Across
- 1. A change which transfers energy to the surroundings.
- 4. The starting substances in a chemical reaction.
- 7. Type of reaction in which you cannot get back the substances you started with.
- 8. A substance made of two or more atoms chemically joined together.
Down
- 2. A possible source of danger.
- 3. A change which transfers energy from the surroundings.
- 5. A chemical _____ shows how many atoms of each elements are in a compound.
- 6. The resulting substances in a chemical reaction.