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Key
Idea
The meter is the
basic unit of length
in the metric
system. |
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Vocabulary
• meter
• centimeter
• millimeter
• kilometer |
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Materials
• metric ruler |
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Metric Units of Length |
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What units are used to measure
length in the metric system? |
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1 meter |
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1 centimeter |
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1 millimeter |
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1 kilometer |
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about the length
of a bat |
about the length of an ant |
about the thickness of
a dime |
about the length of
4 city blocks |
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Write mm, cm, m, or km to
complete the following
sentence. |
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A paper clip is about 5  long,
and a door is about 2 high. |
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A paper clip is 5 cm long, and
a door is about 2 meters high. |
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| What metric unit of length would be most appropriate to measure the distance between two cities? |
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| The kilometer is the most appropriate since the other units are so small. |
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What is the length to the nearest centimeter and to the nearest
millimeter? The smallest units represent millimeters. |
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Nearest centimeter: 11 cm |
Nearest millimeter: 114 mm |
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Talk About It |
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| 1. Where is 0 centimeters on the ruler in Example C? |
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