Page 161 - DK Children's Encyclopedia

Measuring SEE ALSO

▸ ▸ Ancient Egypt
p.17

We measure things to find a number that shows the ▸ ▸ Astronomy p.32
size or amount of something. Being able to measure ▸ ▸ Clocks p.61
things lets us record and compare them. We use ▸ ▸ Earth p.83

many different types of measurements, as well ▸ ▸ Numbers p.185
as various tools for measuring. ▸ ▸ Volume p.269

Measuring tools
Different tools let us measure time, size, Cup for
distance, speed, weight, and volume. Volume Digital scales measuring
is the amount of three-dimensional space for measuring liquid
weight
something takes up. Clock for
measuring
time

Different-sized
cups for measuring
cooking ingredients

Thermometer
for measuring
temperature

Ruler for Spoons for
Weighing through history measuring measuring
People have always wanted to be able to length small amounts
compare amounts of things. The ancient of ingredients
Egyptians invented their own, very accurate Big and small
system of weights and simple scales to All objects can be measured one way
measure the goods they bought and sold. or another. A box of eggs fits easily on
weighing scales, but the Earth is
so big it can only be weighed using
complicated scientific calculations.

A box of six
eggs weighs Earth weighs
about 10 oz 13.2 billion trillion
(300 g). lbs (5.9 trillion
trillion kg).

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