Pound

A pound is a common unit for measuring how heavy something is, used mainly in the United States and the United Kingdom and closely linked to kilograms and ounces.

Liter (L)

A liter is a metric unit for measuring liquid volume, used every day for drinks, fuel and more, and it helps you compare how much space liquids take up.

Light Year

A light year is a huge distance unit that tells how far light travels in space in one year, helping us measure the size of the universe.

Length

Length is the measure of how long something is in space, which helps us compare sizes and know how far things are from one another.