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. It involves a chemical reaction and changes the composition of the original substance. Examples include burning, cooking, and rusting.

Front

Is frying an egg a physical or chemical change?

Back

Chemical change.

Front

Is melting ice cream a physical or chemical change?

Back

Physical change.

Front

Is mowing the lawn a physical or chemical change?

Back

Physical change.

Front

Is fireworks exploding a physical or chemical change?

Back

Chemical change.

Front

Is glass breaking a physical or chemical change?

Back

Physical change.

Front

What happens to the molecules during a physical change?

Back

The molecules may change their state or appearance, but their chemical structure remains the same.

Front

What happens to the molecules during a chemical change?

Back

The molecules rearrange to form new substances with different chemical properties.

Front

Give an example of a physical change.

Back

An example of a physical change is ice melting into water.