Great scientists Unit 1 Reading John Snow Defeats “King Cholera” 执教者：嵊州市黄泽中学 吴义福

incurable(hard to cure) fatal How? the severest John Snow Defeats “King Cholera” King Cause expert n./adj. doctor physician deadly incurable(hard to cure) fatal

Causes: Two theories (ways of spreading) First: Multiply in the air Second: Absorb with the meals Which one is more believable? (Find out some verbs) Suspect the correction Need evidence Find out why/evidence Begin his enquiry Gather information

How to collect evidence? First: He _______________ the exact places where all the dead people had lived. It gave him ______________________________. marked on a map a valuable clue about the cause

Broad Street Public house Many deaths happened here. No death happened here. Conclusion: It seemed that the water from the pump was to blame.

Next: What happened to the pump water? The astonishing fact: The water came from the polluted river. The astonished people’s action: Remove the handle and stop using the water. The astonishing result: The disease slowed down. Conclusion: He had shown that cholera was spread by germs, not in a cloud of gas.

Then: What extra evidence did he find? two other deaths A woman and her daughter who lived far away but drank the water also died. draw a conclusion (announce) with certainty The polluted water carried the disease.

Last: How to prevent the disease from happening again? Examine the source of all the water supplies. 2.Not to expose people to polluted water. Finally “King Cholera” was defeated.

Great scientists, Good qualities. What and why?

Develop your thinking ability: passive----active Creative thinking: negative----positive impossible----possible find a problem Logical thinking: analyze the problem solve the problem specific situation Specific thinking: scientific method satisfactory result

Think and Talk: Find, analyse and solve a specific problem in your study or your life.

Homework 1.Find, analyse and solve a specific problem in your life or your study. 2. Try to retell the passage according to the structure on Bb.