Across
- 5. Reaction in which heat and light are released
- 6. Law stating that total mass remains the same in a reaction
- 8. A solid formed during a chemical reaction
- 11. Reaction between an acid and a base
Down
- 1. The process in which a solid turns directly into gas
- 2. dioxide Colourless gas produced when fuels burn completely
- 3. Substances used to produce heat energy
- 4. A process where a liquid changes into vapour
- 5. Change where new substances are formed
- 7. Gas that supports combustion
- 9. Type of change where no new substance is formed
- 10. The red-brown coating formed on iron