Across
- 2. chemical reaction that gives off heat energy
- 4. in a chemical reaction the arrow usually points away from the reactant
- 5. a chemical reaction that obsons heat energy
- 7. a process that changes substance into new substance
Down
- 1. reaction a process that changes substance into new substance
- 3. the result of a chemical reaction
- 6. a change in matter that does not affect its chemical composition
- 8. material that has mass and takes up some amount of spaces