1. Bellringer Identify the changes as PHYSICAL (P) OR CHEMCIAL (C)
in the BEFORE column

2. Learning Target…
I can distinguish between a physical and chemical change. This means I know what physical changes and chemical changes are and I can tell the difference between them.

3. Characteristics of Physical Changes
A change in physical properties
Change the form or appearance of the substance
A new substance is NOT formed
You can often reverse it

4. Examples of Physical Changes
Cutting
Change in shape
Dissolving
Consider dissolving sugar in lemonade, though you can no longer see the sugar, you know it hasn’t changed because you can still taste it!

5. Examples of Physical Change
Any change in state
Melting: solid to liquid
Boiling: liquid to gas
Condensation: gas to liquid
Freezing: liquid to solid
Sublimation: solid to gas
Deposition: gas to solid

6. Changes of State Matter is made up of moving particles
The state of matter is determined by how much energy the particles have
Draw a picture of what the particles look like in a solid, liquid, and gas.

7. Changes of State Solids Liquids Gas
Particles are close together and only vibrate
Liquids
Particles move faster and slide past each other
Gas
Particles move quickly and far apart

8. Changes of State
Particles of matter move faster or slow down as temperature changes and so the state changes!

9. More about state changes….
BrainPop

10. Illustrating Physical Changes
Let’s illustrate some physical changes!
Consider what the particles are doing during the change!
First, let’s do one together!
Cutting paper
Melting ice
Evaporating water
Mixing salt and water
Molding playdough