Across
- 3. The type of system when matter all stays in the same place.
- 5. The type of system when matter can enter and escape.
- 6. Type of reaction in which things are put together.
- 7. Reaction in which one element replaces another element in a compound
- 9. The law of ____________ of mass states that matter can not be created or destroyed.
- 10. The little number below the letters in a chemical formula.
Down
- 1. We use chemical ________________ to represent what is going on in a reaction.
- 2. Type of reaction where compounds break into simpler products.
- 4. Tells you how many of the molecules are in a reaction.
- 8. Area where a chemical reaction occurs.
- 11. A chemical equation bust be _______________.