1. Physical and Chemical Changes
Draw a T chart in your notes and label one side Physical Change and the other side Chemical Change

2. Concept of Change
Change: the act of altering a substance

3. Physical Change
Physical change: a change that occurs that does not change the identity of the substance
Melting ice
Freezing Kool-aid
Tearing paper
Boiling water

4. Evidence of Physical Changes
Dissolved
Change in shape
Change of states
solid to liquid
Liquid to gas

5. Chemical Changes
Chemical change: a change that occurs causing the identity of the substance to change
Burning
Reacting with other substances
A chemical change is called a chemical

6. Chemical Changes Cont’d
Evidence of a chemical change:
Formation of gas
Change in temperature
Color change
Formation of a precipitate