Classify the Following Changes As Chemical Or Physical Changes, and Provide a Reason For

Chemical and Physical Change Worksheet Name:______

Classify the following changes as Chemical or Physical Changes, and provide a reason for your answer: Change Chemical or Physical Reason

You cut your hair Physical It’s still hair

Mixing sugar and water Physical Even if sugar is dissolved in water, it’s still the same substance. No new substance is created.

Making a peanut, pretzel and Physical Still peanuts, pretzels and cereal cereal mixture

Baking soda reacts with Chemical Difficult to reverse, gas is formed vinegar and forms a gas

A piece of metal is bent in Physical Able to bend it back to its original form half

Methanol is burned and Chemical Unable to reverse leaves a residue New substance is formed

An aspirin is crushed into Physical Changing from solid into powder but still fine powder aspirin

Copper turns green when Chemical Colour change, new substance is formed exposed to the environment

Two clear liquids are mixed Chemical Colour change and a yellow color forms

Baking cookies Chemical Hard to reverse Chemical and Physical Change Worksheet Name:______

Diamonds are used to scratch Physical Can fix the glass, still glass glass

A tree burns to form ashes Chemical Can’t reverse this, new substance is formed (soot)

Water freezes to form ice Physical Can reverse by melting

Glass Breaking Physical Can fix the glass, still glass

Water evaporates into steam Physical Reverse by condensation, still water

A piece of apple rots on the Chemical Can’t reverse this process ground

A bicycle chain rusts Chemical Can’t reverse, new substance formed (rust)

In the table below, come up with two examples each for a physical change, and a chemical change. Give examples that have not already been provided. Physical Change Chemical Change

Ice melting to water Bleaching hair

Dying hair Frying an egg