Across
- 4. A type of distillation that separates the fractions of crude oil
- 5. A material that changes colour at deifferent temperatures
- 6. Opposite to an alkali
- 7. Increasing this can increase the rate of a chemical reaction
- 10. A material used in bullet proof jackets
- 11. Found in the outer shell of an atom
Down
- 1. One natural disaster caused by the movement of the Earth's plates
- 2. A gas that causes acid rain
- 3. If rubbish is not taken to landfill it is...
- 8. A hydrocarbon that contains a double bond
- 9. A metal in group 1
- 12. An organic compound that smells sweet