physical vs. chemical change pg 87

Physical vs. Chemical

Changepg 87

Bpop

Physical Change-

1) Only physical properties change. Chemical properties do not change.

2) Physical changes are generally easy to reverse. 3) No energy is

produced by the substance.

Chemical Change-

1) Both physical and chemical properties are changed.

2) Changes are not reversible without another reaction. 3) Energy is often produced ( fire or heat, for example).

Most chemical changes will have one or more of the following:

HeatBurningColor without you adding itOdor Gas given off

Law of Conservation of Mass

Matter may change form, it can not be created or destroyed

http://www.brainpop.com/science/matterandchemistry/conservationofmass/

Bpop quiz

Let’s test your

knowledge

Pick an apt clock to work withEvery group gets a whiteboardHave 30 sec to 1 minThen 321 show!

Baking

Chemical Change

Mashing potatoes

Physical Change

Ripping a page

Rotting an apple

Chemical Change

Adding food coloring to water

Physical Change

Chewing food

Physical Change

Digesting food

Chemical Change

An ice cube melting

Physical Change

Mixing salt in water

Physical Change

Two clear liquids are mixed and a white color forms

Chemical Change

Water turning to vapor

Physical Change

Mixing salt and sugar

Physical Change

The reason the Statue of liberty is green

Chemical Change

Respiration

Chemical Change

Photosynthesis

•Chemical Change

•Practice time!