Physical and Chemical Changes

Front

What is a physical change?

Back

A physical change is a change in an item's properties like its shape, size, or density, without creating a new substance.

Front

What is a chemical change?

Back

A chemical change is a change that creates a new substance, often involving a reaction that emits light, heat, or produces a smell.

Front

Give an example of a physical change.

Back

An example of a physical change is ice melting into water.

Front

Give an example of a chemical change.

Back

An example of a chemical change is copper metal turning green when it oxidizes.

Front

True or False: A physical change can produce a new substance.

Back

False. A physical change does not create a new substance.

Front

What happens to salt when it dissolves in water?

Back

When salt dissolves in water, it undergoes a physical change.

Front

What is the difference between physical and chemical changes?

Back

Physical changes affect the form of a substance, while chemical changes affect its composition.

Front

Is boiling water a physical or chemical change?

Back

Boiling water is a physical change.

Front

What is an indicator of a chemical change?

Back

Indicators of a chemical change include color change, temperature change, gas production, and formation of a precipitate.

Front

What is an example of a reversible physical change?

Back

An example of a reversible physical change is freezing and melting water.