]高一英语Revision of Lesson25 人教版 课件.ppt

单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,Revision of Lesson 25,What did Carl feel in San Francisco at the time of the big earthquake in 1989?,*,First he heard a noise,.,*,Then he felt the floor move.,*,And then he watched all the glasses fall off onto the floor.,Lesson 2627 Earthquakes,Lead-in Questions:,I.,Have you ever heard about an earthquake?What happened in that earthquake?,The most terrible earthquake happened in China is Tang Shans Earthquake in 1976.A great part of the city was destroyed,a large number of buildings were burnt.About 276,000 people died in the earthquake,the fire and the plague,（,瘟疫）,after it.,Pre-reading Questions:,I.,How many people were killed during the earthquake of 1989 in the city of San Francisco?,II.,When the scientists call the earthquake “The Big One”,what do they mean?,Earthquakes(1),1.,At 5:13 on the morning of April 18,th,1906,the city of San Francisco was shaken by a terrible,earthquake,.,A great part of the city was destroyed a large number of buildings were burnt.The number of people who lost homes reached as many as 250,000.About 700 people died in the earthquake and the fire.,2.,Another earthquake shook San Francisco on October 17,th,1989.,It was Americas second strongest earthquake and,about 100 people were killed,.It happened in the evening as people were traveling home.A wide and busy road which was built like a bridge over another road fell onto the one below.Many people were killed in their cars,but a few lucky ones were not hurt.,3.Luckily the 1989 earthquake did not happen in the center of town but about 50 kilometers away.In one part of the town a great many buildings were destroyed.These buildings were over 50 years old,so they were not strong enough.There were a lot of fires all over the city.The electricity was cut off for several days too.,4.,Why do earthquakes happen?Scientists explain that the outside of the earth is made of a number of different plates.At San Francisco the Pacific plate which is moving towards the northwest meets the North American plate.The Pacific plate is moving very slowlyat 5.3 centimeters a year.Sometimes these two plates stop and do not move for years.Then suddenly,they jump and an earthquake is felt.As a result of the movement of these plates,west America near the sea has always been a bad place for earthquakes.When the 1906 earthquake happened,the Pacific plate jumped 5-6 meters to the north.,Key:,One plate moves towards another plate.Sometimes they meet together and jump.Then you will feel an earthquake.,5.We cant stop earthquakes,but we can do things to make sure they do not destroy whole cities.First,its not a good idea to build houses along the lines,where two of the earths plates join together,.Second,if you think there may be an earthquake,its better to build houses on rock not on sand.Third,you must make the houses as strong as possible.Weak buildings will fall down in an earthquake,but strong ones may stay up.,Earthquakes,often happen in the places,6.,Scientists,are afraid that one day an even bigger earthquake will hit the area around San Francisco.,They call it“The Big One”.However,people today are still building more houses.The population in and around San Francisco is now ten times more than it was in 1906.This means that if there is another earthquake,a great many houses and buildings will be destroyed.,1.,In what part of the United States is San Francisco?,2.,In the spring of 1906,what happened to the city of San Francisco?,3.,What happened again in the city in the fall of 1989?,4.,In what other places of the world do earthquakes often happen?,5.,Explain the reason why there are earthquakes.,Key to Q1:,San Francisco is in the northern California,bordering the Pacific Ocean off its west coast.,Turn to page 11,These are some photos of the earthquake in the city of San Francisco in 1906.,Key of the hand-outs,1.The text is about _.,Cthe two strongest earthquakes in the U.S.And the cause of the earthquake,2.After the earthquake in 1906,_ was destroyed.,C.a great part of the city,3.The earthquake in 1989 happened _.,D.in the evening,4.Few people died in 1989 earthquake,because _.,A.It didnt happen in the center of the town.,5.Earthquake are caused by _.,D.the movement of different plates,6.If you do not want to be in an earthquake,which of the following cities would you choose to live in?,A.,Jining,7.The plates are moving _.,B.sometimes,8.What kind of the movement of the plates causes the earthquake?,B.The sudden jump movement.,9.If earthquake often happens in a certain place,where may it be?,C.At the edge of a land plate which is next to an ocean plate.,10.Which is not talked about as the result of earthquakes in the text?,D.Train accident,.,Lesson 27,1.What could we do with the earthquake?We could_.,D.try our best to make it less destructive.,2.What should we try to do about the,earthquake?,C.try to make the building stronger.,3.What kind of place may have less destruction after an earthquake?,C.Cities with strong buildings and a small population.,4.Which city do you think might get the most serious damage after an earthquake?,C.Shanghai,Say Something About the Two Earthquakes in the City of San Francisco,The first earthquake in the spring of 1906,At what time did the earthquake happen?,How many people died in the earthquake?,What happened to the other 250 000 people?,At 5:13 on the morning of April 18th,1906.,About 700 people died in the earthquake and the fire.,They lost their homes.,The second earthquake happened in the autumn of 1989,When did it happen?,How many people were killed?,What happened to a wide and busy road?,What else happened during the earthquake?,Where did the earthquake happen?,In the evening on October 17,th,1989.,About 100 people were killed.,It fell onto the road below.,There were a lot of fires all over the city.The electricity was cut off too.,It happened in the place about 50 kilometers away from the center of the town.,