Physical vs. 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 breaking.

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 digestion.

Front

Give an example of a chemical change.

Back

Fireworks exploding is an example of a chemical change.

Front

Give an example of a physical change.

Back

A glass cup falling from the counter and shattering is an example of a physical change.

Front

What happens during a chemical change?

Back

During a chemical change, the original substances are transformed into new substances with different properties.

Front

What is an indicator of a chemical change?

Back

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

Front

Is melting ice a physical or chemical change?

Back

Melting ice is a physical change because it changes from solid to liquid without altering its chemical composition.

Front

Is burning wood a physical or chemical change?

Back

Burning wood is a chemical change because it produces new substances such as ash and smoke.

Front

What is the significance of the Statue of Liberty turning green?

Back

The Statue of Liberty turning green is an example of a chemical change due to the reaction of copper with oxygen and moisture in the air.

Front

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

Back

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