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

2. 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

4. 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

5. 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.

6. Phase Changes Energy absorbed by substance
Energy released by substance

7. 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.

8. 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?

9. Answers
Liquids and gases
Solids and liquids
Gas
Solid
liquid