How close something is to the true value, but not precise.
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Random errors
Caused by things we can't control. For example tiny temperature changes in a room.
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Precision
How small a measurement is.
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Systematic errors
Errors caused by inaccurate equipment.
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Reliability
If someone repeats your measurements using their own equipment and the results are the same then your results are reliable.
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Comparisons
Comparing your own result to another's to see if they are similar. If the patterns are the same then your results are reproducible.
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Independant variable
Something you change to see what happens.
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Dependant variable
Something that changes that you measure.
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Fair test
A test in which only the independant variable is allowed to affect the dependant variable.
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Validity
Your results are valid if you have carried out a fair test.
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Control group
Sometimes in experiments results are compared to a control group. For example plants with fertiliser and compared to a control group of plants without fertiliser, to see the affect of the fertiliser.
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Continuous variable
Results with any numerical value.
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Categoric variable
Labels for categories. For example: Red, Brown, Black and Blonde.
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Discrete variable
Results that can only be whole numbers.
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Preliminary investigation
An experiment you do before the real one, to see if you have the right method.
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Sources
Information about the context of the experiment that is reliable and trustworthy.
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Context
The experiment in real life and how it can affect real life.
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Other cards in this set
Card 2
Front
Caused by things we can't control. For example tiny temperature changes in a room.
Back
Random errors
Card 3
Front
How small a measurement is.
Back
Card 4
Front
Errors caused by inaccurate equipment.
Back
Card 5
Front
If someone repeats your measurements using their own equipment and the results are the same then your results are reliable.
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