Physical or Chemical Change/Phases

Front

What is the primary difference in molecular arrangement between gases and solids?

Back

In the gas phase, molecules are farther apart than in the solid phase.

Front

What happens to a liquid when it loses heat?

Back

A liquid becomes a solid when there is less heat.

Front

What state of matter has a definite volume but no definite shape?

Back

Liquid.

Front

What type of change occurs when water (H2O) decomposes into hydrogen and oxygen?

Back

Chemical change.

Front

Is baking a cake a physical or chemical change?

Back

Chemical change.

Front

What is a physical change?

Back

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 change that results in the formation of new chemical substances.

Front

What is an example of a physical change?

Back

Melting ice.

Front

What is an example of a chemical change?

Back

Rusting of iron.

Front

What happens to the molecules in a substance during a physical change?

Back

The molecules rearrange but the substance's chemical identity remains the same.