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18 Cards in this Set
- Front
- Back
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Define qualitative data
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consist of descriptive terms
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Define quantitative data
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consists of measurements
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What measurement system do all scientists use?
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SI system
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Measurements for mass, length, time, and amt. subst.
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kilogram (kg), meter (m), seconds (s), mole (mol)
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one piece of data is called
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datum
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list the prefixes
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mega-, kilo-, hecto-, deka-, deci-, centi-, milli-, micro-, nan-, pico-, femto-
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Kelvin is an ...
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absolute scale (all molecular motion would stop at 0K)
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Convert K into C
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K+273=C
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Convert C to F
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9/5(C)+32
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Convert F to C
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(F-32)5/9
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Cominations of SI units are called...
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Derived SI units
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the tool to convert measurements is called...
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dimensional analysis or factor-label method
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Inexact numbers are numbers...
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obtained by measurement.
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Define Precision
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Precision refers to how close a series of measurements are to one another.
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Define Accuracy
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Accuracy refers to how closely individual measurements are to a true or accepted value.
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Sigfigs rule for zeros
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between nonzeros = important
at the end and before a decimal point = important |
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Sigfigs rule for multiplying and dividing
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the answer has as many sigfigs as the measurement with the least # of sigfigs
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Sigfig rule for addition and subtraction
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answer has as many digits after the decimal point as the measurement with the fewest number of digits after the decimal point
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