Mass, Volume, and Density

What is density?

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

• Density is the weight of an object divided by its height.

• Density is the amount of space an object occupies.

• Density is the temperature at which a substance melts.

True or False: Density is a physical property that can change with temperature and pressure.

• True. Density can change with variations in temperature and pressure.

• False. Density is a constant property that does not change.

• True. Density is only affected by temperature.

• False. Density is only affected by pressure.

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NGSS.MS-PS1-4

How does density affect the placement of objects in a density column?

• Objects with higher density will float and be found closer to the surface of the density column.

• Objects with lower density will sink and be found closer to the bottom of the density column.

• Objects with higher density will sink and be found closer to the bottom of the density column, while less dense objects will float and be found closer to the surface.

• Density has no effect on the placement of objects in a density column.

True or False: Density can be used to identify an unknown substance.

• True

• False

• Density is irrelevant for identification

• Only in specific cases

What is the relationship between mass, volume, and density?

• Density is the ratio of mass to volume.

• Density is the product of mass and volume.

• Density is the difference between mass and volume.

• Density is the sum of mass and volume.

What is buoyancy and how is it related to density?

• Buoyancy is the ability of an object to float in a fluid, and an object will float if its density is greater than the density of the fluid.

• Buoyancy is the ability of an object to sink in a fluid, and an object will sink if its density is less than the density of the fluid.

• Buoyancy is the ability of an object to float in a fluid, and an object will float if its density is less than the density of the fluid.

• Buoyancy is the ability of an object to remain suspended in a fluid, regardless of its density.

How does the density of a liquid compare to that of a solid?

• Solids are always denser than liquids.

• Liquids are always denser than solids.

• Solids are generally denser than liquids, but ice is an exception.

• Density is the same for both solids and liquids.

True or False: Objects whose molecules are spaced the farthest apart are the most dense.

• True

• False

• It depends on the temperature

• It depends on the pressure

What is the formula for calculating density?

• Density = Mass + Volume

• Density = Mass - Volume

• Density = Mass / Volume

• Density = Mass * Volume

If an object has a mass of 10 grams and a volume of 2 cm³, what is its density?

• 3 grams/cm³

• 4 grams/cm³

• 5 grams/cm³

• 6 grams/cm³