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SI Measurement

SI Measurement. Le System international d’Unites Internationally agreed 75 000 not 75, 000 Meters not miles Liters not gallons. Units?. mass length Volume Time Amount of a substance. Other Units. Derived unit – combination of units like in velocity m/s 2 , or pressure kg/m s 2

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SI Measurement

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  1. SI Measurement • Le System international d’Unites • Internationally agreed • 75 000 not 75, 000 • Meters not miles • Liters not gallons

  2. Units? • mass • length • Volume • Time • Amount of a substance

  3. Other Units • Derived unit – combination of units like in velocity m/s2, or pressure kg/m s2 • Density – g/cm

  4. Density • D = m/v • Ratio of mass to volume • The mass divided by the volume • Physical property

  5. Mass • kilogram is the standard • 1000 grams • We use grams – more useful in science class. • King Henry Chart • Remember • Mass measure of matter, does not depend on gravity • Weight – measure of the gravitational pull on the mass

  6. Mass and weight • mass is the amount of matter and will not change with location • Weight is a measure of gravity and will change with location

  7. How to convert • King Henry chart – memorize • King Henry drank uho delicious chocolate milk • Kilo Hecto daka ______deci centi milli

  8. Larger prefixes • Mega • Giga • tera

  9. Smaller prefixes • Micro • Nano • Pico • Femto • atto

  10. Multiple conversions • Affects density, area etc • If the unit is squared, you need to convert twice. • If the unit is cubed you need to convert _______________

  11. Practice • Pg 60. #31-34

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