Across
- 2. a burning candlelight can be an example of _________ _________
- 6. new substances formed by the reaction
- 7. a solid that forms from solution during a chemical reaction
- 8. the ratio of elements in a compound
- 9. the substances that undergo change in chemical reaction
- 10. reactant + reactant → product + product
Down
- 1. the study of matter and how matter changes
- 2. photosynthesis is an example of an _________ _________
- 3. burning is an example of a _______ _______
- 4. matter is not allowed to enter or leave
- 5. matter can enter from or escape to the surroundings
- 6. melting is an example of a _______ _______
- 11. a number placed in front of a chemical formula in an equation