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Understanding the SI Metric System: Measurements, Conversions, and Units

The SI metric system, also known as the International System of Measurement, uses base units like meters, liters, grams, and seconds to provide a common language for scientists. It simplifies measurements through the use of prefixes that denote multiples of ten, such as kilo-, milli-, and centi-. This guide provides a comprehensive overview of measuring distance, mass, and temperature, along with conversion methods using the ladder method for ease of calculation. Learn to accurately convert units and compare measurements using the metric system.

sydney-greer
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Understanding the SI Metric System: Measurements, Conversions, and Units

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  1. Measurement & Metrics

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

  3. (2013)

  4. Why is the Metric System better?

  5. Common Languageused by all scientists

  6. Based on multiples (units) of 10

  7. Multiply or divide by 10’s when converting

  8. We only move the decimal point when converting

  9. PREFIXES • determine “how many” of a unit • kilo- • milli- • centi-

  10. BASE UNITS • METER • LITER • GRAM • SECOND • DEGREES CELSIUS

  11. METER = m • measuresdistance or length • LENGTH:the distance between two points • Measure with metric ruler or meter stick

  12. LITERS = L Measure with graduated cylinder

  13. length X width X height

  14. GRAMS = g

  15. GRAMS = g • Measure mass withtriple beam balance

  16. oCELSIUS = oC • Measures temperature

  17. Measured with a thermometer

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

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

  20. Metric Conversions Ladder Method T.

  21. 1 2 3 MetersLitersGrams 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. Starting Point Ending Point __. __. __. 2 3 1 Ladder Method KILO1000 HECTO100 DEKA10 DECI0.1 CENTI0.01 MILLI0.001 4 km = _________ m How many jumps does it take? 4. = 4000 m

  22. Compare using <, >, or =. 56 cm 6 m 7 g 698 mg Conversion Practice 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

  23. 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

  24. 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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