The effect of light intensity on rate of photosynthesis in pondweed: evaluation
I can evaluate and explain data from an investigation into the effect of light intensity on the rate of photosynthesis in pondweed.
The effect of light intensity on rate of photosynthesis in pondweed: evaluation
I can evaluate and explain data from an investigation into the effect of light intensity on the rate of photosynthesis in pondweed.
Lesson details
Key learning points
- Process data and plot a graph of appropriate results to identify and describe patterns or trends in the results.
- Explaining the results using ideas about the requirement of light for photosynthesis.
- Identifying sources of systematic and random error that could affect the accuracy of the measurements.
- Suggesting improvements (e.g. ways to measure the amount of gas more accurately).
- Evaluating the precision, repeatability and reproducibility of the results.
Common misconception
Pupils often struggle with the difference between repeatability and reproducibility.
The lesson outlines the difference between these two aspects of working scientifically and checks pupils understanding of these in relation to the investigation.
Keywords
Accuracy - a measurement result is considered accurate if it is judged to be close to the true value
Error - an error leads to measurements being different to what they would otherwise be (the true value)
Precision - the spread of results around the mean value
Repeatability - measurements are similar when repeated by the same person or group using the same equipment and method
Reproducibility - similar results are obtained when an investigation is repeated by another person or group using different equipment
Content guidance
- Risk assessment required - equipment
Supervision
Adult supervision required
Licence
This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).
Video
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