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| A typical tape
measure with both Metric and Imperial units and
two US pennies for comparison. |
Measurement
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. |
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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;
- How far is the city from here?
- How far apart are these two trees?
- How long is this stick?
- Weight:
For example, weight measurements can be used to answer
the following questions;
- What is more heavy, this group of
apples or that group of bananas?
- Did John lose weight in the last
year?
- Will putting this rock in the boat
make the boat sink?
- Temperature:
For example, temperature measurements can be used to
answer the following questions;
- Is it hotter today in London or in
Paris?
- Will this ice turn into water if I
put it inside?
- Is Sally sick? Does Sally have a
fever?
- Volume:
For example, volume measurements can be used to answer
the following questions;
- How many pails of water do I need to
fill up the bath tub?
- How much olive oil do I put in this
food I am making?
- How many blocks can I fit in this
box?
- 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?
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One can measure many other things. |
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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. |
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