1. Physical and Chemical Changes

2. Physical Changes in Matter
Physical change: a change in size, shape, or state of matter. It does not form a different type of matter.

3. Chemical Changes in Matter
Chemical change: a change in matter that forms a different type of matter with different properties. A new substance is created that wasn’t there before.

4. Physical vs. Chemical Changes
Type of change
Is new matter created?
Can it be reversed?
Examples
Physical
Change
Chemical

5. Evidence of a Chemical Change
Color change
Formation of a gas
look for bubbling or fizzing
Formation of a solid
Production of heat or light
this is the release of energy

6. Exit Ticket Fold a sheet of paper in half twice, to make 4 boxes.
In each box, write whether each change (see picture to the right) is physical or chemical
Explain WHY, using evidence from this PowerPoint or your textbook.
1 Ice melting
A firework exploding
3 A marshmallow burning
A paperclip being bent