Across
- 1. point a liquid slowly changing into a gas
- 4. to allow electricity or energy to flow through
- 5. cannot be turned into anything else but itself
- 6. of an atom.
- 8. point the temp a which a liquid changes state
- 10. of matter solid liquid or gas
- 11. the force of gravity between earth and an object
- 12. the amount of space an object takes up
- 15. materials spread out as they get hotter
- 16. combination of elements
- 20. the temp at which a liquid changes into a
- 21. the amount of matter in an object
Down
- 2. the atom's center
- 3. what an object is made of.
- 7. a particle with a positive charge in the
- 9. a particle with a negative charge
- 13. point the temp at which a solid changes to a
- 14. the smallest unit of an element
- 17. a basic building block of matter
- 18. a solid
- 19. how big something is for its size