Exploring 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 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 example of a physical change?

Back

Melting ice is an example of a physical change.

Front

What is an example of a chemical change?

Back

Rusting of iron is an example of a chemical change.

Front

What happens to sugar when it dissolves in water?

Back

When sugar dissolves in water, it undergoes a physical change and can be recovered by evaporation.

Front

What is a sign of a chemical change?

Back

Formation of a new substance is a sign of a chemical change.

Front

What is NOT a sign of a chemical change?

Back

Change in state is NOT a sign of a chemical change.

Front

What happens to water when it freezes?

Back

When water freezes, it undergoes a physical change from liquid to solid state.

Front

What is an example of a reversible physical change?

Back

Melting and freezing of ice are examples of reversible physical changes.

Front

What is an example of an irreversible chemical change?

Back

Burning wood is an example of an irreversible chemical change.