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**Metric System: Conversion is Easier**

5 miles into feet 5 kilometers into meters Metric System is a Base 10 system (think Scientific Notation!) where decimals move.

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LADDER METHOD Decimal moves to the right. Decimal moves to the left.

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**BASE Decimal moves to the right. Kilo Hecto Deka Deci Centi**

103 Kilo 1000 units 102 Hecto 100 units 101 Deka 10 units 100 BASE 1 unit 10-1 Deci 0.1 units 10-2 Centi 0.01 units 10-3 Milli 0.001 units Decimal moves to the left.

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Conversions: 155cm m 25km m 2km cm 3,400mL L 3.4L mL 256g kg 45kg g Meter Liter Gram Second Base Units: KING HENRY DIED BY DRINKING CHOCOLATE MILK

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**Decimal moves to the right.**

1012 Deci = d Centi = c Milli = m Micro = μ Nano = n Pico = p tera 109 giga 106 1,000,000,000,000 Units mega 103 1,000,000,000 Units Decimal moves to the right. Kilo 102 1,000,000 Units Hecto 101 Base Units: 1,000 Units Deka 100 Units 100 Base 10 Units 10-1 deci 10-2 1 Unit Meter Liter Gram Second centi 10-3 0.1 Units Tera = T Giga = G Mega = M Kilo = k Hecto = h Deka = da Decimal moves to the left. milli 10-6 0.01 Units micro 10-9 0.001 Units nano 10-12 Units pico Units Units

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Assignment Why is a standard international set of units helpful and necessary in science? Should the United States Adopt the Si system of measurement? What changes would this entail? How much would it cost? Convert the Following Units using the stair step method: 360cm _____m mm _____m m _____km ,345cm _____da 400mL _____L L _____mL dL _____mL kL _____ L 934g _____kg kg _____g mg _____g kg _____g Compare using <, > or = to. 56cm m g mg mL L mL L 43mg g cm m ,445mL L kg g The ceiling in Mr. O’Connell’s living room is 2.4 m high. He has installed a new hanging lamp that hangs down 61 cm. He is approximately .175dekameters tall. Will he hit his head on the hanging lamp? Draw a sketch and show your work!

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**Rank each object from the largest weight to smallest weight:**

[1] [2] [3] [4] [5] 4kg 2kg 1kg 1kg 3kg

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**Rank each object from longest to shortest (not drawn to scale).**

Rank each object from heaviest to lightest. 3.2kg 32000g 3200mg 320cg [1] [2] [3] [4] (a) (b) (c) (d) Rank each object from longest to shortest (not drawn to scale). 3.2m 320cm 3300mm 0.032km [1] [2] [3] [4] (a) (b) (c) (d)

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**Rank each object from longest to shortest.**

Rank each object from highest to lowest volume (not drawn to scale). 2L 2001mL 350cL 0.002kL [1] [2] [3] [4] (a) (b) (c) (d) Rank each object from longest to shortest. 3x102cm 3x100m 3x105mm 3x10-1km [1] [2] [3] [4] (a) (b) (c) (d)

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