Units to nanograms



Keywords: units, scientific notation, and significant figures, units,, scene summary, scene summaries, chapter summary, chapter summaries, short summary, criticism, literary criticism, review, scene synopsis, interpretation, teaching, lesson plan
Description: A summary of Units in 's Units, Scientific Notation, and Significant Figures. Learn exactly what happened in this chapter, scene, or section of Units, Scientific Notation, and Significant Figures and what it means. Perfect for acing essays, tests, and quizzes, as well as for writing lesson plans.

When trying to describe the quantity or quality of something, whether a chemical substance or physical phenomenon, it is helpful to have some standard measure to refer to. A unit is nothing more than a standard by which a measured value can be described. For instance, in the old English system, a foot was just that--the length of a man's foot. This was helpful in that when a distance between, say, a house and a water well was described in feet, one who had never seen the dwelling in question would have an instant idea of how far away the well was, based solely on a verbal description. The concept today hasn't changed, although our standards make better scientific sense and are more exact.

There are two different sets of units used in scientific measurements: British Engineering units and the metric system (also called the Standard International (SI) system). Both are based on standards, though those underlying the British system can be shockingly inscrutable. The metric system is based on a far less arbitrary system of tens, and is far more rational, intelligent, and easier to use. In general, people tend to stick with the system with which they are most familiar, and have the most intuitive feeling for. The United States uses the British system; most of the rest of the world (including Britain) uses the metric system. In terms of science, the metric system is almost always used. For Americans, it is therefore often necessary to make conversions between the two. Conversion tables reside in the "Reference" pull-down menu at the top of most SparkNotes pages.




Photogallery Units to nanograms:


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