Across
- 1. release of light or heat energy; evidence of a chemical change
- 3. how easily a substance catches fire
- 4. properties that can be observed
- 6. a change which results in a new substance with different properties; non-reversible
- 8. increase/decrease of heat energy; evidence of a chemical change
- 9. a change without forming a new substance; reversible
Down
- 2. visible change in a substance's color; is evidence of a chemical change
- 4. bubbles, fizzing, odor change; evidence of a chemical change
- 5. a solid substance that forms from a solution; evidence of a chemical change
- 7. mass cannot be created or destroyed