Physical or 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. Examples include changes in state (like melting or freezing), shape, or size.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. It involves a chemical reaction and the rearrangement of atoms. Examples include burning, rusting, and digestion.

Front

Is dissolving sugar in water a physical or chemical change?

Back

Physical change.

Front

What happens to the chemical composition during a physical change?

Back

The chemical composition remains the same during a physical change.

Front

What happens to the chemical composition during a chemical change?

Back

The chemical composition changes during a chemical change, resulting in new substances.

Front

Is freezing water a physical or chemical change?

Back

Physical change.

Front

Is cooking an egg a physical or chemical change?

Back

Chemical change.

Front

What is an example of a physical change that can be reversed?

Back

Melting ice can be reversed by freezing the water again.

Front

What is an example of a chemical change that cannot be reversed?

Back

Burning wood cannot be reversed; it produces ash and smoke.

Front

Is mixing sand and salt a physical or chemical change?

Back

Physical change.