Download - The Metric System
SI Units
THE METRIC SYSTEM
METRIC SYSTEM EST. 1797
WORLD-WIDE ADOPTION
= -
WHY SWITCH?
1 pound = 16 ounces
WHY SWITCH?
12 inches = 1 foot
3 ft = 1 yard
1760 yards = 1 mile
WHY SWITCH?
1 kilometer = 1000 meters1 meter = 1000 millimeters
1 kilogram = 1000 grams1 gram = 1000 milligrams
1 kilosecond = 1000 seconds1 second = 1000 milliseconds
BASE UNITS
mass(kilograms)
length(meters)
temperature(Kelvins)
electric current(amperes)
time(seconds)
DERIVED UNITS
x
x x
=
=
x x=
SI UNIT NAMES
[PREFIX] [BASE]
centi- gram
milli- second
kilo- meter
What it measures
Howmuch
mass
time
length
1/100
1/1000
1000
SI UNITS & SCIENTIFIC NOTATION
3.14 × 1012 meters
3,140,000,000,000 meters
3.14 Tm
SI UNITS & SCIENTIFIC NOTATION
8.12 × 10-9 seconds
0.00000000812 seconds
8.12 ns
SI UNITS & SCIENTIFIC NOTATION
PREFIX SYMBOL SCIENTIFIC NOTATION
SCALE
giga- G E 9 (x 109) 1,000,000,000
mega- M E 6 (x 106) 1,000,000
kilo- k E 3 (x 103) 1,000
hecto- h E 2 (x 102) 100
deka- D E 1 (x 101) 10
base - - 1
deci- d E -1 (x 10-1) 0.1
centi- c E -2 (x 10-2) 0.01
milli- m E -3 (x 10-3) 0.001
micro- μ E -6 (x 10-6) 0.000001
nano- n E -9 (x 10-9) 0.000000001
CONVERTING FROM SI TO SN
Convert 20 mm to m:
• = 20 x 10-3m
Convert 400s to ns:
• = 400 x 109ns
Convert the following:
1. 33 km to m
2. 42.5 Dg to g
3. 38,000,000,000 s to Gs
4. 9.8 x 103 mm to m
5. 303.9 cK to K
GUIDED PRACTICE
1. Be able to write the entire SI Unit Conversion Chart from memory (available on Moodle)
2. Be able to convert to and from Base SI Units
3. Be able to convert from Scientific Notation to SI Units
4. Be able to add, subtract, multiply, and divide in Scientific Notation
(Get with a partner and start studying the SI Unit Conversion Chart)
QUIZ TOMORROW