unit 8 spelling and vocabulary words

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Across
  1. 1. a type of animal (humans are mammals)
  2. 7. to turn into a solution
  3. 8. turn from liquid into vapor
  4. 9. the act of finding something new or unexpected
Down
  1. 1. a group of atoms bonded together
  2. 2. the basic unit of an element
  3. 3. the science of fossils
  4. 4. any substance that occupies space and has mass
  5. 5. the amount of matter in a substance or object
  6. 6. two or more substances that are combined without changing their chemical composition