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Agenda Bell Work
• Pick up Metric WS from front desk and complete
• What are the base units for the metric system?
• What tools do we use to make these measurements?
• Notes: Metric Conversions
• Modern Marvels Measurement
HW: Outline Appendix APg’s 738-741
Metric ConversionsMetric ConversionsFebruary 7, 2013February 7, 2013
ObjectivesObjectives1.1. Draw the metric staircaseDraw the metric staircase
2.2. Understand powers of 10Understand powers of 10
3.3. Practice Metric ConversionsPractice Metric Conversions
Metric SystemMetric System based on a base unit that corresponds based on a base unit that corresponds
to a certain kind of measurementto a certain kind of measurement Length = meterLength = meter Volume = literVolume = liter Weight (Mass) = gramWeight (Mass) = gram
Prefixes plus base units make up the Prefixes plus base units make up the metric system metric system – Example:Example:
Centi + meter = CentimeterCenti + meter = Centimeter Kilo + liter = KiloliterKilo + liter = Kiloliter
Metric SystemMetric System These prefixes are based on the power of 10These prefixes are based on the power of 10
From each prefix every “step” is either From each prefix every “step” is either – 10 times bigger10 times bigger or or -- 10 times smaller-- 10 times smaller
KKids ids HHate ate DDoing oing MMath ath DDuring uring CChristmas hristmas MMorningorning
KKiloilo HHectectoo
DDekaekaLiterLiterMMeteete
rrGramGram
DDecieci CCentienti MMilliilli
For ExampleFor Example Centimeters are 10 times bigger than Centimeters are 10 times bigger than
millimetersmillimeters
Therefore it takes MORE millimeters to Therefore it takes MORE millimeters to make the same lengthmake the same length
1 Centimeter = 10 millimeters1 Centimeter = 10 millimeters
KiloKilo HectoHecto DekaDekaLiterLiter
MeterMeterGramGram
DeciDeci CentiCenti MilliMilli
KILO1000Units
HECTO100
UnitsDEKA
10Units
DECI0.1
UnitCENTI
0.01Unit
MILLI0.001Unit
MetersLitersGrams
Ladder Method
How do you use the “ladder” method? 1st – Determine your starting point.
2nd – Count the “jumps” to your ending point.
3rd – Move the decimal the same number of jumps in the same direction.
4 km = _________ m
12
3
How many jumps does it take?
Starting Point Ending Point
4.1
__.2
__.3
__. = 4000 m
Metric StaircaseMetric Staircase Move the decimal place one place for each Move the decimal place one place for each
“step”“step”
11.. meter meter = 10= 10.. Decimeters Decimeters = 100= 100.. Centimeters Centimeters
KiloKilo HectoHecto DekaDekaLiterLiter
MeterMeterGramGram
DeciDeci CentiCenti MilliMilli
Now try Meters to KilometersNow try Meters to Kilometers(Remember it’s to the left now)(Remember it’s to the left now)
1 Meter 1 Meter = = ..1 Dekameters 1 Dekameters = = ..01 Hectometers 01 Hectometers
= = ..001 001
KiloMetersKiloMeters
KiloKilo HectoHecto DekaDekaLiterLiter
MeterMeterGramGram
DeciDeci CentiCenti MilliMilli
RememberRemember For every move to the For every move to the rightright you move you move
the decimal to the the decimal to the rightright
For every move to the For every move to the leftleft you move the you move the decimal to the decimal to the leftleft
KiloKilo HectoHecto DekaDekaLiterLiter
MeterMeterGramGram
DeciDeci CentiCenti MilliMilli
Try these conversions using the ladder method.
10 mg = _______ g 0.1 L = _______ mL 1.60 cm = _______ mm
1.4 km = _______ m 10.9 g = _______ kg 2500 m = _______ km
Conversion Practice
Compare using <, >, or =.
5.6 cm 60 m 70 g 69.8 mg
More PracticeMore Practice3.68 kg = ____________ g3.68 kg = ____________ g
568 cm = ____________m568 cm = ____________m
8700 mL = ___________L8700 mL = ___________L
25 mg = ____________g25 mg = ____________g
More PracticeMore Practice 0.101cm = _____________mm0.101cm = _____________mm
250mL = _____________L250mL = _____________L
600 g = _____________kg600 g = _____________kg
8900mm = _____________m8900mm = _____________m
More PracticeMore Practice 0.000004 m = ____________mm0.000004 m = ____________mm
0.250 kg = _____________mg0.250 kg = _____________mg
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