Matter Matters

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Across
  1. 3. At an object's _____ point, its state changes from a liquid to a gas.
  2. 4. The very smallest piece of matter is an _____.
  3. 7. At an object's _____ point, it changes state from a liquid to a solid.
  4. 9. The form of energy most often used to change an object from one state of matter to another.
  5. 11. Some solids do not become liquids but go straight to their gaseous form in a change called _____.
  6. 12. _____ is required for an object to change its state of matter.
  7. 14. Very small pieces of something.
  8. 15. A collection of atoms.
  9. 16. The state of matter that has a definite shape and a definite volume.
  10. 17. The state of matter that has no definite shape, but a definite volume.
Down
  1. 1. At an object's ______ point, it changes state from a solid to a liquid.
  2. 2. At an object's _____ point it changes state from a gas to a liquid.
  3. 5. Everything around us that isn't energy is _____.
  4. 6. There are three states of matter
  5. 8. The amount of water in the air is called _____.
  6. 10. Another name for a gas is _____.
  7. 13. The state of matter that has no definite shape and no definite volume.