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26 Cards in this Set
- Front
- Back
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Accuracy |
How close to a measurement is to the true value. |
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Anomalous/Anomaly |
An anomalous result (anomaly) is a result that does not fit the pattern shown by the other results. |
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Calibration |
Setting the points on a measuring scale correctly by comparing with fixed points like 0 degrees celsius & 100 degrees celsius, so that readings are accurate. |
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Categoric Variable |
A variable that is described by word labels rather than numbers e.g type of insulation. |
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Continuous Variable |
A variable that can take any numerical value including decimal places. |
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Control Variable |
A variable that must be kept the same throughout an experiment to ensure it does not affect the measurements (to ensure a fair test). |
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Dependent Variable |
The variable that is measured to see how it is affected each time the independent variable is changed. |
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Directly Proportional |
The relationship between the variables where if one is doubled the other also doubles. Shown by a straight line which starts at (0,0). |
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Hazard |
Something that can go wrong with an experiment and cause injury to people or objects. |
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Hypothesis |
A suggested idea that can be tested scientifically. |
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Independent Variable |
A variable that is changed by the person doing the experiment. |
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Observation |
A measurement or record made in an experiment. |
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Precision |
Shows the closeness of agreement between measured values from repeated measurements (it is precise if all the repeats cluster closely). |
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Random Error |
Error in the measurement due to something unpredictable happening in the investigation. |
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Uncertainty |
Interval withing which the true value of the measurement will lie- can be expressed as standard deviation. |
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Range |
From the smallest to the largest value of the variable. |
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Repeatable |
When repeated measurements by the same group fo people are closely clustered (precise). |
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Reproducible |
When the same pattern of results is obtained for an experiment by different groups of people/laboratories. |
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Resolution |
The number of divisions of a measuring instrument. |
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Risk |
Something that could go wrong, while doing an investigation, resulting in harm. |
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Systematic Error |
error in the measurement due to a consistent change in the investigation. |
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Theory |
A scientific explanation backed up by evidence. |
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Validity |
A measurement or investigation is valid if it measures what it is supposed to be measuring. |
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Zero Error |
When the meter or measuring device reads something other than zero when it isn't connected. |
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Control |
A version of the investigation set up without any change in variable as a comparison for when the independent variable is changed. |
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Prediction |
A statement of what is expected to happen in an investigation. |
