Unit 4 - Properties of Matter and Bonds

Front

What is a physical property?

Back

A characteristic of a substance that can be observed or measured without changing its chemical composition, such as color, density, or boiling point.

Front

What is a chemical property?

Back

A characteristic of a substance that describes its ability to change into different substances, such as reactivity with acids or flammability.

Front

What does brittleness refer to in materials?

Back

Brittleness is a physical property that describes how easily a material breaks or shatters under stress.

Front

How is density defined?

Back

Density is defined as the mass of a substance divided by its volume (Density = Mass/Volume).

Front

What two measurements are needed to calculate density?

Back

Mass and Volume.

Front

Is measuring the density of a rock a physical or chemical property?

Back

It is a physical property.

Front

What is an example of a physical property?

Back

Examples include color, odor, melting point, and density.

Front

What is an example of a chemical property?

Back

Examples include flammability, reactivity with water, and acidity.

Front

What happens to the density of a substance when it is heated?

Back

Generally, the density decreases as the substance expands when heated.

Front

What is the significance of density in identifying substances?

Back

Density can help identify substances because each substance has a unique density at a given temperature and pressure.