Properties of state and matter

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Across
  1. 5. Molecules of ( ) always contain only one kind of atom.
  2. 7. As more matter gets packed into the same amount of space,the material's density.
  3. 11. When a liquid ( ), it changes to a gas rapidly.
  4. 12. When a change of ( ) occurs, the identity of the substance stays the same.
  5. 13. Solids keep their?
  6. 15. The ( ) of an object is a measure of the force of gravity between Earth and the object.
  7. 16. ( ) keep their shape of their containers.
Down
  1. 1. The ( ) of an object tells us how massive something is for its size
  2. 2. When heat is absorbed by a solid, the molecules vibrate?
  3. 3. Some elements take part in ( ) much more easily than others.
  4. 4. Scientists use a quantity
  5. 6. As long as conditions such as ( ) do not change, the density of a substance does not change
  6. 8. A measure of a amount of matter in an object is?
  7. 9. The melting point is also called the?
  8. 10. What comes from petroleums?
  9. 14. When water absorbs enough heat it turns into what?