Activate 2 Glossary C

Front 1

enzyme that breaks down carbohydrates into sugar molecules

Back 1

carbohydrase

Front 2

carbohydrate

Back 2

nutrient that provides energy

Front 3

shows stores of carbon and how it enters and leaves these stores

Back 3

carbon cycle

Front 4

a material made from thin tubes of carbon

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carbon fibre

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a place when carbon and its compounds may remain for a long time. include atmosphere, oceans, sedimentary rocks, fossil fuels, soil and living organisms

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carbon store

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catalyst

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speeds up a reaction without being used up

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cell

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a chemical store of energy which provides the push that moves charge around a circuit

Front 8

the 'gluing together' of sediments by different chemicals to make sedimentary rocks

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cementation

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center of gravity

Back 9

the point in and object where the force of gravity seems to act

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center of mass

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the point in an object where the mass of an object seems to act

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a compound such as a metal silicate or oxide that is hard, strong and has a high melting point

Back 11

ceramic

Front 12

chemical property

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how a substance behaves in chemical reactions

Front 13

energy stored in food and fuels

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chemical store

Front 14

the breaking up or wearing down of rocks by the action of chemicals such as those in rain water

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chemical weathering

Front 15

chemosynthesis

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reaction performed by bacteria using energy transferred from chemical reactions to produce glucose

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chlorophyll

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green pigment that absorbs light for use in photosynethesis

Front 17

an image obtained from chromatography

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chromatogram

Front 18

a technique to separate mixtures of liquids that are soluble in the same solvent

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chromatography

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chromosome

Back 19

long strand of DNA which may contain many genes

Front 20

climate change

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a long term change in weather patterns

Front 21

plants and animals living in the same habitat at the same time

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co-exist

Front 22

a burning reaction in which a substance reacts quickly with oxygen and gives out light and heats the surroundings

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combustion

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the collection of the different types of organism present in an ecosystem

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community

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the process of squashing sediments together to make new rocks by the weight of the layers above

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compaction

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competition

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competing with other organisms for resources

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a mixture of materials with properties that a combination or those of the materials in it

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composite

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compressed

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squashed into a smaller space

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the way in which energy is transferred through solids and to a much lesser extent in liquids and gases

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conduction

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a material that conducts charge or energy well such as metal or graphite

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conductor

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consumer

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organisms that eat other organisms as food

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characteristic that can take any value within a range of values

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continuous variation

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the transfer of energy by the movement of gases or liquids

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convection

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convection current

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the movement of heated liquids or gases

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a rod or a magnetic material placed inside a coil to make the magnetic field of an electromagnet stronger

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core

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crust

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the rocky outer layer of the Earth

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current

Back 36

the flow of electrical charge (electrons) around a complete circuit per second