To take or go with someone to a place

dioxide

Copy vocabulary

US / daɪˈɒksaɪd /

UK / daɪˈɑksaɪd /

B2
  • noun
  • An oxide containing two oxides per molecule

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

build

Copy vocabulary

US / bɪld /

UK / bɪld /

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

ethanol

Copy vocabulary

US / ˈeθənɒl /

UK / ˈeθənoʊl /

A1
  • noun
  • Alcohol especially when it is used as a fuel

fill

Copy vocabulary

US / fɪl /

UK / fɪl /

A1
  • noun
  • Act of filling; amount used to make something full
  • verb
  • To make something full
  • To move into all parts of an area
  • To repair a surface by adding a substance to it
  • To use (time); to do something during

old

Copy vocabulary

US / əʊld /

UK / old /

A1
  • adjecitve
  • Having existed for a long time, not young or new
  • Age of a person since birth

prove

Copy vocabulary

US / pru:v /

UK / pruv /

A2
  • verb
  • To demonstrate truth by providing evidence

work

Copy vocabulary

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

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

ether

Copy vocabulary

US / ˈi:θə(r) /

UK / ˈiθɚ /

C1
  • noun
  • Formerly, liquid inducing sleep before dental work

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

professor

Copy vocabulary

US / prəˈfesə(r) /

UK / prəˈfɛsɚ /

A2
  • noun
  • Teacher who teaches at a college or university

remove

Copy vocabulary

US / rɪˈmu:v /

UK / rɪˈmuv /

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

who

Copy vocabulary

US / hu: /

UK / hu /

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

for

Copy vocabulary

US / fə(r) /

UK / fɔr,fə /

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

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

why

Copy vocabulary

US / waɪ /

UK / hwaɪ, waɪ /

A1
  • adverb
  • Question word to ask for a reason
  • exclamation
  • (Used to express surprise or approval)

through

Copy vocabulary

US / θru: /

UK / θru /

A2
  • adjecitve
  • having finished using or doing something
  • adverb
  • From the beginning of something until the end
  • preposition
  • Over, in, across an entire thing or place
  • Allowing you to pass between, or to
  • By a particular way or process; by the use of

automatically

Copy vocabulary

US / ˌɔ:tə'mætɪklɪ /

UK / ˌɔtəˈmætɪkl:ɪ /

B1
  • adverb
  • In a way not requiring control by a person

home

Copy vocabulary

US / həʊm /

UK / hom /

A1
  • adjecitve
  • A sports team's own field or place of play
  • adverb
  • Into the correct or intended position
  • noun
  • House, apartment or building to be rented or sold
  • Institution for sick or elderly people
  • Place where a person or a family lives
  • Country where a person lives or was born
  • Region that is native to peoples, plant or animals
  • verb
  • To move towards a particular target location

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)

amount

Copy vocabulary

US / ə'maʊnt /

UK / əˈmaʊnt /

A1
  • noun
  • Quantity of something
  • verb
  • To add up to a certain figure

reactant

Copy vocabulary

US / riˈæktənt /

UK / riˈæktənt /

B1
  • noun
  • Chemical present in a chemical reaction

border

Copy vocabulary

US / 'bɔ:də(r) /

UK / ˈbɔrdɚ /

A2
  • noun
  • Outer part or edge of something
  • Line separating one country, state from another
  • verb
  • To be right next to another country or state
  • To form the edge of something
  • To form the edge of (road, etc.)

few

Copy vocabulary

US / fju: /

UK / fju /

A1
  • pronoun
  • Not many, a small number

much

Copy vocabulary

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

under

Copy vocabulary

US / ˈʌndə(r) /

UK / ˈʌndɚ /

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

green

Copy vocabulary

US / gri:n /

UK / ɡrin /

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

question

Copy vocabulary

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

title

Copy vocabulary

US / 'taɪtl /

UK / ˈtaɪtl /

A2
  • noun
  • Book produced by a publisher
  • Name given to something to identify or describe it
  • Name showing profession, marriage or social status
  • (Legal) the right to own something, e.g. property
  • Position of being the winner in a sport or contest
  • verb
  • To give a name to identify or describe something

control

Copy vocabulary

US / kən'trəʊl /

UK / kənˈtrol /

A1
  • noun
  • A device designed to operate a machine
  • Participant in experiment that is left untouched
  • Act to dominate or command; make manageable
  • A law limiting the growth or spread of something
  • A place which overseas or manages e.g. a factory
  • verb
  • To direct or influence the behavior of something

hour

Copy vocabulary

US / 'aʊə(r) /

UK / aʊr /

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

molecule

Copy vocabulary

US / ˈmɒlɪkju:l /

UK / ˈmɑlɪˌkjul /

B2
  • noun
  • Two or more atoms chemically combined

those

Copy vocabulary

US / ðəʊz /

UK / ðoz /

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

bore

Copy vocabulary

US / bɔ:(r) /

UK / bɔr, bor /

A1
  • verb
  • To accept (responsibilities or duties)
  • To give birth to a child; to produce fruit
  • To accept or suffer the weight of difficulties
  • To show (sign of something)
  • To support the weight of something, e.g. a bridge
  • To make a deep hole in the ground with a drill
  • To make someone not interested in something

everybody

Copy vocabulary

US / ˈevribɒdi /

UK / ˈɛvriˌbɑdi, -ˌbʌdi /

A1
  • pronoun
  • Every person; everyone

piece

Copy vocabulary

US / pi:s /

UK / pis /

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

set

Copy vocabulary

US / set /

UK / sɛt /

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

start

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

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

yourself

Copy vocabulary

US / jɔ:ˈself /

UK / jʊrˈsɛlf, jɔr-, jor-, jə- /

A1
  • pronoun
  • Reflexive form of 'you', used for an emphasis

definitely

Copy vocabulary

US / ˈdefɪnətli /

UK / ˈdefɪnətli /

A2
  • adverb
  • Without question; beyond doubt

begin

Copy vocabulary

US / bɪ'ɡɪn /

UK / ˈbeɡɪn /

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

computer

Copy vocabulary

US / kəmˈpju:tə(r) /

UK / kəmˈpjutɚ /

A1
  • noun
  • Machine for storing data, accessing the internet

ryan

Copy vocabulary

US / ˈraɪən /

UK / ˈraɪən /

A1

warm

Copy vocabulary

US / wɔ:m /

UK / wɔrm /

A1
  • adjecitve
  • Friendly, sincere and kind to others
  • Being friendly or sincere
  • Slightly hot; not very hot
  • verb
  • To become more friendly or to like something
  • To make something hotter
  • Subtitles section
  • So I'm really quite excited today because we've had a paper published about our research.
  • To understand the paper, you need to appreciate that I'm a very bad chemist in making molecules.
  • My skills in the lab in preparing things have always been poor.
  • So I've always been fascinated by machines, in which you pump in the chemicals that are going to react and out comes product.
  • These days, my group uses a reactor, which is just a piece of metal tube, which, if you look through it, is empty, and we fill it with a catalyst, which turns reactants into products.
  • So the actual reactor looks like this, with tubes to pump things in and one to pump them out.
  • We pump our reactants in with high-pressure carbon dioxide, so-called supercritical fluid, removes the need to have other solvents.
  • You can see there's some kit behind me here, which I use for demonstrating supercritical fluids to visitors to my office.
  • Now, the problem with reactors like this is that there are all sorts of different reaction conditions that you have to alter to get the best results.
  • You have to change the temperature so you get the best temperature.
  • You have to alter the flow rates of the chemicals through it, and, in the case of carbon dioxide, you can vary the pressure.
  • And this is quite a slow process.
  • It takes a long time, and to be honest, it's really boring, or can be.
  • Changing the temperature just a tiny bit, looking at the results, changing it again, and so on.
  • Now, we made it easier some time ago by putting a machine on the outflow of the reactor, which analyses the products automatically, a gas chromatograph which will tell you how much of the different products you've got.
  • So this brings me to our new paper.
  • You can see it's here.
  • It was published online today.
  • So you can see it still says, these are not the final page numbers, so it's really hot.
  • It's called Self-Optimising Continuous Reactions in Supercritical Carbon Dioxide.
  • The point about this experiment, the thing that's really important, is the first word of the title, self-optimising.
  • So what we've done is to use the signals from the gas chromatograph to adjust the conditions of the reaction.
  • So you begin by telling the reactor which product you want.
  • You give it a few starting conditions so it knows approximately the right temperatures and pressures, and then you let it get on with it.
  • It analyses the first four different sets of conditions, and then the computer attached to the machine calculates what it thinks is a better condition, and it goes on gradually improving things till it gets the highest possible yield of the product.
  • And you don't need to do anything.
  • You can be lying in bed and the machine is working away.
  • And the thing that's exciting is that it takes away all the boring bits and lets you think about the science.
  • But let's go to the lab and have a look so you can see it for yourself.
  • This is one of my other students, Ryan, who's now using the machine to go on to do other reactions beyond what we've already published, because it takes quite a long time between writing the paper and getting it published.
  • In this reaction, and the one we used to prove the idea, we're reacting an alcohol, not ethanol, but pentanol, that has five carbon atoms, with a molecule called dimethyl carbonate, which makes an ether.
  • The mixture of the two starting materials, pentanol and DMC, are in this bottle here.
  • And they're going through this pipe and into a pump.
  • And the pump pumps the reaction solution into the reactor.
  • And at the same time, we have a second pump that pumps in the carbon dioxide.
  • The cylinder that holds the carbon dioxide is in the cupboard behind me.
  • The reactants and the carbon dioxide are mixed here.
  • One comes in this side, one that side, and this measures the temperature.
  • Here there is a so-called preheater, which warms things up.
  • And then it goes through the reactor, which is exactly like the one in my office, but it has a metal block around it to heat it up.
  • Then the product comes out of this pipe up to here.
  • This is a valve which takes small samples into this machine that analyses it, the gas chromatograph.
  • And the rest of the flow, which we haven't analysed, continues on into this valve that releases the pressure, and the product goes into the bottle here.
  • The important thing is really the signals that go to the computer, then over there to where the results are analysed.
  • Now we calculated in the paper that in the old way we used to do it, where we change the temperature and look at that effect, and then raise the pressure a bit, change the temperature, and so on, the experiment that we published would have taken 84 days to do it.
  • Under computer control it only took 36 hours.
  • So it's a huge saving in time.
  • So some people might question, is this really chemistry?
  • I think it definitely is.
  • It's on the borders of chemistry and chemical engineering, but if you're interested like I am in greener ways of making chemicals, you can't just make tiny amounts in the lab.
  • You have to be able to do it on a larger scale, eventually to build whole factories to do this.
  • So I'm very excited because I believe this is the way of doing chemistry far more cleanly than many of the chemical reactions are done now.
  • So here you can see how the computer is changing the conditions and homing in round here in the best possible yield for that particular product.
  • So like all bits of science done now, it's not the professor who does the experiments, but there's a whole team and everybody makes their contribution, which is why there's so many authors on the paper.
  • And apart from that, there are acknowledgements on the paper to those that have helped us, particularly in this case the technicians who made some of the reactors and the other things that we use.
  • So we're really proud, the whole team.