Across
- 4. A product of the thermal decomposition of calcium carbonate is calcium ________
- 6. A substance formed from a chemical reaction
- 7. A substance that speeds up a chemical reaction without being used up.
- 8. A type of reaction where energy is absorbed
- 10. A reaction where a fuel reacts with oxygen
Down
- 1. The type of reaction where energy is released
- 2. A law that states mass is neither created nor destroyed in a chemical reaction
- 3. A substance used up in a chemical reaction
- 5. One of the products of a combustion reaction
- 9. A type of change where new substances are formed