Chemical Reactions (Chapter 1)

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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. 7. formed by repeating groups of atoms linked together in a large
  3. 9. the temperature at which a substance changes from liquid to gas
  4. 11. something made of all the same atoms or molecules
Down
  1. 1. a group of atoms bonded in a specific way
  2. 3. letters and numbers that show the types and number of atoms that make up a substance
  3. 4. the temperature at which a substance changes from solid to liquid
  4. 5. added to soil to help plants grow
  5. 6. relative size
  6. 8. the tiny pieces that all matter is made of
  7. 10. characteristic that can be observed about a substance