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