Across
- 6. contains regions that have different properties from others
- 7. contain two or more kinds of atoms
- 9. always has the same composition
Down
- 1. a pure substance
- 2. has mass and occupies space
- 3. Contain only one kind of atom
- 4. the same throughout
- 5. change involves a change in the physical properties
- 7. change a substance's ability to change in one or more new substances
- 8. atoms bound together in a particular way