v. to find out the size, length, or amount of something
In the U.S. people measure distance in miles, not kilometers.
length
n. a measurement of how long something is
Similar units were used in other countries, but their exact lengths differed from place to place.
confusion
n. a state in which people do not understand
This caused a lot of confusion.
result
n. the outcome of something
The result was the metric system.
equator
n. an imaginary line around the middle of the Earth between the North and South Poles
One meter is one ten-millionth (1/10,000,000) of the distance between the equator and the North Pole.
accept
v. to approve of or agree to something
At first, the people of France did not accept the metric system.
officially
adv. in a formal way
However, they were required to use it officially in 1840.
distance
n. the amount of space between two places
In the U.S. people measure distance in miles, not kilometers.
unit
n. a standard for counting or measuring
Miles, feet, and inches are units of measurement in the imperial system.
imperial
adj. relating to an empire
It is called “imperial” because it was used in the former British Empire.
system
n. a group of related parts that work together
This system is centuries old.
originally
adv. at the beginning
In the imperial system, an inch was originally defined as the width of a thumb.
define
v. to determine or identify the meaning of something
In the imperial system, an inch was originally defined as the width of a thumb.
thumb
n. the short, thick finger that is apart from the other four
In the imperial system, an inch was originally defined as the width of a thumb.
exact
adj. very careful and accurate
Similar units were used in other countries, but their exact lengths differed from place to place.
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