人教版必修五Unit1Greatscientistreading1课件(29张)(优选.)

Scanning
Reading Comprehension VI
Answer these questions.
1 John Snow believed Idea 2 was right. How did he finally prove it?
John Snow finally proved his idea because he found an outbreak that was clearly related to cholera, collected information and was able to tie cases outside the area to the polluted water.
Eat only food that's been thoroughly cooked and is still hot, or fruit that you've peeled yourself.
Avoid undercooked or raw fish and shellfish. Avoid raw salads and vegetables. Avoid food and drinks from street vendors.
Discuss the question in groups.
Group Work
Discussion
What should you do if you're travelling to a country that has a cholera outbreak?
Drink only water that you have boiled. Other safe drinks include tea or coffee made with boiled water, bottled beverages with no ice.
Before we make a conclusion, it is necessary for us to find supporting evidence.
Skimming
Reading Comprehension II
What’s the main idea of the passage? A. John Snow was a well-known doctor
certain information
Scan the text for key words and phrases, dates, etc.
Do not need to read the whole text.
Skimming for general idea
Skimming
Reading Comprehension I
___ John Snow investigated two streets where the outbreak was very severe.
___ King Cholera was defeated. ___ He found that most of the deaths were
near a water pump. ___ He had the handle removed from the
He got interested in two theories. He needed to prove the second theory was correct.
He found out that dirty water was the cause of cholera.
Cholera was spread by germs and not in a cloud of gas.
___ John Snow began to test two theories. ___ An outbreak of cholera hit London in
1854. ___ John Snow marked the deaths on a
map.
___ He announced that the water carried the disease.
3. To know more about John Snow and his achievements.
4. To learn some useful words and expressions in the passage.
a general idea
titles and headings the first and last sentences of paragraphs the first and last paragraphs pictures and charts
2 Do you think John Snow would have solved this problem without the map? Give a reason.
No. The map helped John Snow organize his ideas. He was able to identify those households that had had many deaths and check their water-drinking habits. He identified those houses that had had no deaths and surveyed their drinking habits. The evidence clearly pointed to the polluted water being the cause.
Summary
First we should find the problem. Then, think of a method. We should collect as much information as possible.
Analyzing results is the most important stage.
3 Cholera was a 19th century disease. What disease do you think is similar to cholera today? Why?
Three diseases, which are similar today, are SARS, AIDS and bird flu, because they are serious, have an unknown cause and need public health care to solve them.
Polluted water carried the virus. Finally “King Cholera” was defeated.
Scanning for specific
information
Scanning
• Read the passagReeadainng Cdomnpruehmensbioen rIV these • events in the order that they happened.
Para. 1 2 3 4 5 6 7
Paragraphs & Stages
Stages in an experiment
Find a problem Make a question Think of a method Collect results Analyse the results Find supporting evidence Draw a conclusion
Retell the text by filling in the following blanks.
John Snow was a well-known ______ in London in the ____ cendtuorcyt.oHre wanted to find the ______ of cholera in order to ______ it. In 1854 when a cholera ______ out, he began to gather information.1H9eth_______ on a map where all the dead people had lived and he found that many
2. How many people died in 10 days in two particular streets? A. Less than 500. B. More than 500. C. More than 450. D. Less than 450.
3. What attitude did John Snow take to the two supposed theories explaining how cholera attacked people? A. Doubtful but he could do nothing about it. B. Objective and he asked his assistants to gather information. C. Acceptable and he was sure about the causes. D. Reasonable but they remained to be proved scientifically.
Unit 1
Great scientists
Reading
JOHN SNOW DEFEATS “KING CHOLERA”
Objectives
1. To summarize and remember the main idea of the passage.
2. To speak out the detailed information of the passage.