Front

What are physical changes?

Back

Changes that do not alter the chemical composition of a substance, such as melting, freezing, or evaporating.

Front

What is a physical property?

Back

Characteristics of a substance that can be observed with the senses, such as color, odor, and density.

Front

What is a chemical change?

Back

A change that results in the formation of new chemical substances, such as rusting or burning.

Front

What is density?

Back

Density is the mass of a substance divided by its volume, often used to determine purity.

Front

Give an example of a physical change.

Back

Melting ice or boiling water.

Front

Give an example of a chemical change.

Back

Burning wood or baking a cake.

Front

What is the difference between physical and chemical properties?

Back

Physical properties can be observed without changing the substance, while chemical properties can only be observed during a chemical reaction.

Front

What happens to the molecules during a physical change?

Back

The molecules rearrange but do not change their chemical structure.

Front

What is an extrinsic property?

Back

A property that depends on the amount of substance present, such as mass or volume.

Front

What is an intrinsic property?

Back

A property that does not depend on the amount of substance, such as density or boiling point.