Definitiosn Week 3 Flashcards
1
Q
Catalyst
A
Substances that alter the rate of chemical reactions but are not used up themselves
2
Q
Cellulose
A
The substance that makes cell walls and provides fibre in he human diet
3
Q
Cell wall
A
Found outside the cell membrane in plant cells
4
Q
Chemical change
A
A change in which a new substance is formed
5
Q
Chemical energy
A
Energy stored inside materials in the chemical bonds holding them together
6
Q
Chlorination
A
The addition of chlorine to water to add bacteria
7
Q
Chloroplasts
A
Contain the green pigment called chlorophyll
8
Q
Chromatography
A
Separation technique used to separate a mixture of dissolved substances in a solution
9
Q
Competition
A
Takes place when two or more organisms require something that is of a short supply
10
Q
Compounds
A
Made up of two or more types of chemically combined atoms
