This is the amount of matter in an object.
This is different on the Moon because of the force of gravity.
On Earth it is the same as mass.
A measuring jug can measure this.
It is measured in millilitres or litres.
This is the measure of the force of gravity on matter.
A balance or a kitchen scale will tell you this about an object.
It is measured in grams or kilograms.
This is the amount of space an object or substance occupies.
