Which term describes how much matter is packed into a given space, typically measured in kilograms per cubic meter?

Which term describes how much matter is packed into a given space, typically measured in kilograms per cubic meter?

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

Answer: (B)

Density is how much matter is packed into a given space. It’s defined as mass per unit volume, ρ = m/V, and in SI units it’s kilograms per cubic meter. This means that when two objects occupy the same volume but are made of different materials, the one with greater mass has the higher density because more matter is packed into the same space. Volume tells you the space, mass tells you how much matter, and density combines them to describe how concentrated that matter is. Buoyancy is the upward force from a fluid and relates to density differences between the object and the fluid, not the basic measure itself. So density is the term that matches the description and units.

Density is how much matter is packed into a given space. It’s defined as mass per unit volume, ρ = m/V, and in SI units it’s kilograms per cubic meter. This means that when two objects occupy the same volume but are made of different materials, the one with greater mass has the higher density because more matter is packed into the same space. Volume tells you the space, mass tells you how much matter, and density combines them to describe how concentrated that matter is. Buoyancy is the upward force from a fluid and relates to density differences between the object and the fluid, not the basic measure itself. So density is the term that matches the description and units.