All measurements in Science come in 2 parts, in number and unit. The unit combinations and the numbers are called quantities. The SI (Systeme Internatinale) is used to show the conversions by using powers of 10.
SI Base Units
SI Unit Conversions
Conversions
Example:
Convert 2 metres to centimeters?
Conversion Exercise
1) Convert 1 kilogram to grams
2) Convert 2.5kg to grams
3) Convert 5 milligrams to grams
4) Convert 25 µg to kilograms
For more practice on the prefixes: try this quiz!
http://chemistry.about.com/od/testsquizzes/l/blmetricunitquiz.htm
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