Across
- 1. A substance that is made in a chemical reaction
- 4. A substance made up of atoms of two or more elements strongly joined together
- 5. A reaction which absorbs energy in the form of heat from the surroundings
- 9. The gas which turns limewater cloudy
- 11. The gaining of oxygen by a substance
- 12. Changes of State are an example of which type of reaction?
Down
- 2. A starting substance in a chemical reaction.
- 3. Thermal ________ is the production of smaller substances when a metal carbonate is heated
- 6. A quantity which is conserved in chemical reactions
- 7. Most fuels we use, including candle wax, are these types of molecules
- 8. A chemical reaction in which a substance reacts quickly with oxygen and gives out light and heat
- 10. A reaction which transfers energy in the form of heat to the surroundings