Context: A food company knows that the more water is in a potato chip, the crispier it will be.
Biology CAU
You may also be asked to draw a sketch graph, meaning quite surprisingly, a graph that you sketch. You need to remember to just show a general trend not specific values.
Below is an example of a sketch graph on Google.
Reproducibility
Get someone else to do the experiment to see if they get similar results
OR
Do the experiment yourself again but with a different method.
If you were to do the experiment again what would you do?
Have smaller intervals which would have given more precise results.
Click on the icon to watch a video on osmosis. You may be asked about it in the exam.
This controlled assessment is worth 25% of your final Biology GCSE grade so you need to put the effort it. This page will help you go through some key points for the final 30 mark exam.
Did you need to leave out any readings?
Yes, the 0.8 concentration was an anomaly
Why did you do thins?
We did this because the result does not fit into the general trending pattern.
What examples from your data would you give to support your answer?
The results table and graph.
Why could you not repeat it?
Not enough time
What did you do with your 3 results?
We found the mean (average) which allowed us to identify any anomalies
What range did you use?
0-1M (0.0M, 0.2M, 0.4M, 0.6M, 0.,8M, 1M)
Do you think it was a suitable range?
Yes - It was a suitable range because it gave a variety of results which enabled us to identify a general trending pattern
OR
No - The range could have had higher values for example, went up to 3M. This would have made us more confident to be certain of an anomaly.