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Just as there are many spoken languages, there are many ways of expressing the same quantities in science. All scientists throughout the world measure length using centimeters, meters, and kilometers rather than inches, feet, and miles. Even within this single system of measurement, it is still necessary to reinterpret, or convert, quantities. For example, it is more efficient to express 1,000 meters as 1 kilometer, or to express 150 centimeters as 1.5 meters.
The principal lesson objectives are:
• Perform unit conversions.
• Properly use scientific notation.