Week 11 F&C Chemical and Physical Changes 2

A change that creates a new substance

A change where the substance stays the same but its form changes

A change where heat is always produced

A change that always involves rust

Milk turning sour

Ice melting in a drink

Breaking a piece of chalk

Salt dissolving in water

Physical change

Chemical change

Both physical and chemical

Neither

Water freezing into ice

Metal rusting over time

Salt dissolving in water

Breaking a pencil in half

A substance changes its size or shape, but not its chemical makeup

Two or more substances combine, but they remain the same

A new substance is formed, with different properties from the original

The substance changes from solid to liquid

Toasting bread

Baking a cake

Cutting a piece of string

Frying an egg

Physical change

Chemical change

No change

Only a temperature change

Change in color

Formation of bubbles

Change in state (solid, liquid, gas)

Release of heat or light

Physical change

Chemical change

Both physical and chemical

Neither

The substance completely changes into something new.

No new substance is created; the material just changes form.

Physical changes only happen at high temperatures.

Physical changes are irreversible.