Units of measurement for various physical quantities: - Weight is the force exerted on a mass due to gravity. The SI unit of force is Newton (N) (ii). Although weight is often measured using scales calibrated in kilograms, this measures mass based on standard gravity. - Volume is the amount of space occupied by a substance or object. The SI unit of volume is the cubic meter (m³) (i). - Temperature is a measure of the degree of hotness or coldness of an object. The SI unit of thermodynamic temperature is the Kelvin (K) (iv). Celsius and Fahrenheit are also commonly used scales. - Pressure is the force applied perpendicular to the surface of an object per unit area over which that force is distributed. The SI unit of pressure is the Pascal (Pa) (iii).