Physical Properties: Density

What is density?

• Density is a measure of how much space is contained in a given mass.

• Density is a measure of how much weight is contained in a given volume.

• Density is a measure of how much mass is contained in a given volume.

• Density is a measure of how much volume is contained in a given mass.

How is density calculated?

• Volume divided by mass

• Mass divided by volume

• Weight divided by mass

• Density divided by volume

What are the units of density?

• Length/area

• Volume/mass

• Time/speed

• Mass/volume

What is the density of water?

• 2 g/cm^3

• 10 g/cm^3

• 0.5 g/cm^3

• 1 g/cm^3

Which has higher density: a rock or a piece of wood?

• rock

• feather

• cotton ball

• piece of wood

How does temperature affect the density of a substance?

• As temperature increases, the density of a substance generally decreases.

• The density of a substance remains constant regardless of temperature.

• Temperature has no effect on the density of a substance.

• As temperature increases, the density of a substance generally increases.

Explain the concept of buoyancy in relation to density.

• Buoyancy is the downward force exerted by a fluid that supports the weight of an immersed object.

• Buoyancy is not related to the density of the fluid or the object.

• Buoyancy only occurs in solids, not in fluids.

• Buoyancy is the upward force exerted by a fluid that opposes the weight of an immersed object. It is related to the density of the fluid and the object.

What is the density of air compared to the density of water?

• 5.6 kg/m^3

• 2.3 kg/m^3

• 1.2 kg/m^3

• 0.8 kg/m^3

How does the density of an object affect its ability to float or sink in water?

• The shape of the object is the only factor that determines whether it will float or sink in water.

• The density of an object has no effect on its ability to float or sink in water.

• Objects with higher density always float in water.

• The density of an object determines whether it will float or sink in water.

Give an example of a material with high density and one with low density.

• Aluminum and Water

• Gold and Air

• Lead and Styrofoam

• Iron and Cotton