Metric Conversions Ladder Method

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• Metric Conversions Ladder Method

T. Trimpe 2008 http//sciencespot.net/
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1. Why Metric

1. Metric is easy because its based on POWERS OF
   10!
2. Our system (the English system) is all over the
   place
3. All scientists use metric

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2. What do I need to know?

• Our base units
• Mass (gram g)
• Length (meter m)
• Volume (liter L)

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UNITS OF MEASURE

• What metric unit measures
• length?
• Meter
• volume?
• Liter
• mass/weight?
• Gram
• Volume of a solid
• cm3

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• Our BIGGER prefixes
• Kilo (k) 1000 x base
• Hecto (h) 100 x base
• Deca (da) 10 x base

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• Our SMALLER prefixes
• Deci (d)1/10 x base
• Centi (c) 1/100 x base
• Milli (m) 1/1000 x base

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Abbreviations

• Kilometers-km.
• Hectometers hm.
• Dekameters- dam.
• Decimeters- dm.
• Centimeters- cm.
• Millimeters- mm.

• Kiloliters-kL.
• Hectoliters hL.
• Dekaliters- daL.
• Decileters- dL.
• Centiliters- cL.
• Milliliters- mL.

Kilograms-kg. Hectograms hg. Dekagrams-
dg. Decigrams- dg. Centigrams- cg. Milligrams-
mg.
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3. How do I remember this?

• KING
• HENRY
• DIED
• BY
• DRINKING
• CHOCOLATE
• MILK

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Conversion Practice
Try these conversions using the ladder method.
1000 mg _______ g 1 L _______ mL 160 cm
_______ mm 14 km _______ m 109 g _______ kg
250 m _______ km
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Metric Conversion Challenge
Write the correct abbreviation for each metric
unit. 1) Kilogram _____ 4) Milliliter _____
7) Kilometer _____ 2) Meter _____ 5)
Millimeter _____ 8) Centimeter _____ 3) Gram
_____ 6) Liter _____ 9) Milligram _____ Try
these conversions, using the ladder method. 10)
2000 mg _______ g 15) 5 L _______ mL 20) 16
cm _______ mm 11) 104 km _______ m 16) 198
g _______ kg 21) 2500 m _______ km 12) 480
cm _____ m 17) 75 mL _____ L 22) 65 g
_____ mg 13) 5.6 kg _____ g 18) 50 cm _____
m 23) 6.3 cm _____ mm 14) 8 mm _____ cm
19) 5.6 m _____ cm 24) 120 mg _____ g
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Check your answers!

• Try these conversions, using the ladder method.
• 1. 2 g
• 2. 104000 m
• 3. 4.8 m
• 4. 5600 g
• 5. .8 cm
• 6. 5000 ml
• 7. 0.198 kg
• 8. 0.075 l
• 9. 0.5 m
• 10. 560 cm
• 11. 160 mm
• 12. 2.5 km
• 13. 65000 mg
• 14. 63 mm
• 15. 0.12 g

• Conversion Challenge
• Abbreviations
• 1. kg
• 2. m
• 3. g
• 4. mL
• 5. mm
• 6. L
• 7. km
• 8. cm
• 9. Mg

16. lt 17. gt 18. 19. 20. lt 21. gt
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Scientific Notation

• A way to express very small or very large numbers
• Example
• 12345 1.2345 x 104
• 0.00456 4.56 x 10-3

____________ the of times the decimal was
moved () to the left (-) to the right
_________
__________ must be between 1 and 9
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Scientific Notation

• 56934
• 1280
• 0.0345
• 0.0000037

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Scientific Notation

• 2.347 x 10-3
• 8.98736 x 104
• 3.48763 x 10-4
• 5.7654 x 105

Reverse it! () right (-) left
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BELL WORK

• With your partner, come up with 5 examples of
  metrics in everyday life.
• Compile the list in the Notes section of your
  binder.
• Be prepared to share with the class

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Some Examples of Metrics