Physical and Chemical Changes

Physical Change Physical changes occur when matter

changes its properties but does NOT change the composition.

Changes what it looks like Physical changes can be “undone”

Physical changes in matter

Freezing Dissolving Cut Folded Shape Size Texture State of matter Volume Melting Mass/Weight Expected Color Change

Choose 3 Examples for your notes

Physical Change

This is a physical change because water is changed to ice. This is a liquid changing to a solid which is a change in the state of matter only.

Chemical Change

Chemical changes are changes matter undergoes when it becomes new or different matter.

Chemical changes cannot be undone Burning, Rusting and Cooking a

common examples of chemical changes

UNEXPECTED Color Change Gas Formation Precipitate Formation Temperature Change-Endothermic (inside)-Exothermic (outside)

4 signs of a chemical reaction

Chemical Change A chemical change

occurs when fireworks are used. Fireworks are made of metals such as magnesium and copper. These change chemically as they light up the sky.

Is it a chemical or physical change?

Sugar dissolving in tea

•Chemical Change

•Physical Change

Correct!

PHYSICAL!

Is it a chemical or physical change?

Logs burning

•Chemical Change

•Physical Change

Correct!

CHEMICAL!

Is it a chemical or physical change? Breaking water up by separating

it into hydrogen and oxygen

•Chemical Change

•Physical Change

Correct!

CHEMICAL!

Is it a chemical or physical change?

Cutting paper

•Chemical Change

•Physical Change

Correct!

PHYSICAL!

Is it a chemical or physical change?

Crushing an aspirin

•Chemical Change

•Physical Change

Correct!

PHYSICAL!

Is it a chemical or physical change?

Metal rusting

•Chemical Change

•Physical Change

Correct!

CHEMICAL!

Is it a chemical or physical change?

An egg rotting

•Chemical Change

•Physical Change

Correct!

CHEMICAL!