Chemical vs. Physical 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 changing 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

Can you give an example of a physical change?

Back

Blending fruits together is an example of a physical change.

Front

Can you give an example of a chemical change?

Back

Burning wood is an example of a chemical change.

Front

What happens to the substances in a physical change?

Back

The substances remain the same, just their form or appearance changes.

Front

What happens to the substances in a chemical change?

Back

The substances change into different substances with new properties.

Front

What is the flame test used for?

Back

The flame test is used to identify the presence of certain gases, like hydrogen.

Front

What does hydrogen do in a flame test?

Back

Hydrogen makes a 'pop' sound when ignited.

Front

Is mixing air into egg whites a physical or chemical change?

Back

Mixing air into egg whites is a physical change.

Front

Why is blending fruits considered a physical change?

Back

Because the same fruits are still present after blending, just in a different form.