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IB CHEM
N/A
13
Chemistry
11th Grade
09/09/2012

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Term
Significant Figures
Definition
The digits in the measurement up to and including the first uncertain digit
Term
Random Errors
Definition
An eqaul probability to be too high or too low when an experimenter approximates a reading.
Term
Systematic Errors
Definition
Systematic errors occur as a result of poor experimental design or procedure, but these errors do not decrease by repeating the experiments.
Term
Preise measurements
Definition
have small random errors and reproducible in repeated trials
Term
Accurate measurements
Definition
have small systematic errors and give a result close to the accepted value
Term
Functional Uncertainty
Definition
absolute uncertainty/measured value
Term
percentage uncertainty
Definition
(absolute uncertainty/measured value)x100
Term
percentage error
Definition
[(accepted value - experimental value) / accepte value]x100
Term
Independable Variable
Definition
Variable that does not change, which plotted in the horizontal axis of the graph
Term
Dependable Variable
Definition
Variable that changes which is plotted on the vertical axis and gives an indication of the reliability of the measurement
Term
Extrapolation
Definition
A line that has to be extended beyond the range of masurements on the graph
Term
Interpolation
Definition
The process of assuming that the trend line applies between two points
Term
Volume of a gas
Definition
PV = nRT
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