Physical / Chemical Change

What is a physical change?

• A change in the state or appearance of a substance without forming a new substance.

• A change that results in the formation of a new substance.

• A change that involves a chemical reaction.

• A change that cannot be reversed.

Which of the following is an example of a physical change?

• A) Burning wood

• B) Melting marshmallows

• C) Rusting iron

• D) Baking a cake

Cutting wood is an example of a ________ change.

• physical

• chemical

• biological

• nuclear

Which of the following processes involves a physical change?

• Dissolving sugar in tea

• Cooking an egg

• Fermenting grapes

• Baking bread

Boiling water is a type of ________ change.

• physical

• chemical

• biological

• nuclear

A chemical change is:

• a change in the state of matter without altering the chemical composition

• a change that results in the formation of new chemical substances

• a temporary change that can be easily reversed

• a change that does not involve any energy change

What is an example of an everyday chemical change shown in the image?

• Corrosion of metal

• Melting of ice

• Boiling of water

• Breaking of glass

What is a clue of a chemical change according to the image?

• A) Energy is produced - heat or light is given off.

• B) Energy is absorbed - heat or light is taken in.

• C) No change in energy.

• D) Energy is lost without any effect.

What is an example of a chemical change involving a change of color?

• Rusting of a car

• Melting of ice

• Boiling of water

• Freezing of juice

What is one clue of a chemical change?

• Change of state

• Change of odour

• Change of size

• Change of shape