Units from the metric system can be used to describe the mass, volume or length of an object. Mass is measured in grams (g) and kilograms (kg). Volume is measured in millilitres (ml) and litres (l).

Key units such as inches, feet, and pounds became entrenched in daily life. Length Weight/Mass Volume Imperial: Fluid ounce (fl oz), pint, quart, gallon The metric system’s simplicity lies in ...