Matter choice

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Across
  1. 2. cold, ice
  2. 4. copper
  3. 7. two or more combined
  4. 8. merge
  5. 10. takes up space
Down
  1. 1. heat, cold
  2. 3. point stove.
  3. 5. water
  4. 6. atom
  5. 9. no shape or volume