Generating Questions
from Data: Evaporation
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What does the up /down axis show?
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What does the across axis show?
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Which graph is which?
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What’s happening to the temp?
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Do you know what ethanol is?
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What sort of things have/contain alcohol?
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What sort of things have/contain acetone?
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Do you know what acetone is?
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Calculate the temp loss in each case.
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What is the slope of each line?
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What are the variables involved in this?
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Was this a fair test?
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How would you make this a fairer test?
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Do you think it would make a difference?
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Do you think we would get the same results
if we did it again?
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What do you think could cause the
temperature to go down?
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Can you suggest why the blue line
drops most?
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Do you need any more information?
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Which evaporated the fastest? Slowest?
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What happens next?
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Would the same thing happen again?
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Does the start temp make any difference?
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Which drops fastest - why?
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If the BP of water is 1000C what’s the
story here?
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What happens when liquids evaporate?
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Why do liquids evaporate?
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Do all liquids evaporate at the same temp,
over the same length of time?
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Where do liquids get the heat to evaporate?
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Why are these graph going down instead
of up?
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What temp is being measured?
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If the recording went on would they all
reach the same temp?
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Why are the starting temps different?
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Which liquid reached the lowest temp?
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Which temp went down the most?
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Why is the temp going down?
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Is the temp going down or up?
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What was the lowest temp reached?
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What was the temp of each after 40 secs?
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What do the lines mean?
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Would the graph be the same if they had all
started at 100C?
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Were they all at the same temp at any stage?
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Why did the lines cross over?
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Why did they all finish at the same point?
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How long did this exp last?
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Did evaporation take place?
How would you know?
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What are we measuring here?
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Why is the acetone lower?
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Was there heat loss?
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What is happening to the temp?
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Do the colours on the lines have any
significance?
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Where do you find ethanol and acetone?
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What was the temp difference at the start
and at the end?
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Is this graph reproducible?
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Which goes down the fastest?