7.2 The Metric System: Length What are your objectives for Section 7.2? How can you accomplish each objective? 1 Learn the Basic Units of Length • Know what a meter represents by looking at the pictures of common objects, and understand the different associated prefi xes. • Memorize the Relationships Between Metric Units of Length. • Complete the given examples on your own. • Complete You Trys 1 and 2. 2 Use Unit Fractions to Convert Between Units • Use the same procedure for using unit fractions as done previously. • Complete the given example on your own. • Complete You Try 3. 3 Convert Between Units Using the Metric Conversion Chart • Understand the metric conversion chart, and be able to reproduce it on your own. • Write the procedure for How to Use the Metric Conversion Chart in your own words. • Follow the example on your own. • Complete You Try 4. Read the explanations, follow the examples, take notes, and complete the You Trys. 1 Learn the Basic Units of Length Before the late 1700s, different countries used different units of measurement, which led to diffi culties trading between countries. In the 1790s, the French Academy of Science developed a simpler system of measurement, based on multiples of 10, called the metric system. This system was adopted by almost all countries around the world. It made both measuring and trade easier. Although the United States still uses its own system of feet, cups, pounds, and so on, most scientifi c measurement in the United States is done in metric units. Note The metric system is also called the International System of Units, or SI for short. The basic unit of length in the metric system is the meter. A meter is about 39.37 inches long, so it is a little longer than a yard. 0 cm 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 74 76 78 84 86 88 90 Meterstick 0 in. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 80 82 92 94 96 98 100 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 Yardstick 578 CHAPTER 7 Measurement and Conversion www.mhhe.com/messersmith
messersmith_power_prealgebra_1e_ch4_7_10
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