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!