- Show pupils images of solar panels and help them to identify key features,
eg large surface, black colour, contain water.
- Tell them they are going to use black and silver trays of various sizes,
eg aluminium
'takeaway' containers, containing the water and covered with clingfilm, to see which rises in temperature by the greatest amount over the length of the lesson if left in the sun. Use a microscope bench lamp if there is no sunlight. A datalogger could be connected in order to look at the relative changes in temperatures dynamically. Ask pupils to decide what factors they need to control to make a fair comparison and to predict which of their containers will show the greatest temperature rise, giving their reasons. Discuss their results with them and ask them to think again about the predictions they made and, if appropriate, why they weren't supported by the evidence.
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- give a reason for the prediction made
- evaluate evidence collected, saying whether it supports the prediction
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