Physical & 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 melting, freezing, and dissolving.

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 changes the chemical composition of the substance. Examples include burning, rusting, and tarnishing.

Front

Is melting a chocolate bar a physical or chemical change?

Back

Melting a chocolate bar is a physical change.

Front

Is dissolving Gatorade powder in water a physical or chemical change?

Back

Dissolving Gatorade powder in water is a 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 cutting your hair a physical or chemical change?

Back

Cutting your hair is a physical change.

Front

Is copper tarnishing a physical or chemical change?

Back

Copper tarnishing is a chemical change.

Front

Is wood burning a physical or chemical change?

Back

Wood burning is a chemical change.

Front

What are some indicators of a chemical change?

Back

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