Physical and 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 but does not change its chemical composition. Examples include melting ice or dissolving sugar in water.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. Examples include burning wood or rusting iron.

Front

What happens to the substances in a physical change?

Back

In a physical change, the substances remain the same at the molecular level; their chemical properties do not change.

Front

What happens to the substances in a chemical change?

Back

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

Front

Is melting ice a physical or chemical change?

Back

Melting ice is a physical change.

Front

Is burning wood a physical or chemical change?

Back

Burning wood is a chemical change.

Front

What is an example of a reversible physical change?

Back

An example of a reversible physical change is freezing and melting water.

Front

What is an example of an irreversible chemical change?

Back

An example of an irreversible chemical change is baking a cake.

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 the formation of new substances.

Front

What is an example of a physical change in everyday life?

Back

An example of a physical change is cutting a piece of paper.