Chapter 2: Particles of matter

Solid

Closely packed particles are always in ___

Liquids

Particles not tightly held in ___

Gases

Particles further apart in ____

Melting point

_the constant temperature where pure solid changes to liquid

Boiling point

_the constant temperature where pure liquid changes to gas

Sublimation

_direct change of solid to gas

diffusion

___the process in which there is movement of a substance from an area of high concentration of that substance to an area of lower concentration