*Kiddle Encyclopedia.*

To **measure** something is to give a number to some property of the thing. Measuring something puts the amount of the thing into numbers. Measurement can be written using many different units.

## What can be measured?

Many things can be measured. Some properties of things that can be measured:

**Distance**: For example, distance measurements can be used to answer the following questions;**Weight**: For example, weight measurements can be used to answer the following questions;**Temperature**: For example, temperature measurements can be used to answer the following questions;**Volume**: For example, volume measurements can be used to answer the following questions;**Pressure**: For example, pressure measurements can be used to answer the following questions;- How much air should I put in this automobile tire?
- Will the weather stay good or will we have a storm?
- Will my ears pop when I climb that hill?

One can measure many other things.

## Units of measurement

Most properties are measured using a number and a unit of measurement. The unit of measurement is a standard amount. The number compares the property to that standard amount. This means a tree that is ten times as tall as a meter stick is 10 meters tall.

## Measure theory

There is an advanced part of mathematics that is about measuring things with unusual characteristics. This is called measure theory.

Measurement can be the capacity, how long something is, or distance, etc.