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Metric System and Conversions
8th Grade Science
Why the Metric System?
In science class, we will be using the Metric System. The metric system is a system of measurement that is used by scientists all over the world.
The metric system is simpler and easier to use and understand than traditional measurement systems
Most countries only use the metric system. In the United States, we use the English or Standard
measurement System.
Metric/S.I. Units
Depending on what we are measuring, we will use different units• Length: meter (m)
• Mass: gram (g)
• Temperature: Celsius (°C) or Kelvin (K)
• Time: second (s)
• Volume: cubic meter (m3) for solids or liter (L) for liquids
• These are all called base units
Data can be recorded quantitatively (numbers) or qualitatively (descriptions/observations)
Prefixes Denote (tells you) where the decimal is placed When you add a prefix, it changes the value of
the number• Kilo (K) = 1000
• Hecta (H) = 100
• Deca (D) = 10
• Deci (d) = 0.1 (1/10)
• Centi (c) = 0.01 (1/100)
• Milli (m) = 0.001 (1/1000)
Converting Between Metric Units
Use the conversion staircase For each step moved up, move the
decimal point the same number to the left
For each step moved down, move the decimal point the same number to the right
Metric to Metric Conversion Practice
3 m
0.3 dkm
0.03 hm
0.003 km
Convert 3 meters to kilometers
Metric to Metric Conversion Practice
5 m
50 dm
500 cm
5000 mm
Convert 5 meters to millimeters
Independent Practice
Convert 5 meters to centimeters Convert 0.92454 milligrams to grams Convert 1,000 liters to deciliters Convert 30 kilograms to grams
English (Customary) to Metric Units
Use conversion sheet
Independent Practice
Convert 5 inches to centimeters Convert 0.92454 yards to meters Convert 1,000 pounds to kilograms Convert 30 gallons to liters
Works Cited PowerPoint Presentation modified with permission from
Baker, G. (2013, June 13). Metric Mania [PowerPointslides].
Retrieved from
http://www.thesciencequeen.net/Metric%20Mania1.pdf
Images
Camelbak. (2013). Bottles. Retrieved from http://shop.camelbak.com/bottles/l/200
iRuler. (2013, September 26). Online ruler. Retrieved from iruler.net
Paine, Crystal. (2010, January 18). Free Gallon of milk with $100 grocery purchase. Retrieved from
http://moneysavingmom.com/2010/01/free-gallon-of-milk-with-100-grocery-purchase.html
Wood, Monika. (2011, November 23). Meter Stick-Yard Stick_1A10.35. Retrieved from
https://sharepoint.umich.edu/lsa/physics/demolab/Main%20Photo%20Library/
Meter%20Stick%20-%20Yard%20Stick_1A10.35.JPG
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