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. Examples include melting, freezing, and dissolving.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. Examples include rusting, burning, and souring of milk.

Front

Is melting ice a physical or chemical change?

Back

Physical change.

Front

Is baking a cake a physical or chemical change?

Back

Chemical change.

Front

What happens to the molecules during a physical change?

Back

The molecules rearrange but do not change their chemical structure.

Front

What happens to the molecules during a chemical change?

Back

The molecules break apart and form new molecules with different chemical structures.

Front

Give an example of a physical change.

Back

Examples include chopping wood, freezing water, or dissolving sugar in water.

Front

Give an example of a chemical change.

Back

Examples include burning wood, cooking an egg, or rusting iron.

Front

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

Back

A physical change does not change the substance's chemical identity, while a chemical change does.

Front

Is cutting a fruit a physical or chemical change?

Back

Physical change.