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.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances.

Front

What is an indicator of a chemical change?

Back

Indicators of a chemical change include a change in color, production of gas, formation of a precipitate, or release of heat/light.

Front

Is rusting of iron a physical or chemical change?

Back

Rusting of iron is a chemical 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

Give an example of a physical change.

Back

Tearing paper is an example of a physical change.

Front

Give an example of a chemical change.

Back

Burning wood is an example of a chemical change.

Front

What is the role of temperature in chemical changes?

Back

Temperature changes can indicate a chemical change, as reactions may release or absorb heat.

Front

What is the significance of gas production in a chemical change?

Back

The production of gas is a strong indicator of a chemical change, as it often signifies a reaction has occurred.