Chemical and Physical 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 making or breaking bonds between atoms. Examples include rusting, burning, and cooking.

Front

Is freezing chocolate covered bananas a physical or chemical change?

Back

Freezing chocolate covered bananas is a physical change.

Front

What happens when sugar dissolves in water?

Back

When sugar dissolves in water, a physical change occurs.

Front

Is cracking an egg a physical or chemical change?

Back

Cracking an egg is a physical change.

Front

What is an example of a chemical change?

Back

An example of a chemical change is rusting of a bicycle.

Front

What happens during burning sugar?

Back

Burning sugar is an example of 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.

Front

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

Back

A physical change does not alter the chemical composition of a substance, while a chemical change results in new substances being formed.

Front

Can physical changes be reversed?

Back

Many physical changes can be reversed, such as freezing and melting, but some may not be easily reversible.