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 chopping.

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 burning wood a physical or chemical change?

Back

Chemical change.

Front

Is smashing cookies a physical or chemical change?

Back

Physical change.

Front

Is chopping food a physical or chemical change?

Back

Physical change.

Front

Is frying eggs a physical or chemical change?

Back

Chemical change.

Front

Is food digestion a physical or chemical change?

Back

Chemical change.

Front

What happens to the molecules during a physical change?

Back

The molecules may change their arrangement or state (solid, liquid, gas) 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

Melting ice.