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Title:Metric System
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1. What are the base units in the
metric system (M.S.)?
2. How do you convert metric units?
3. Why is the M.S. used in the world
of science?
Essential Questions: (E.Q.)
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• �Almost all other countries are using the metric system
• Other countries’ companies are refusing to buy products from the
U.S.A. if not labeled in metric units
• Scientists need a universal � way to communicate data (SI Units or M.S.)
WHY SHOULD WE USE THE METRIC SYSTEM?
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Base Units
Meter
Liter
Gram
My
Large
Giraffe
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Length= Meter
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1 millimeter (1 mm)
About the thickness of a dime
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1 centimeter (1 cm)
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1 kilometer (1 km)
About the length of 10 football fields
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Volume = Liter
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1 liter (1 L)
1 liter of coke
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1 milliliter (1 mL or 1 ml) Capacity of an eyedropper
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1 kiloliter (1kL or 1 kl)
About the capacity of
4 bathtubs
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Mass = Gram
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1 gram (1 g)
About the mass of a paperclip
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1 milligram (1 mg) About the mass of a grain of sand
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1 kilogram (1 kg)
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The Metric (SI) system is based on multiples of 10!
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Metric Conversion Mnemonic
• KKing (kkilo, 1,000)
• HHenry (hhecto, 100)
• DDied (ddeka, 10) abbreviation-(dk)
• UUnexpectedly (UUnit (Liter, meter, gram)
• DDrinking (ddeci 1/10)
• CChocolate (ccenti 1/100)
• MMilk (mmilli, 1/1,000)
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HECTO100
Units
KILO1000Units DEKA
10Units
DECI0.1
UnitCENTI
0.01Unit
MILLI0.001Unit
MetersLitersGrams
House Method
How do you use the “house” method?
1st – Determine your starting point.
2nd – Count the “jumps” to your ending point.
3rd – Move the decimal the same number of jumps in the same direction.
4 km = _________ m
12
3
How many jumps does it take?
Starting Point Ending Point
4.1
__.2
__.3
__. = 4000 m
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Kilo Hecto Deka Gram deci centi milli
Practice Problem 1
How many mg are in 3.6 Kg?
Starting point Final Destination
3,600,000 mg6 places to the right of the decimal point
3.6 kg 36.0 hectogra
m
360. 0 dekagrams
3600. 0 grams 360000.
0centigrams
3600000.0 milligrams
36000. 0 decigrams
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Kilo Hecto Deka Meter deci centi milli
Practice Problem 2
How many hm are in 12.67 mm?
Starting pointFinal Destination
0.0001267 hm5 places to the left of the decimal point
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Stop Here
Please!
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Try these conversions using the ladder method.
1000 mg = _______ g 1 L = _______ mL 160 cm = _______ mm
14 km = _______ m 109 g = _______ kg 250 m = _______ km
Conversion Practice
Compare using <, >, or =.
56 cm 6 m 7 g 698 mg
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Write the correct abbreviation for each metric unit.
1) Kilogram _____ 4) Milliliter _____ 7) Kilometer _____
2) Meter _____ 5) Millimeter _____ 8) Centimeter _____
3) Gram _____ 6) Liter _____ 9) Milligram _____
Try these conversions, using the ladder method.
10) 2000 mg = _______ g 15) 5 L = _______ mL 20) 16 cm = _______ mm
11) 104 km = _______ m 16) 198 g = _______ kg 21) 2500 m = _______ km
12) 480 cm = _____ m 17) 75 mL = _____ L 22) 65 g = _____ mg
13) 5.6 kg = _____ g 18) 50 cm = _____ m 23) 6.3 cm = _____ mm
14) 8 mm = _____ cm 19) 5.6 m = _____ cm 24) 120 mg = _____ g
Metric Conversions
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Compare using <, >, or =.
25) 63 cm 6 m 27) 5 g 508 mg 29) 1,500 mL 1.5 L
26) 536 cm 53.6 dm 28) 43 mg 5 g 30) 3.6 m 36 cm