1. 1. Which picture below represents atoms/molecules in a
solid? C
2. Which picture below represents atoms/molecules in a
liquid? B
3. Which picture below represents atoms/molecules in a
gas? A
B.
C.
A.

2. Review
States of matter
Solid
Liquid
Gas
Plasma

3. Physical Change
Change in matter that
does not produce new
products
May look different, but
it’s not a new
substance

4. Physical Change
Chemical properties are
not changed
No energy given or
taken unless there is a
change of state

5. Change of State
Molecules gain or lose kinetic
energy
Melting/freezing,
evaporating/condensation

6. Change of State
Sublimation
Going from a solid to a
gas
Skips the liquid state

7. Chemical Change
Matter changes from one
kind of material to another
The atoms do not change
They rearrange themselves
Not “easily” reversed

8. Chemical Change
The new substances
have new properties
Chemical change takes
place during a chemical
reaction

9. Energy
Always a part of a
chemical change
Given or taken