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Published byBethany O’Connor’ Modified over 4 years ago

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SI Measurements (also known as “metric system”) “SI” stands for “System International” or “International System of Measurement”

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(2013)

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Why is the Metric System better?

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–Common Language for scientists –Based on units of 10 –Multiply or divide when converting units( move the decimal point) –Prefixes determine “how much” of a unit

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–Common Language used by all scientists

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–Based on multiples (units) of 10

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–Multiply or divide by 10’s when converting

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–We only move the decimal point when converting

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–determine “how many” of a unit –kilo- –milli- –centi- PREFIXES

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BASE UNITS METER LITER GRAM SECOND DEGREES CELSIUS

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METER = m measures distance or length LENGTH:the distance between two points metric ruler or meter stickMeasure with metric ruler or meter stick

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LITERS = L volumemeasures volume — how much space something takes up Measure with graduated cylinder Or with a rulerOr with a ruler (length x height (length x height x width) cm x width) cm

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LITERS = L Measure with graduated cylinder

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length X width X height

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g GRAMS = g

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triple beam balanceMeasure mass with triple beam balance

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o C o CELSIUS = o C Measures temperature

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thermometer Measured with a thermometer

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PREFIXES 1000 k = kilo- (means “1000”) 100 h = hecto-(means “100”) 10 da = deca-(means “10”) BASE UNIT (liter, meter, gram) 1/10” or 0.1 d = deci-(means “1/10” or 0.1) 1/100 c = centi- (means “1/100” or.01) 1/1000 m = milli- (means “1/1000” or.001)

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Easy way to remember the order of prefixes: Kids Have Dreams But Dreams Cost Money

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Metric Conversions Ladder Method T.

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KILO 1000 HECTO 100 DEKA 10 DECI 0.1 CENTI 0.01 MILLI 0.001 Meters Liters Grams Ladder Method 1 st – Determine your starting point. 2 nd – Count the “jumps” to your ending point. 3 rd – Move the decimal the same number of jumps in the same direction. 4 km = _________ m 1 2 3 How many jumps does it take? Starting Point Ending Point 4. 1 __. 2 3 = 4000 m

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Try these conversions using the ladder method. 1000 mg = _______ g 1 L = _______ mL 160 cm = _______ mm 14 km = _______ m109 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 _____ 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

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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

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