1. Physical
&
Chemical
Changes

2. Physical Changes
A Physical Change is when an object changes a physical property.
A change in size, shape, texture, or state.
The object still is the same thing.

3. Examples of Physical Changes
Ripped Paper
Boiling Water
Cutting Hair
Broken Brick

4. Chemical Changes
A Chemical Change is a change in the chemical make up of the object.
The object becomes a new object.
Something new is created.

5. Keys to Identifying a Chemical Change
Color change
Temperature change
Formation of a gas, bubbles, or odor.
Formation of a precipitate.

6. Examples of Chemical Changes
Fireworks exploding
An apple rotting
Baked cookies
Photosynthesis/Respiration
Digestion
Combustion

7. Is It a Physical or Chemical Change?
Burning House
Chemical
Melting Ice
Physical
Cutting Grass

8. Chemical Reaction -- A process in which some substances change into different substances.
Ex: Magnesium + Oxygen  Magnesium Oxide + =

9. Chemical Equations: Reactants Products
Reactants – starting substance.. What reacts
On left of arrow
Products – ending substance… what is produced.
On right of arrow