Chemical Reactions

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Across
  1. 2. an object, diagram, or computer program that helps us understand something by making it easier to see
  2. 5. able to cause damage
  3. 8. group of atoms joined in a particular way
  4. 9. the tiny pieces that all matter is made of
  5. 11. atoms rearrange to form new substances
  6. 12. the temperature at which a substance changes from the solid phase to the liquid phase
Down
  1. 1. letters and numbers showing the types and number of atoms that repeat to make up a substance
  2. 3. an ending substance made during chemical reaction
  3. 4. a starting substance that is part of a chemical reaction
  4. 6. temperature when liquid changes to gas
  5. 7. something that is made of all the same atoms or groups of atoms
  6. 10. a substance that is added to soil to help plants grow
  7. 13. something that can be observed about a substance, such as color, smell, or boiling point