Chemistry

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Across
  1. 2. the remains of an animal from a long time ago
  2. 5. when two solutions reaction to make a solid
  3. 7. reaction giving out heat
  4. 8. heat breaking apart
  5. 10. reaction taking in heat
Down
  1. 1. two or more elements or compounds mixed together
  2. 3. the smallest piece of any substance
  3. 4. the scientific word for burning
  4. 6. made up of two different atoms chemically joined together
  5. 9. things that land living things need to breath
  6. 11. made up of one type of atom