What's the Matter?

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Across
  1. 2. takes the shape of the container and flows
  2. 5. frozen water
  3. 6. small particles that make up matter
  4. 9. liquid turning into solid
  5. 11. something that takes up space
Down
  1. 1. a rock is an example of this
  2. 3. cannot be seen
  3. 4. solid turning into liquid
  4. 7. we breathe in this gas
  5. 8. number of states of matter
  6. 10. invisible state of matter