Metric Measurements Page


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Metric prefixes in everyday use

Text
Symbol
Factor
tera
T
1,000,000,000,000
giga
G
1,000,000,000
mega
M
1,000,000
kilo
k
1,000
hecto
h
100
deca
da
10
(unit)
(unit)
1
deci
d
0.1
centi
c
0.01
milli
m
0.001
micro
μ
0.000,001
nano
n
0.000,000,001
pico
p
0.000,000,000,001
femto
f
0.000,000,000,000,001


Distance - length, width height (m - meters)


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Also used for volume of a solid = lengtt x width x height

Submultiples

Multiples
Value
Symbol
Name
Value
Symbol
Name
10−1 m
dm
decimetre
101 m
dam
decametre
10−2 m
cm
centimetre
102 m
hm
hectometre
10−3 m
mm
millimetre
103 m
km
kilometre
10−6 m
µm
micrometre
106 m
Mm
megametre
10−9 m
nm
nanometre
109 m
Gm
gigametre
10−12 m
pm
picometre
1012 m
Tm
terametre
10−15 m
fm
femtometre
1015 m
Pm
petametre
10−18 m
am
attometre
1018 m
Em
exametre
10−21 m
zm
zeptometre
1021 m
Zm
zettametre
10−24 m
ym
yoctometre
1024 m
Ym
yottametre
Common prefixed units are in bold face.

Mass - the amount of space occupied (taken up) by an object

Note: we use "weight" in every day language but this use is not correct
weight is the amount of gravity pull on an object and is measured in newtons (N)

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A person will have different weights on the moon and earth because gravity is stronger on the earth
BUT the same person will have the SAME mass on anywhere because they take up the same space.
Example:
brick with a mass of one kilogram will have a weight of 9.81 newtons (2.2 pounds) on Earth, a weight of 1.62 newtons on teh Moon (0.36 pounds), and a weight of zero newtons (0 pounds) on the International Space Station. But in all cases it's mass will be the same: one kilogram.

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mass scales

Mass Sites

Metric Mass introduction
Khan Academy Mass Introduction video
Grocery Store Metric Measurements
Cooking conversions (metric to imperial)
Metric conversions (metric)





Speed - Velocity, Acceleration


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Speedometer

Velocity


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Acceleration (faster X faster)


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Time


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Months (x28 days), Days (x24 hrs), Hours (x60 min), Minutes (x60 sec), seconds, milliseconds (ms), nanoseconds (us)



Volume

Liquid volume - Litres

How to measure liquid volume

Capacity and Measuring Tools Vocab

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Solid Volume - cubic meters


Length x width x height (depth) - 3D shapes

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Gas (or Air) volume - 1 litre = 1000 cubic centimetres (cm3)


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Why a cruise ship floats - volume and mass - displacement and bouyancy

Multiple
Name
Symbols
Equivalent volume

Submultiple
Name
Symbols
Equivalent volume
100 L
litre
l (ℓ)
L
dm3
cubic decimetre


101 L
decalitre
dal
daL
101 dm3
ten cubic decimetres
10−1 L
decilitre
dl
dL
102 cm3
hundred cubic centimetres
102 L
hectolitre
hl
hL
102 dm3
hundred cubic decimetres
10−2 L
centilitre
cl
cL
101 cm3
ten cubic centimetres
103 L
kilolitre
kl
kL
m3
cubic metre
10−3 L
millilitre
ml
mL
cm3
cubic centimetre
106 L
megalitre
Ml
ML
dam3
cubic decametre
10−6 L
microlitre
µl
µL
mm3
cubic millimetre
109 L
gigalitre
Gl
GL
hm3
cubic hectometre
10−9 L
nanolitre
nl
nL
106 µm3
million cubic micrometres
1012 L
teralitre
Tl
TL
km3
cubic kilometre
10−12 L
picolitre
pl
pL
103 µm3
thousand cubic micrometres
1015 L
petalitre
Pl
PL
103 km3
thousand cubic kilometres
10−15 L
femtolitre
fl
fL
µm3
cubic micrometre
1018 L
exalitre
El
EL
106 km3
million cubic kilometres
10−18 L
attolitre
al
aL
106 nm3
million cubic nanometres
1021 L
zettalitre
Zl
ZL
Mm3
cubic megametre
10−21 L
zeptolitre
zl
zL
103 nm3
thousand cubic nanometres
1024 L
yottalitre
Yl
YL
103 Mm3
thousand cubic megametres
10−24 L
yoctolitre
yl
yL
nm3
cubic nanometre



Watts, Amps, Volts - measuring electrical power


external image watt_1.gif
A Watt is a measure of electric power that depends on amps and volts. The bulb in the middle makes the most light because it uses more watts than the other two. But notice that the bulb on the right is using the same amount of power as the bulb on the left, even though it's using only half of the current. Watts = Volts x Amps

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Voltage (Volts -V) a measure of the amount of how easy or likely it is for electrons to move between negative and positive ends points of a wire, battery or curcuit - this likelihood of electrons to move in a wire is called electric potential - you can also say: how much force is needed to push electrons through a wire or circuit
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battery, circuit, volt meter

Amperage "amps" is a measure of electrical current:
when 6.25 x 10^18 electrons or 6,250,000,000,000,000,000 electrons (this amount of electrons is called 1 coulomb) move past one point in a circuit or wire in one second.
- so how many coloumbs move past a point in a wire in one second = amperage = electrical current

Read more: http://wiki.answers.com/Q/What_is_the_difference_between_amperage_and_voltage#ixzz1O9CBXbMm


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BY THE WAY.....
Does electric current flow form the positively (+) charged end or the negatively (-) charged end of a battery or wire. the answer is different for different situations:
In nature - we say from negative to positive - http://mste.illinois.edu/murphy/HoleFlow/default.html
In a circuit or wire - it's from positive to negative - http://mste.illinois.edu/murphy/HoleFlow/ElectricFluid.html
but this is a mistake - basically electrons move from a place where there is more of them (negative charge) to a place where there are less of them (positive charge)
external image images?q=tbn:ANd9GcRMAruRoz4g_Q58EWdj2gxL4088qLjVaruJxlMS9SYIYnTHRZqvig


A simpler way to say it:
Amperage (a), or current, is a measure of the amount of electrons moving in a circuit.
Voltage (V) is a measure of how much force those electrons are under to go from one part of a wire to another.
Wattage (W) is the amount of power in a wire = amps x volts

What kinds of things do you measure in Watts? (electrical power)
external image e-126-wind_turbine.jpgexternal image kilowatt_meter.jpg
Solar panels (sun energy)
Wind energy
Hydro (water_ power, nuclear power, coal power) Killowatts use per hour in your home

external image airline-18-watt-handwired-combo-amp.jpg

Sound energy for an electric guitar and amplifier

SI multiples for watt (W)||||||~ Submultiples

Multiples
Value
Symbol
Name
Value
Symbol
Name
10−1 W
dW
deciwatt
101 W
daW
decawatt
10−2 W
cW
centiwatt
102 W
hW
hectowatt
10−3 W
mW
milliwatt
103 W
kW
kilowatt
10−6 W
µW
microwatt
106 W
MW
megawatt
10−9 W
nW
nanowatt
109 W
GW
gigawatt
10−12 W
pW
picowatt
1012 W
TW
terawatt
10−15 W
fW
femtowatt
1015 W
PW
petawatt
10−18 W
aW
attowatt
1018 W
EW
exawatt
10−21 W
zW
zeptowatt
1021 W
ZW
zettawatt
10−24 W
yW
yoctowatt
1024 W
YW
yottawatt



Natural ENERGY - JOULES (J)

Energy is the amount of work needed to put a force on another object.
One joule is the amount of energy it takes to lift an object that weighs one Newton a one meter distance. A Newton is the metric unit for weight and is comparable to the weight of a stick of butter or an apple. (1 Newton = 0.445 lbs.)

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How to change joules to KiloJoules

SI multiples for joule (J)||||||~ Submultiples

Multiples
Value
Symbol
Name
Value
Symbol
Name
10−1 J
dJ
decijoule
101 J
daJ
decajoule
10−2 J
cJ
centijoule
102 J
hJ
hectojoule
10−3 J
mJ
millijoule
103 J
kJ
kilojoule
10−6 J
µJ
microjoule
106 J
MJ
megajoule
10−9 J
nJ
nanojoule
109 J
GJ
gigajoule
10−12 J
pJ
picojoule
1012 J
TJ
terajoule
10−15 J
fJ
femtojoule
1015 J
PJ
petajoule
10−18 J
aJ
attojoule
1018 J
EJ
exajoule
10−21 J
zJ
zeptojoule
1021 J
ZJ
zettajoule
10−24 J
yJ
yoctojoule
1024 J
YJ
yottajoule
Common multiples are in bold face

Air Pressure - pascals


external image images?q=tbn:ANd9GcSZDnapcOBbNjNGcaHSKDxhgHqD4rfaDSSeYYzja0-8BmDIkTF8oCW4Y0WXexternal image images?q=tbn:ANd9GcRtEcjDxYUsCNamJMkuwhRmZB_OILsEbW1iu2ffHmd2xHNHJzmRugexternal image images?q=tbn:ANd9GcRzgHjDMYFKUDUKLum6uCdjU0_0ECWEb8J0-iDtWjcS-E7G-ZnrFw
More about weather maps
http://vss.sd22.bc.ca/hpp/courses/geo12/course_material/unit9/U09L04.htm

SUPER LOW PRESSURE WEATHER CONDITIONS

Air pressure in a tornado



A video of real tornadoes



Hurricane Videos




FORCE (gravity and other forces = PUSH)


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Measured in Newtons (N) after the scientist Sir Issac Newton


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Activity page for Metric names and measurements