1. States of Matter

2. There are three states of matter.
Solids
Liquids
Gases

3. Matter is made up of anything that takes up space and has mass.
Does air take up
space?
Does air have
mass?

4. Solids
Have a definite shape
Have a definite volume
Molecules are packed tightly together
Molecules cannot move freely

5. Liquids Have no fixed shape Have a definite volume
Molecules are packed loosely together
Molecules can move a little

6. Gases Have no definite shape Have no definite volume
Molecules are far apart
Molecules move freely

7. Changes of State Liquid Solid Gas melting evaporating freezing
condensing

8. Review Questions 1. Name the three states of matter.
2. The molecules cannot move freely in which state of matter?
3. The change from a liquid to a gas is called _____________.
4. The change from a gas to a liquid is called _____________.

9. Question to think about!
Why are changes of state
important?