Chapter 2 - numbers in scientific notation Units • Are...

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Chapter 2 15:08 Measurement Allows us to distinguish between small differences existing within larger  classifications, differences which might otherwise go unnoticed Uncertainty Scientists report measured quantities in a way that reflects the uncertainty  associated with the measuring device used  Last digit is estimated Significant Figures Scientific numbers associated with measurements are reported such that  MEANING is attached…with respect to the instrument used to collect the  measurement o Uncertainty is not implied but made EXPLICIT Rules for Reporting Subject to change Discipline specific Scientific Notation Offers a solution for writing very large and very small numbers Numbers written in scientific notation have two parts o The decimal part o The exponential part Make sure you know how to use your own calculator to enter and manipulate 
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Unformatted text preview: numbers in scientific notation Units • Are fixed, agreed-upon quantities to which other quantities are compared • A number in association with a unit is a representation of a measurement International System of Units (SI Units) • To minimize confusion, scientists around the globe agree to use this system • Based on the metric system (10) • Length- meter (m) • Mass- g, mg, kg o kg is the base • Time- seconds (s) • Know the prefix multipliers Derived SI Units • A simple example is volume Unit Conversions • Some unit conversions are intuitive o 30 minutes vs. half an hour • the algebraic expression of unit conversions requires conversion factors o can be constructed from any two quantities known to be equal 15:08 15:08...
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This note was uploaded on 11/14/2010 for the course BIO 1105 at Virginia Tech.

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Chapter 2 - numbers in scientific notation Units • Are...

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