Chemical and Physical Change

When does a physical change occur?

• when molecules combine to form a compound

• when a new element is created

• when the size, shape, or state of matter changes

• when elements combine to form a molecule

Which is an example of a physical change?

• Baking a cake

• cutting paper

• wood burning

• fireworks exploding

Which is an example of a chemical change?

• breaking an egg

• splitting a log into 2 pieces

• mixing vinegar and baking soda

• cutting a shirt into pieces

Which two answers are key words that describe a physical change?

• Burning

• Dissolving

• Melting

• Ashes

Water freezes to make snow

• Physical

• Chemical

A cake baking

• Physical

• Chemical

Food is digested

• Physical

• Chemical

A puddle of water evaporates

• Chemical

• Physical

Lighting a match

• Physical

• Chemical

Burning your toast

• Physical

• Chemical