Errors in experiments can be random or systematic.
Which of the following would produce a systematic error in the student's results?
The light source undergoes small, random fluctuations in voltage during the experiment.
The gas syringe has a scale calibration error, reading 5%5\%5% higher than the true value for all measurements.
The student reads the gas syringe scale from slightly different angles each time.
Different pieces of pondweed have slightly different numbers of leaves.
44 exam-style questions on OCR GCSE Biology Practical skills. Each one has a worked solution and a mark scheme showing where the marks go.