lesson
Look for a pattern and its limits
1 · Learn
A log records measurements, not automatically their cause. Sample room readings are 18°C at 09:00, 19°C at 09:10 and 21°C at 09:20. The recorded temperature rose by 3°C across those times.
A graph can reveal the pattern, but the record alone does not prove why it rose. Record relevant conditions and avoid inventing events between readings.
2 · Worked example
I describe the observed rise before suggesting possible explanations. I do not state that a heater switched on unless I have evidence for that event.
3 · Your turn
Using the sample log, how much did temperature rise from 09:10 to 09:20? Does the log alone prove the cause?
Check your answer
2°C. No: extra evidence is needed to establish why it changed.
4 · Apply your learning
Enter the supplied data in an approved graphing tool, label axes and write one supported conclusion and one unanswered question.
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