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20 Cards in this Set
- Front
- Back
Centimeter (cm)
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a common metric unit of length
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Gram (g)
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a common metric unit of mass
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Milliliter (mL)
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a common metric unit of volume
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Mass
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the quantity of matter in an object; the measure of the amount of matter it posses. Mass is measured with a balance and is not affected by gravity.
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Weight
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the force exerted by gravity on an object
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Measurement
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a numerical value and unit that expresses a physical quantity such as length, mass, or volume
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Instrument
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a device for recording a measurement such length, mass, or volume
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Uncertainty
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the degree of inexactness in an instrumental measurement
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Significant Digits
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the certain digits in a measurement plus one estimated digit
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Non-significant Digits
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the digits in a measurement that exceed the certainty of the instrument
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Rounding Off
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the process of eliminating digits that are not significant
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Exponent
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number written as a superscript that indicates a value is multiplied by itself
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Power of 10
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a positive or negative exponent of 10
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Scientific Notation
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a method for expressing numbers by moving the decimal place after the first significant digit and indicating the number of decimal moves by a power of 10
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Unit Equation
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a statement of two equivalent values; for example,
1 foot = 12 inches |
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Unit Factor
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a ratio of two quantities that are equivalent and can be applied to convert from one unit to another, for example, 1 foot/12 inches
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Reciprocal
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the relationship of a fraction and its inverse; for example, 1 yard/3 feet and 3 feet/1 yard
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Exact Equivalent
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a statement of two exactly equal values, for example, 1 yard = 36 inches
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Unit Analysis Method
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a systematic procedure for solving problems that proceeds from a given value to a related answer by the conversion of units
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Percent (%)
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an expression for the amount of a single quantity compared to an entire sample
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