Chemical & Physical Changes (Benchmark #2)

freezing water

burning wood

boiling an egg

mixing baking soda with vinegar

no new substance is made

a new substance is created

the properties of the substance change

none of them are reversible

burning firewood

baking a cake

sodium and chlorine combining to make salt

dissolving sugar in water

3. An iron nail becomes orange and flaky on the surface.

2. A wooden pencil is sharpened and breaks.

1. Long hair is cut and dried.

1. An ice cube melts and becomes a clear liquid.

cracking an egg

boiling an egg

boiling water

a popsicle melting

melting butter

rusting of iron

evaporating water

chopping vegetables

they are always reversible

they involve a change in state of matter only

they result in the formation of new substances

only the shape changes

decaying fruit

grinding coffee beans

burning a candle

burning toast