Metric Units and Conversions. What Do You See? What About Here?
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Transcript of Metric Units and Conversions. What Do You See? What About Here?
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•Back in medieval times, horses were measured by ‘hands.’•Measure your arm in hands and write down how much you are:_________
•What is the problem when you compare your answerto the rest of the class?
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One township = 36 sections or 23,040 acres where an acre = 160 square poles = 100,000 square gunter links = 43,560 square feet = 10 chains where 1 chain = 22 yards, but the engineer’s chain = 100 feet.
On the other hand, 1 barrel = 42 gallons or 196 pounds or 55 gallons. But 1 gallon = 4 quarts with 2 pints per quart or 4 cups. Unless it’s the Queen Anne wine gallon, the milk gallon, or the imperial gallon.
However we have 62.4 pounds per cubic foot for water. Now then there is the statute mile, the league, the nautical mile, and the marine league.
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SHEESH!!!!How do we fix this
problem?
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Important FactsNumbers in science always have UNITSAny number times 1 = the same numberA standard in measurement is an exact
quantity that everyone agrees to useA conversion factor is a fraction that = 1
Example – 1dozen/12 eggs is a conversion factor
What are some conversion factors that you know?
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Metric MeasurementWhat can be measured? What unit? What equipment?
Length
Mass
Volume
Temperature
Weight
Meters ( m)Grams (g)
Liters ( L)Degrees Celsius
(°C)Newton (N)
Metric RulerBalanc
eGraduated Cylinder
Thermometer Scal
e
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Decimal Move Method
The metric system is based on multiples of 10
To convert from one unit to another you simply move the decimal left or right.
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k h dk U d c mKing Henry’s dirty underwear does contain moldKilo hecto deka UNIT deci
centi milli1000 100 10 1 .1 .01
.001 (Meter, Liter, Gram)
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ExamplesConvert 159 Kilometers (Km) to meters (m)
Locate the decimalIf you don’t see the decimal, it is behind the
number so it is _____________. Stand on the kilo step. Walk to the meter step. You took _____ steps to the ______ so you move
the decimal ____ steps to the ______ Answer:
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ExamplesIf the label on my bottle of vitamin C says that
there are 1250 milligrams (mg) of vitamin C in each tablet, how many grams (g) of vitamin C are in each?
Locate the decimalIf you don’t see the decimal, it is behind the
number so it is _____________. Stand on the milli step. Walk to the grams step. You took _____ steps to the ______ so you move the
decimal ____ steps to the _____ Answer:
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ExamplesI have 0.0075 kL of orange soda. Do I have
enough to give each one of you a glass of soda? Convert 0.0075 kL to L.
Locate the decimalIf you don’t see the decimal, it is behind the
number so it is _____________. Stand on the kilo step. Walk to the liter step. You took _____ steps to the ______ so you move
the decimal ____ steps to the _____
Answer: