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• The density of an object or substance is its mass divided by its volume: Density = Mass ÷ Volume.

• The units of density depend on the units used for mass and volume, but are usually: ��/����³ (if mass is measured in g and volume in cm³).

• The more dense a substance is, the heavier it feels for its size.

Density values

The densities of some everyday substances are:

• Steel has a density of 7.82 ��/����³

• Water has a density of 1.00 ��/����³

• Air has a density of 0.0013 ��/����³

These values show that the steel (solid) is the most dense while the air (gas) is the least dense.

Density values

The densities of some everyday substances are:

• Steel has a density of 7.82 ��/����³

• Water has a density of 1.00 ��/����³

• Air has a density of 0.0013 ��/����³

These values show that the steel (solid) is the most dense while the air (gas) is the least dense.

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