Also called “States” of Matter The 4 Phases of Matter Also called “States” of Matter

The phase a piece of matter is in depends on how much energy it has The 4 phases of matter: More Energy The phase a piece of matter is in depends on how much energy it has

Comparing the Phases of Matter Has definite shape and fixed volume Particles vibrate In place Takes shape of container Has fixed volume, Particles flow past each other Takes shape and volume of container Particles move freely at rapid speed

Phase Changes As energy is added to or removed from matter, it can change from one phase to another. Know the terms for each phase change.

Phase Changes Energy absorbed by substance Energy released by substance

It’s just a phase you’re going through. Oh Bunsen, my flame. I love you so much. I just melt every time I see you. It’s just a phase you’re going through.

Practice Questions? Which phases of matter take the shape of their container? Which phases of matter have a fixed volume? Which phase of matter has particles moving very quickly in totally random motion? Which phase of matter has closely packed particles that are fixed in position? Which phase of matter has closely packed particles that can move by sliding past each other?

Answers Liquids and gases Solids and liquids Gas Solid liquid