Big Idea 9: 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

Give an example of a physical change.

Back

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

Front

Give an example of a chemical change.

Back

An example of a chemical change is burning wood.

Front

What happens to the size of a balloon when it deflates?

Back

The size of the balloon decreases, which is a physical change.

Front

What is the result of cracking an egg?

Back

Cracking an egg is a physical change because it does not change the chemical structure of the egg.

Front

What type of change occurs when water boils?

Back

Boiling water is a physical change because it changes from liquid to gas without creating a new substance.

Front

What is the effect of stomach acid on food?

Back

Stomach acid breaking down food is a chemical change because it alters the chemical structure of the food.

Front

What happens when marshmallows are roasted?

Back

Roasting marshmallows is a chemical change because it creates new substances with different properties.

Front

What is an example of a change in state?

Back

An example of a change in state is water freezing into ice.