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L12-3 Notes: Length in Metric System
Chapter 12 L12-3 Notes: Length in Metric System
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Vocabulary A meter is the basic unit of length in the metric system.
The metric system is a decimal system of weights and measures.
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Metric Units of Length Unit Model Benchmark
1 millimeter (mm) thickness of a dime mm ≈ 1in 1 centimeter (cm) half the width of a penny cm ≈ 1in 1 meter (m) width of a doorway 1m ≈ 1.1yd 1 kilometer (km) six city blocks 6.2km ≈ 1 mi
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The segment below is 2. 5 centimeters or 25 millimeters long
The segment below is 2.5 centimeters or 25 millimeters long. This is about 1 inch in customary units.
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Use Metric Units of Length
1. Write the metric unit of length that you would use to measure the width of a paper clip. Compare the width of a paper clip to the models described above. The width of a paper clip is greater than the thickness of a dime, but less than half the width of a penny. So, the millimeter is an appropriate unit of measure.
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Use Metric Units of Length
2. Write the metric unit of length that you would use to measure the height of a desk Since the height of a desk is close to the width of a doorway, the meter is an appropriate unit of measure.
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Use Metric Units of Length
3. Write the metric unit of length that you would use to measure distance across Indiana Since the distance across Indiana is much greater than 6 city blocks, this is measured in kilometers.
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On Your Own… Write the metric unit of length that you would use to measure each of the following. 1. width of a CD 2. thickness of a nickel 3. height of a cereal box
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