Physical and Chemical Changes

Front

What is a physical change?

Back

A physical change is a change in which the form or appearance of a substance changes, but its chemical composition remains the same.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances, indicating a change in the chemical composition.

Front

Give an example of a physical change.

Back

Boiling water is an example of a physical change.

Front

Give an example of a chemical change.

Back

Burning gasoline in a car engine is an example of a chemical change.

Front

What happens to the composition of a substance during a physical change?

Back

The composition of the substance remains the same during a physical change.

Front

What happens to the composition of a substance during a chemical change?

Back

The composition of the substance changes during a chemical change.

Front

What is evidence of a physical change?

Back

Evidence of a physical change includes changes in state, shape, or appearance, such as ice melting into water.

Front

What is evidence of a chemical change?

Back

Evidence of a chemical change includes color change, gas production, or the formation of a precipitate.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change alters the form of a substance without changing its identity, while a chemical change transforms the substance into a different one.

Front

What is an example of a substance undergoing a chemical change?

Back

Iron rusting is an example of a substance undergoing a chemical change.