Measurement

Metric vs Imperial

There are two different measurement systems used: Metric and Imperial

Length

Length is used to measure Distance
Length is the distance between two points.

mm - millimetres
cm - centimetres
m - metres
km - kilometres

Mass

Mass is used to measure Weight
Mass is the amount of matter in an object
Weight is the force exerted on an object by gravity. On Earth mass is equal to weight.

mg - milligrams
g - grams
kg - kilograms
t - tonne

Volume

Volume is used to measure Capacity
Volume is the amount of space that an object takes up.

ml - milliltre
cl - centilitre
l - litre

Time

units

Temperature

Density