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**Unit 1: Intro to Earth/Environmental Science**

Metric Conversions

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**What are Metric Conversions?**

Sometimes we need to change from one measurement to another. This is usually done because the unit that is used is either too big or too small for that type of measurement.

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**Sometimes the number is too big for the unit being measured.**

525,568 millimeters Sometimes the number is too big for the unit being measured.

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**Sometimes the number is too small for the unit being measured**

km Sometimes the number is too small for the unit being measured

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**How Do We Fix This Problem?**

We can correct these problems by doing a process called Metric Conversion. When you do a Metric Conversion, you are changing from one unit of measurement to another.

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**So How Do I Do A Metric Conversion?**

We will be using a method called The Stair-step Method of Metric Conversion. It requires you to move the decimal in the number.

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**The Stair-step King-Henry-Died-By-Drinking-Chocolate-Milk**

Kilo- Hecto- Deka- base units Deci- Centi- Milli- Grams, liters,meters King-Henry-Died-By-Drinking-Chocolate-Milk

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**The Stair-step : METER King-Henry-Died-By-Drinking-Chocolate-Milk**

Km Hm Dam M Dm Cm Mm METERS King-Henry-Died-By-Drinking-Chocolate-Milk

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How Do I Use This? 5.0 K m _?_H m -The first letter of the prefix in the unit of measurement tells you which step to start on. -The first letter in the second unit of measurement tells you which step to stop on. -Find which step to start on, and count the number of steps it takes to get to the step that you need to stop on.

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Km Hm Dam M Dm Cm Mm METERS The Stair-step : METER

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**How Do I Use This (cont.)? 5.0 K m _50_H m**

If you went to the right(downstairs) the decimal in the first measurement moves that many places to the right. If you went to the left (upstairs) then the decimal moves to the left. Fill any empty places with zeros. 5.0 K m _50_H m

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mm = ? m The decimal in mm moves three places to the left, becoming m. km = ? m km becomes 6.54 m.

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1.45m ___ cm 1450 145 14.5 0.145 0.0145 :00

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The Stair-step : METER Km- Hm Dam M Dm Cm Mm

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4.0 mm ___ dm 0.04 0.4 4 40 400

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The Stair-step : METER Km- Hm Dam M Dm Cm Mm

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0.022 hm __dam 0.0022 0.22 2.2 22

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Km- Hm Dam M Dm Cm Mm The Stair-step : METER

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0.108 km ___ m 0.0108 1.08 10.8 108 1080

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Km Hm Dam M Dm Cm Mm The Stair-step : METER

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5 km ___ mm .5 500 50,000 5,000,000

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Km- Hm Dam M Dm Cm Mm The Stair-step : METER

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**Know Your Left From Your Right **

Count Up to Six Know Your Left From Your Right King-Henry-Died-By-Drinking-Chocolate-Milk middleschool science.com

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How can we convert metric measurements? Do Now: What is the value of the prefixes kilo, centi, and milli?

How can we convert metric measurements? Do Now: What is the value of the prefixes kilo, centi, and milli?

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