Density

Front

What is density?

Back

Density is a measure of how much mass is contained in a given volume. It is typically expressed in grams per milliliter (g/mL) or kilograms per cubic meter (kg/m³).

Front

What is the formula for calculating density?

Back

The formula for density is: density = mass / volume.

Front

If an object has a density less than that of water (1 g/mL), what will happen when it is placed in water?

Back

The object will float.

Front

If an object has a density greater than that of water (1 g/mL), what will happen when it is placed in water?

Back

The object will sink.

Front

What two measurements are needed to calculate density?

Back

Mass and volume.

Front

How does temperature affect the density of a substance?

Back

Generally, as temperature increases, the density of a substance decreases because the substance expands.

Front

What is the density of pure water at 4°C?

Back

The density of pure water at 4°C is approximately 1 g/mL.

Front

What is the relationship between density and buoyancy?

Back

An object will float if its density is less than the density of the fluid it is in; it will sink if its density is greater.

Front

What is an example of a substance with a density less than water?

Back

Oil is an example of a substance with a density less than water; it floats on water.

Front

What is an example of a substance with a density greater than water?

Back

Lead is an example of a substance with a density greater than water; it sinks in water.