高三課件unit1greatscientists(完整版)
【正文】 and finish the following chart. Para. Stages in an experiment Example in this investigation 1 2 3 4 5 6 7 Find a problem Make up a question Think of a method Collect results Analyse results Repeat if necessary Make a conclusion What causes cholera? Which theory is correct? Collect data on those who were ill or died and where they got their water. Plot information on a map to find out where people died or did not die. Analyse the water to see if that is the cause of the illness. Find other evidence to confirm your conclusion. The water is to blame. The source of all drinking water should be examined so that it is safe. Task 5. Third reading: Ss read again and fill in the chart. Scientific Report by John Snow The problem
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