chem 101

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Across
  1. 4. atoms bonded together
  2. 5. measuring method used in the US
  3. 8. a set of standard units agreed on by scientists around the world
Down
  1. 1. a tentative interpretation or explanation of observations
  2. 2. matter cannot be created or destroyed
  3. 3. one or more well-established hypotheses
  4. 6. amount of matter in an object
  5. 7. what all matter is composed of