Physical and chemical changes

Front

What is a chemical change?

Back

A chemical change is a process where one or more substances are transformed into new substances with different properties.

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

Give an example of a chemical change.

Back

Examples include fizzing, foaming, burning, and exploding fireworks.

Front

Give an example of a physical change.

Back

An example is salt dissolving in water.

Front

What happens during a chemical change?

Back

During a chemical change, new substances are formed, and the original substances lose their properties.

Front

What happens during a physical change?

Back

During a physical change, the substance may change in form or appearance, but its chemical composition remains the same.

Front

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

Back

A physical change does not create a new substance, while a chemical change does.

Front

What is an indicator of a chemical change?

Back

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

Front

What is an indicator of a physical change?

Back

Indicators include changes in state (solid, liquid, gas), shape, or size without a change in chemical composition.

Front

Can a chemical change be reversed?

Back

Most chemical changes are not easily reversible, unlike physical changes which often can be reversed.