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Measurement-A Common Language Length

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A Standard Measurement System The Metric System

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When and why was the metric system invented? The metric system was invented in 1790 The metric system was invented because countries were using many different systems of measurement causing confusion and lack of consistency

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Who invented the metric system? The metric system was invented by a group of French scientists

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Metric System A system of measurement used by the majority of countries on Earth based on the number 10

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A Standard Measurement System The International System of Units (SI)

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Scientists all over the world use the International System of Units to measure: Length Volume Mass Density Temperature Time

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Figure 1: Calculating - How much larger is a kilo- than a deka-? 100 times

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Reading Checkpoint (page 45): SI units are based on multiples of what number? SI units are based on multiples of 10 Add a zero Subtract a zero

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Key Concept: Why do scientists use a standard measurement system? Using SI as the standard system of measurement allows scientists to compare data and communicate with each other about their results Using SI measurement also allows experiments to be repeated and most importantly achieve a desired result

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Length

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What is length? Length is the distance from one point to another

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Length Units of Length

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The basic unit of length in the SI system is the … The basic unit of length in the SI system is the meter

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The two units that measure the length of smaller objects are, … millimeter centimeter

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Complete the Table Below PrefixMeaningUnit of Length milli one-hundredth meter one-thousand

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Complete the Table Below PrefixMeaningUnit of Length milliOne-thousandth one-hundredth meter one-thousand

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Complete the Table Below PrefixMeaningUnit of Length milliOne-thousandthmillimeter one-hundredth meter one-thousand

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Complete the Table Below PrefixMeaningUnit of Length milliOne-thousandthmillimeter centione-hundredth meter one-thousand

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Complete the Table Below PrefixMeaningUnit of Length milliOne-thousandthmillimeter centione-hundredthcentimeter meter one-thousand

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Complete the Table Below PrefixMeaningUnit of Length milliOne-thousandthmillimeter centione-hundredthcentimeter nonemeter one-thousand

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Complete the Table Below PrefixMeaningUnit of Length milliOne-thousandthmillimeter centione-hundredthcentimeter noneonemeter one-thousand

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Complete the Table Below PrefixMeaningUnit of Length milliOne-thousandthmillimeter centione-hundredthcentimeter noneonemeter kiloone-thousand

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Complete the Table Below PrefixMeaningUnit of Length milliOne-thousandthmillimeter centione-hundredthcentimeter noneonemeter kiloone-thousandkilometer

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Length Measuring Length

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The longer lines on the metric ruler are called… centimeters

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The shorter lines on the metric ruler are called… millimeters

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Reading Checkpoint (page 48) One centimeter is divided into how many millimeters? 10 millimeters (mm)

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Figure 2: Calculating: Measure the turtle in figure 2 from the rear of its shell to the tip of its nose. Record its length in both centimeters and millimeters. 10.5 cm 105 mm

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What is….. 8850m tall?

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Mount Everest…. The highest point on earth!

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What is… 10,924 meters deep?

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The challenger deep in the Marianas trench…. The deepest part of the ocean!

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What is…. 190,000,000 km?

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The distance from the earth to the sun!

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What is….. 3,500,000,000 years old?

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The oldest bacteria fossil!

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