Handling Data (AQA A-Level Biology): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
Why should you estimate results before performing calculations in biology?
Why should you estimate results before performing calculations in biology?
To identify obvious errors
What does estimation involve in biological measurements?
What does estimation involve in biological measurements?
An educated guess based on knowledge
What is a benefit of practising estimation during practical work?
What is a benefit of practising estimation during practical work?
Develops confidence with realistic ranges
What causes uncertainty in measurements?
What causes uncertainty in measurements?
Instrument limits & human error
What does the uncertainty of measurement represent?
What does the uncertainty of measurement represent?
The maximum likely error
What is the typical uncertainty of a standard mm ruler when measured carefully?
What is the typical uncertainty of a standard mm ruler when measured carefully?
±0.5 mm
What is the formula for calculating percentage error?
What is the formula for calculating percentage error?
What is the percentage error for a 6 mm object measured with a ±0.5 mm uncertainty ruler?
What is the percentage error for a 6 mm object measured with a ±0.5 mm uncertainty ruler?
8.3%
What is the percentage error for an 87 mm object measured with a ±0.5 mm uncertainty ruler?
What is the percentage error for an 87 mm object measured with a ±0.5 mm uncertainty ruler?
0.6%
Why do larger objects have smaller percentage errors?
Why do larger objects have smaller percentage errors?
Fixed error is smaller proportion