Chemical vs. Physical Changes

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new substances with different properties.

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

Give an example of a chemical change.

Back

The spoiling of milk is an example of a chemical change.

Front

Give an example of a physical change.

Back

Melting ice is an example of a physical change.

Front

What happens to the substances in a chemical change?

Back

In a chemical change, the original substances are transformed into new substances.

Front

What happens to the substances in a physical change?

Back

In a physical change, the original substances remain the same, but their form or appearance may change.

Front

How can you tell if a chemical change has occurred?

Back

Signs of a chemical change include color change, gas production, and the formation of a precipitate.

Front

What is an example of a physical change involving water?

Back

Boiling water is an example of a physical change.

Front

What is the flame test used for?

Back

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

Front

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

Back

Mixing air into egg whites is a physical change.