Particle model word list

2. One of the three states of matter that's particle s vibrate.
6. The quality or condition of being hard.
7. The process when a substance heats up or starts to get hot.
8. Water which collects as droplets on a cold surface when humid air is in contact with it.
12. A particular type of matter with uniform properties.
15. The point when a liquid turns to gas.
17. One of the three states of matter that is runny.
18. The body of theory which explains the physical properties of matter in terms of the motions of its constituent particles.
19. The strength and vitality required for sustained physical or mental activity.
21. A supposition or a system of ideas intended to explain something, especially one based on general principles independent of the thing to be explained.

1. The process when something cools down or starts to get colder
3. The process of liquid turning to vapour.
4. The spreading of something more widely.
5. A minute portion of matter
9. A particle that makes up everything in the world.
10. The gooiness of a substance/liquid.
11. The degree of compactness of a substance.
13. The resistance of a material to breaking under tension.
14. Physical substance in general, as distinct from mind and spirit; (in physics) that which occupies space and possesses rest mass, especially as distinct from energy.
16. A three-dimensional representation of a person or thing or of a proposed structure, typically on a smaller scale than the original.
20. One of the three states of matter that's particles are flying around.