AQA CAU key terms Flashcards
Essential key terms
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A measurement that is close to the true value is ?..
accurate
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Results that do not seem to fit the overall pattern or trend.
Anomalies
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Another word for equipment.
Apparatus
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Relationships between categoric variables are shown in ?..
bar charts or pie charts
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This involves marking a scale on a measuring instrument between (at least) 2 known fixed points.
Calibration
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Variable that are described by labels are ??
categoric
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A comparison of the experimental results with the hypothesis.
Conclusion
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Variables that can have any numerical value are ?..
continuous
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These variables must not change during an investigation in order for it to be a fair test.
Control variables
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Any information that has been collected.
Data
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The variable which you measure but don?t control. The outcome variable.
Dependent variable
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All the apparatus that you will use to carry out the experiment.
Equipment
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Data that have been shown to be vaild.
Evidence
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An experiment in which all variables except one (the indepdendent) has been changed.
Fair test
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A proposal put forward to explain facts or observations.
Hypothesis
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This variable is the one that you deliberately change to see what effect it has.
Independent variable
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6 equally spaced measurements over 100 centimetres would mean there is an ?.. of 20 cm between readings.
Interval
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Continuous variables are presented on a ?..
line graph
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The detailed instructions on how to carry out the investigation.
Method
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is related to the smallest scale division on the measuring instrument that you are using.
Precision
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A statement suggesting what will happen, based on a hypothesis.
Prediction
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These cause readings to be different from the true value.
Random errors
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The maximum and minimum values of a variable.
Range
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If the original person uses the same equipment and method to repeat the investigation, and obtains the same results, these results are …
Repeatable
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If another person repeats the investigation using the same or different equipment and obtains the same results, these results are ?
Reproducible
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A line/curve that shows the general relationship between two variables. No points are plotted and the axes are labelled but not scaled
Sketch graph
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If the same error happens every time a measurement is taken it is a ?.. error.
Systematic
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Measurements that are all very close to the mean value are called ?
precise
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This is the value which would be found in an ideal experiment.
True value
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A conclusion supported by valid data from an appropriate experiment.
Valid conclusion
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The difference between a measured value and the true value.
Measurement error
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An error caused when a measuring device reads a value but should be reading nothing.
Zero error
