unit 2.2 si units/metric conversions. si units si = international system of metric units. base unit...
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UNIT 2.2SI UNITS/METRIC CONVERSIONS
SI UNITS
SI = International system of metric units.
Base unit = all other units are multiples of base units or combinations)
Quantity Written unit Symbol
length
mass
time
amount of substance
SI UNITS
2. MULTIPLES OF BASE UNITS (p.17)** Need to know this table
Written Prefix
Symbol Exponential
mega M 106
kilo k 103
deci d 10-1
centi c 10-2
milli m 10-3
micro μ 10-6
106
103
10-1
10-2
10-3
10-6
2.2 SI UNITS
3. IMPORTANT EQUIVALENCES
1 mL = 1 cm3
1 m3 = 103 L
1 t = 103 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.
METRIC 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
METRIC CONVERSIONS
How many decilitres in 0.5kL?
MULTI CONVERSION
Convert 1cg/ mL into dg/L
METRIC CONVERSIONS
DERIVED QUANTITIES
Derived quantity =
Derived unit =
DENSITY
Density is an example of a derived unit What is density?
Density =
DERIVED UNITS: DENSITY
Given that a 2.44 cm3 sample of an element has a mass of 47.14 g. Determine the density of the element.
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
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!