Physical and Chemical Changes

What is a physical change?

• A physical change is a change in which the form of matter is altered, but one substance is not transformed into another different substance.

• A physical change is a change in which the form of matter is transformed into a different substance.

• A physical change involves a change in temperature only.

• A physical change is irreversible.

Give an example of a physical change.

• Freezing water into ice cubes

• Burning paper into ashes

• Melting ice into water

• Boiling water into steam

What is a chemical change?

• A chemical change is a process in which one or more substances are converted into different substances with different properties.

• A chemical change involves only a change in color.

• A chemical change is reversible.

• A chemical change is a physical transformation of a substance.

Provide an example of a chemical change.

• Boiling water

• Iron rusting

• Mixing salt and sugar

• Cutting paper

How can you differentiate between a physical and a chemical change?

• Physical changes involve a change in state, while chemical changes do not.

• Physical changes are irreversible, while chemical changes are reversible.

• Physical changes are reversible, while chemical changes are irreversible.

• Physical changes involve a change in color, while chemical changes do not.