Transcript It’s all about the UNITS of Measure

It’s all about the UNITS of
Measure
SI UNITS
Or
Metric Units
System International
(International System of Measurement)
• That’s what SI stands for
• It involves measurement based on the
decimal system OR Powers of Tens
• It is very easy to use that’s why we use
it.
• The other system of measurement is
called British Engineering System or BE
British System Units
• Used only in the USA no place else!
• These are units like inches, feet,
pounds, ounces, miles, and degrees
Fahrenheit for temperature.
• It is very hard to convert say inches into
feet yards- miles- etc.
SI UNITS
• You have units for:
- Length ---- METER
- Volume ---- Liter
- Mass ------ Gram
- Temperature uses the Celsius Scale
Degrees Celsius or centigrade
ex. 28ºC
NEXT add special PREFIXES
• You can add many prefixes to the basic
units of the meter, liter and the gram
Using the basic six :
KilodeciHectocentiDekamilli-
For length ( meter )
• Kilo- + Meter makes the kilometer km
• Hecto-+ meter = the Hectometer hm
• Deka- + meter = the Dekameter dam
deci- + meter = the decimeter dm
centi- + meter = the centimeter cm
milli- + meter = the millimeter mm
So you get it right?
• USE the Liter for volume yourself then.
• Now also do the same for mass with
grams.
POWER of TENS enters
•
•
•
•
•
•
KILO- stands for 1000 x or 103
HECTOfor 100 x or 102
DEKAfor 10 x or 10
Decifor 0.1 x or 10-1
Centifor 0.01 x or 10-2
Millifor 0.001 x or 10-3
the one is understood