高二英语必修五UNIT1Reading.ppt

There are some great scientific achievements that have changed the world. Can you name some of them? What kind of role do they play in the field of science? Do these achievements have anything in common? Match the inventions with their inventors below before you answer all these questions. Drink only water that you have boiled or treated with chlorine or iodine. Other safe drinks include tea or coffee made with boiled water and carbonated, bottled beverages with no ice. Homework Imagine you are a reporter, and youre interviewing Mr. John Snow. Please make up at least 3 questions to ask him about how he found the evidence to prove his theory. II. Read the text again and tell whether the following statements are true (T) or false (F). 1. Many people died of cholera before its cause was found. ( ) 2. It was a fact that cholera spread in a cloud of gas. ( ) 3. When cholera broke out in 1854, it spread quickly through poor neighbourhoods. ( ) T F T 4. The people who drank beer instead of water did not catch cholera. ( ) 5. The water companies were asked to stop supplying polluted water to people. ( ) T T Match the stages of scientific research with what John Snow did to solve the problem of cholera. 1. Find a problem. 2. Make a question. He noticed two possible theories which explained how cholera spread. He wanted to face the challenge of cholera and find the cause. 3. Think of a method. 4. Collect results. 5. Analyse the results. He found that the water came from a polluted river and cholera was spread by germs. He thought the second idea was correct and decided to prove it. He marked the death places on a map and found out many deaths occurred near the water pump. 6. Find supporting evidence. 7. Draw a conclusion. He found that the family who used piped water from Broad Street died. He announced that polluted water carried the virus. Below is a summary of the text with some words missing