Presentation on theme: "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)"— Presentation transcript:
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) QuantityWritten unitSymbol length mass time amount of substance
SI UNITS 2. MULTIPLES OF BASE UNITS (p.17) ** Need to know this table Written PrefixSymbolExponential megaM10 6 kilok10 3 decid10 -1 centic10 -2 millim10 -3 microμ10 -6
2.2 SI UNITS 3. IMPORTANT EQUIVALENCES 1 mL = 1 cm 3 1 m 3 = 10 3 L 1 t = 10 3 kg
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 =
METRIC CONVERSIONS Metric conversions involve using unit conversions between prefix symbols and exponential equivalents. Example: Write a conversion statement between cm and m.
M ETRIC CONVERSIONS Write conversion statements between each of the following dm and m cs and s dmol and mol
METRIC CONVERSIONS How many milligrams are in 5 kg?
METRIC CONVERSIONS Express 7µm in Megametres
M ETRIC CONVERSIONS How many decilitres in 0.5kL?
D ENSITY Density is an example of a derived unit What is density? Density =
D ERIVED UNITS : DENSITY Given that a 2.44 cm 3 sample of an element has a mass of g. Determine the density of the element.
D ERIVED UNITS Find the volume of a block of wood that has a mass of 34.5 grams. The density of this wood is 12g/ cm 3
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!