Across
- 1. a change in matter
- 5. the substances present before a chemical reaction occurs.
- 7. material that mass and takes up some amount of space
- 8. chemical reaction that gives off heat energy
Down
- 2. a chemical reaction
- 3. a chemical reaction that absorbs heat energy
- 4. the substances that are formed during a chemical reaction
- 6. a chemical change that changes substance into a new substance