Chemistry!

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Across
  1. 3. mixture can't see different parts
  2. 6. amount of space matter occupies
  3. 8. measure of force of gravity
  4. 9. the basic particle from which everything is made
  5. 11. anything that has mass
Down
  1. 1. mixture see different parts
  2. 2. a single kind of matter
  3. 4. a substance that can't be broken down
  4. 5. substance made of 2 or more elements
  5. 7. the study of matter and how it changes
  6. 10. 2 or more atoms
  7. 11. amount of matter in an object