Dr Barker 2011

Across
5. A reaction in which water is chemically added to a compound.
7. The reaction of monomers to make a polymer.
9. The reaction in which the enzymes in yeast turn glucose into ethanol and carbon dioxide.
10. An alkene with the formula C
3
H
6
.
11. Polymers that change in response to changes in their environment.
12. A hydrocarbon whose molecules contain at least one carbon-carbon double bond.
Down
1. Something that cannot be replaced once it is used up.
2. An alkene with the formula C
2
H
4
.
3. The reaction used in the oil industry to break down large hydrocarbons into smaller, more useful ones.
4. Small reactive molecules that react together in repeating sequences to form a very large molecule ( a polymer).
6. A covalent bond made by the sharing of two electrons.
8. Materials that can be broken down by microorganisms.
10. A substance made from very large molecules made up of many repeating units.
13. Unsaturated hydrocarbon which contains a carbon-carbon double bond. The general formula s C n
H
2n
.
Dr Barker 2011