Which term describes the ratio of mass to volume?

Which term describes the ratio of mass to volume?

• A. Density
• B. Mass
• C. Volume
• D. Temperature

Answer: (A)

Density describes how much matter is packed into a given amount of space. It is defined as density = mass / volume, so it tells you how heavy something is for its size. This ratio lets you compare materials: for objects with the same volume, the one with more mass has higher density; for the same mass, the object with less volume has higher density. Common units include g/cm^3 for solids and kg/m^3 for liquids and gases. You find density by measuring mass with a scale and volume with a ruler or graduated cylinder, or by water displacement for irregular shapes. Temperature can affect density because materials expand with heat, but the core idea remains mass per unit volume. The other terms don’t describe this ratio: mass is the amount of matter, volume is the space it occupies, and temperature relates to heat energy.

Density describes how much matter is packed into a given amount of space. It is defined as density = mass / volume, so it tells you how heavy something is for its size. This ratio lets you compare materials: for objects with the same volume, the one with more mass has higher density; for the same mass, the object with less volume has higher density. Common units include g/cm^3 for solids and kg/m^3 for liquids and gases. You find density by measuring mass with a scale and volume with a ruler or graduated cylinder, or by water displacement for irregular shapes. Temperature can affect density because materials expand with heat, but the core idea remains mass per unit volume. The other terms don’t describe this ratio: mass is the amount of matter, volume is the space it occupies, and temperature relates to heat energy.