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### 18 Cards in this Set

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