Across
- 4. can be found in fizzing or bubbling of substances
- 5. the resulting substance af a chemical reaction
- 6. an _ reaction releases heat
- 7. starting substance of a chemical reaction
- 8. a _ reaction changes substances into new substances
Down
- 1. an _ reaction absorbs heat
- 2. usually found when a substance rots
- 3. emits energy through thermal energy
- 5. solid formed in some chemical reactions
- 8. usually seen in the rusting of metal over time