Matter

7. when heat is absorbed by a solid, the molecules vibrate ______
8. when a liquid __________, it gradually changes to a gas.
10. adding or removing ____ makes substances change from one state to another.
11. substances change state because their _________ are arranged in a different way.
12. materials ______ as they get hotter.
13. heat causes the molecules of a solid to ________ from each other, making the solid become a liquid.
15. the liquid in a ___________ expands or contracts with changes in temperature.
17. when heat is removed from a boiling substance, it _________.
18. materials ________ as they get cooler.
19. the melting point is also called the ________ point.
21. when molecules are linked in organized positions, a _____ results.

1. gases fill the ______ of their containers.
2. the molecules of any substance are _________ to each other.
3. when a liquid _____, it changes to a gas rapidly.
4. one of the states of mater
5. when a change of _____ occurs, the identity of the substance stays the same.
6. when a substance is melting or boiling, its _________ stays the same
7. point every substance has its own particular melting point and ________ _____
9. solids keep their _____.
14. one of the states of matter
16. substances that are _____ expand or contract the most with changing temperature.
20. when water absorbs enough heat, it turns into a ___