Key learning points

1. Density is calculated using the equation: density = mass ÷ volume.
2. Density is measured in kg/m³ or g/cm³.
3. The volume of water displaced by a submerged object is equal to the volume of the object.
4. The dimensions of a regular cuboid can be measured accurately with Vernier callipers.
5. The volume of a regular cuboid is calculated using the equation: volume = length × width × height.

Keywords

• Density - the mass per cubic metre (m³) or cubic centimetre (cm³) of a material

• Kilograms per cubic metre - the unit for density when mass is measured in kilograms (kg) and volume in cubic metres (m³), written as kg/m³

• Grams per cubic centimetre - the unit for density when mass is measured in grams (g) and volume in cubic centimetres (cm³), written as g/cm³

• Vernier callipers - a device used to measure length precisely

• Micrometer - a device used to measure length to a very high precision

Common misconception