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UNIT 2.2

UNIT 2.2. SI UNITS/METRIC CONVERSIONS. SI UNITS. SI = International system of metric units. Base unit = all other units are multiples of base units or combinations). SI UNITS. 2. MULTIPLES OF BASE UNITS (p.17) ** Need to know this table. 10 6 10 3 10 -1 10 -2 10 -3 10 -6.

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UNIT 2.2

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  1. UNIT 2.2 SI UNITS/METRIC CONVERSIONS

  2. SI UNITS • SI = International system of metric units. • Base unit = all other units are multiples of base units or combinations)

  3. SI UNITS 2. MULTIPLES OF BASE UNITS (p.17) ** Need to know this table

  4. 106 • 103 • 10-1 • 10-2 • 10-3 • 10-6

  5. 2.2 SI UNITS 3. IMPORTANT EQUIVALENCES • 1 mL = 1 cm3 • 1 m3 = 103 L • 1 t = 103 kg

  6. 2.2 SI UNITS Example: • Re-write the expression “6 kilograms” using • PREFIX and UNIT SYMBOLS • an EXPONENTIAL EQUIVALENT • The prefix symbol for kilo is ___ and the unit symbol for grams is ___ • 6 kilograms = • The exponential equivalent to kilo is ____ • 6 kilograms =

  7. METRIC CONVERSIONS • Metric conversions involve using unit conversions between prefix symbols and exponential equivalents. Example: • Write a conversion statement between cm and m.

  8. Metric conversions Write conversion statements between each of the following • dm and m • cs and s • dmol and mol

  9. METRIC CONVERSIONS • How many milligrams are in 5 kg?

  10. METRIC CONVERSIONS • Express 7µm in Megametres

  11. Metric conversions How many decilitres in 0.5kL?

  12. Multi Conversion Convert 1cg/ mL into dg/L

  13. METRIC CONVERSIONS DERIVED QUANTITIES  • Derived quantity = • Derived unit =

  14. Density • Density is an example of a derived unit • What is density? • Density =

  15. Derived units: density • Given that a 2.44 cm3sample of an element has a mass of 47.14 g. Determine the density of the element.

  16. Derived units • Find the volume of a block of wood that has a mass of 34.5 grams. The density of this wood is 12g/cm3

  17. ASSIGNMENT- DUE Tuesday Hebden Page19 #13, 14, 15(a,c,d,f,g,i), Page 21 #16 (a,c,e) #17 (b,d,f,h,j,L,n) #18(a, b, c) Finish ALL the questions on your 2 sheets: A-Measurement and the Metric System This is Homework for marks. Have this done by Tuesday. Show ALLLLL your calculations for every problem!

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