Particles

2. It occurs when the fastest moving particles escape from the surface of a liquid.
5. The process of liquid changing to gas.
7. It is the random movement of particles that causes them to spread out.
11. The particles in it are packed closely together in ordered rows.
13. The process of liquid changing to solid.
15. We need it for moving.
16. Anything that has a mass and takes up space.
17. The process of solid changing to gas.
18. The process of solid changing to liquid.

1. The process of gas changing to solid.
3. It happens when a matter of higher density is put into another matter of lower density.
4. The size of a matter. Expressed in cm3, etc.
6. The particles in it are still close together but randomly arranged.
8. The particles in it are far apart.
9. The process of gas changing to liquid.
10. A factor that affects the speeds of evaporation and diffusion.
12. A gas that enters the body by diffusion at the lungs.
13. It happens when a matter of lower density is put into another matter of higher density.
14. It describes how tightly packed something is.