Across
- 4. A starting substance in a chemical reaction
- 6. A reaction that absorbs heat
- 9. The total heat content of a system
- 10. energy Minimum energy required to start a reaction
Down
- 1. A substance formed from a chemical reaction
- 2. A reaction where two or more substances combine to form a single product
- 3. A reaction where one compound breaks down into simpler substances
- 5. A reaction that involves oxygen and produces heat and light
- 7. A reaction that releases heat
- 8. Speeds up a chemical reaction without being consumed