Planning an Experiment (AQA A-Level Biology): Flashcards
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10 cards from this deck
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Practise the cards
10 cards from this deck
Characteristics of good hypothesis
Characteristics of good hypothesis
Specific, testable, based on biological theory
4 qualities of well-designed experiments
4 qualities of well-designed experiments
Precise, repeatable/reproducible, valid, accurate
Precision in experiments means
Precision in experiments means
Minimal variation around mean value
Independent variable
Independent variable
Factor deliberately changed in experiment
Dependent variable
Dependent variable
What you measure to assess effect of independent variable
Purpose of control variables
Purpose of control variables
Ensure only independent variable affects dependent variable
Minimum repetitions per condition
Minimum repetitions per condition
At least three times
Purpose of negative controls
Purpose of negative controls
Test conditions where no effect expected
Handling anomalous results
Handling anomalous results
Investigate causes; don't ignore just because they contradict your hypothesis
Independent variable position in data table
Independent variable position in data table
Left-hand column