Which statement correctly defines density?

Which statement correctly defines density?

• A. Mass per volume.
• B. Volume per mass.
• C. Mass multiplied by volume.
• D. Mass added to volume.

Answer: (A)

Density is a measure of how much mass is packed into a given volume. It is found by dividing the mass by the volume: density = mass / volume. This means that for the same volume, a substance with more mass is denser, and for the same mass, a smaller volume is denser. Common units are g/cm^3 for solids and kg/m^3 for many liquids and gases. For example, a chunk of lead has more mass in the same amount of space than a chunk of water, so lead is denser. This idea helps explain why some objects float or sink and why materials feel heavier or lighter for their size.

Density is a measure of how much mass is packed into a given volume. It is found by dividing the mass by the volume: density = mass / volume. This means that for the same volume, a substance with more mass is denser, and for the same mass, a smaller volume is denser. Common units are g/cm^3 for solids and kg/m^3 for many liquids and gases. For example, a chunk of lead has more mass in the same amount of space than a chunk of water, so lead is denser. This idea helps explain why some objects float or sink and why materials feel heavier or lighter for their size.