Chemical vs Physical Change Examples

An ice cube is placed in the sun. Later there is a puddle of water. Later still the puddle is gone.

Physical Change - change in state of matter

Two chemical are mixed together and a gas is produce.

Chemical change - a gas is produced is a SIGN of chemical changes

A bicycle changes color as it rusts.

Chemical change - a change in color is a SIGN of a chemical change

A solid is crushed to a powder.

Physical change - the size is changed

Two substances are mixed and light is produced.

Chemical change - light/heat is produced which is a sign of a chemical change

A piece of ice melts and reacts with sodium.

Ice melting is a physical change (state of matter), reacting with sodium is chemical change

Mixing salt and pepper

Physical change

Chocolate syrup is dissolved in milk

Physical change

A marshmallow is toasted over the fire.

Chemical change - a change in color

A marshmallow is cut in half

Physical change - size is changed