Mass is the amount of matter in an object. It is measured in kilograms (kg). The more matter an object has, the greater its mass.

Volume is the amount of space an object takes up. It is measured in cubic meters (m³). The more space an object takes up, the greater its volume.

The relationship between mass and volume is called density. Density is defined as the mass of an object per unit volume. It is measured in kilograms per cubic meter (kg/m³).

The density of an object depends on the type of matter it is made of. For example, lead is denser than aluminum. This means that lead has more mass per unit volume than aluminum.

The mass and volume of an object can be used to calculate its density. To calculate the density of an object, divide its mass by its volume.

For example, if an object has a mass of 10 kg and a volume of 2 m³, its density is 5 kg/m³.