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Units and Standards

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In science, numbers arent just numbers. They need a unit. We use standards for this unit. A standard is: a basis for comparison a reference point against which other things can be evaluated Ex. Meter, second, degree

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Units and Standards The unit of a #, tells us what standard to use. Two most common system: English system Metric system The science world agreed to use the International System (SI) Based upon the metric system.

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Units and Standards

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Conversions in the SI are easy because everything is based on powers of 10

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Units and Standards Ex. Length. Base unit is meter.

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There are 4 main reasons why the metric system is used around the world. No fractions Easy conversions – NO MATH! Based on factors of 10 The same prefixes.

There are 4 main reasons why the metric system is used around the world. No fractions Easy conversions – NO MATH! Based on factors of 10 The same prefixes.

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