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12 Cards in this Set
- Front
- Back
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SI
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International System of Units. The measurement system used by most scientists. Everything is based on the number 10. Basic units are multiplied or divided by powers of ten to arrive at bigger or smaller units.
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Kelvin Scale
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The SI scale for measuring temperature. Some scientists use the Celsius scale instead. If you live in the U.S., you are probably more familiar with the Fahrenheit scale.
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Accuracy
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How close a measurement is to the true value.
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Precision
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How exact a measurement is. A measurement of 65.5 mL is more precise than a measurement of 66 mL.
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Calculating Derived Quantities
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Quantities that are calculated from two or more different measurements. Examples include area and volume.
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Significant Figures
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The correct number of digits.
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Scientific Notation
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A way of writing very large or small numbers that uses exponents.
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Descriptive Statistics
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Sums up a set of date in a single number. Examples include the mean and range.
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Mean
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The average value. It is calculated by summing the individual measurements and dividing the total by the number of measurements.
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Range
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The total spread of values. It gives you an idea of the variation in the measurements. It is calculated by subtracting the smallest value from the largest value.
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Graphs
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Helps you visualize a set of data. Three commonly used types are bar, circle, and line.
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Model
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A representation of an object, system, or process. For example, a road map is a representation of an actual system of roads on the ground.
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