As part of our learning about the water cycle, we made our own water catchment area to investigate what happens to water run-off following precipitation. We also investigated how pollutants enter the water cycle. Children arranged bottles and cartons under plastic bags to create areas of high ground. When it 'rained' they looked at where the water went and if rivers or lakes were formed anywhere. We added pollutants in the form of powdered paint, and were shocked to see how easy it was for the pollutants to enter the water cycle.
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