Physical and Chemical Changes

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances, involving a rearrangement of atoms.

Front

Give an example of a physical change.

Back

Melting ice is an example of a physical change.

Front

Give an example of a chemical change.

Back

Rusting of iron is an example of a chemical change.

Front

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

Back

A physical change does not change the substance's chemical identity, while a chemical change results in the formation of new substances.

Front

Is boiling water a physical or chemical change?

Back

Boiling water is a physical change.

Front

Is souring milk a physical or chemical change?

Back

Souring milk is a chemical change.

Front

What happens to the molecules during a physical change?

Back

The molecules may change their state or appearance, but their chemical structure remains the same.

Front

What happens to the molecules during a chemical change?

Back

The molecules undergo a chemical reaction, resulting in the formation of new substances with different properties.

Front

What is an example of a reversible physical change?

Back

Freezing and melting of water is an example of a reversible physical change.