A value is not a change
A value is not a change
Two 100 g samples in a 24°C room, matching cups/lids, method and 15-minute exposure. Their starts differ.
Different starting temperatures
Constructed teaching data: these values were invented for this activity, not collected in an experiment.
Sample | Start (°C) | After 15 min (°C) |
|---|---|---|
U | 14 | 19 |
V | 18 | 21 |
1. Which has the warmer final value? Which warmed more? Explain why the larger final value need not mean a larger increase.
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2. Does this comparison isolate a protector effect? Explain using the starting conditions.
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Fresh check
Fresh equal 100 g samples starting together in a 22°C room; cups, lids, method and 15-minute interval match. Paper task.
New cooling readings
Constructed teaching data: these values were invented for this activity, not collected in an experiment.
Sample | Start (°C) | After 15 min (°C) |
|---|---|---|
C | 32 | 29 |
D | 32 | 27 |
3. Find each fall. Which better limits cooling in this record? Use change as well as the endpoint.
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