Density: mass in a space

Density tells us the mass in each unit of volume.

MASS

Measure with a balance.

VOLUME

For a block: length × width × height.

DENSITY = MASS ÷ VOLUME

A block has mass 72 g and volume 24 cm³.

Density = 72 ÷ 24 = 3 g/cm³.

Each cubic centimetre has a mass of 3 g.