5/13 Changes and Solutions

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 ice or breaking a window.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. Examples include rusting iron or burning wood.

Front

What happens to the substances in a physical change?

Back

In a physical change, the substances retain their original properties and composition.

Front

What happens to the substances in a chemical change?

Back

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

Front

What is a homogeneous mixture?

Back

A homogeneous mixture is a mixture in which the composition is uniform throughout. Examples include saltwater and air.

Front

What is a heterogeneous mixture?

Back

A heterogeneous mixture is a mixture in which the composition is not uniform throughout. Examples include salad and sand.

Front

What are the two types of mixtures?

Back

The two types of mixtures are homogeneous and heterogeneous.

Front

What is an example of a physical change?

Back

An example of a physical change is freezing water to make ice.

Front

What is an example of a chemical change?

Back

An example of a chemical change is baking a cake, where new substances are formed.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change does not create new substances, while a chemical change does.