Across
- 4. type of change that makes one or more new substances
- 7. substances that undergo a chemical change
- 9. type of reaction that releases heat
- 10. type of reaction that absorbs energy
Down
- 1. substance that is made by a chemical change
- 2. Thing that lowers the amount of energy needed to start a reaction.
- 3. The higher the ____________ the faster the atoms move
- 5. change that does not make a new substance
- 6. More _________ area allows for faster reactions.
- 8. example of a physical change