Across
- 1. a solid is a ______ of matter.
- 3. ice cream melts due to the _____.
- 4. when you ___ wood it is a physical change
- 7. humans need _______ to survive.
- 9. ______ is anything that takes up space.
- 10. helium is a type of ____.
- 13. a ______ has the tightest atoms.
- 14. _______ is one thing that makes up matter.
- 15. _______ has a fixed volume.
Down
- 2. if you boil water the water will _________.
- 5. when you rip paper a _______ change happens.
- 6. air makes a lemon ____.
- 8. it is a physical change when ice cream _____.
- 11. _______is another thing that makes up matter.
- 12. when a lemon rots it is a _________ change.