Definitiosn Week 3 Flashcards

1
Q

Catalyst

A

Substances that alter the rate of chemical reactions but are not used up themselves

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2
Q

Cellulose

A

The substance that makes cell walls and provides fibre in he human diet

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3
Q

Cell wall

A

Found outside the cell membrane in plant cells

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4
Q

Chemical change

A

A change in which a new substance is formed

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5
Q

Chemical energy

A

Energy stored inside materials in the chemical bonds holding them together

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6
Q

Chlorination

A

The addition of chlorine to water to add bacteria

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7
Q

Chloroplasts

A

Contain the green pigment called chlorophyll

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8
Q

Chromatography

A

Separation technique used to separate a mixture of dissolved substances in a solution

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9
Q

Competition

A

Takes place when two or more organisms require something that is of a short supply

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10
Q

Compounds

A

Made up of two or more types of chemically combined atoms

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