SCIENCE

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Across
  1. 1. force of gravity between the object and earth
  2. 5. there are 118
  3. 8. substances that change in a different way
  4. 12. is much less dense than water
  5. 13. smallest unit of a element
  6. 14. has north and south poles
  7. 16. materials as they get hotter
  8. 18. materials as they get colder
  9. 19. it measures force
Down
  1. 2. comes from petroleum
  2. 3. solids keep their
  3. 4. tiny very dense body in the atom center
  4. 6. three states of matter
  5. 7. amount of matter in a object
  6. 8. three fourths of the elements are
  7. 9. also called the melting point
  8. 10. what measures mass
  9. 11. when heat is removed from a boiling substance
  10. 15. a substance melting or boiling
  11. 17. determines what element it is