人教课标版高中英语必修一Uint 4 Earthquakes Period 1 课件.ppt

,unit 4 Earthquakes,Period 1 Warming up and Pre-reading,Disasters What kind of disasters do you know?,flood,Drought (干旱）,Forest fire,Hurricanes（飓风）,Earthquake,Do you know why an earthquake happens?,San Francisco,Pacific plate,American plate,Eurasian plate,Indian plate,African plate,Antarctic plate,Paragraph 4,Pacific plate,North,South,West,East,American plate,Earthquake Happens,Listening,Page 62,Read the statements and then listen to the whole text. Decide whether the statements are true or false. Give your reasons.,Part 1,Part 2,1,It is believed that on the surface of the earth are a number of plates. The plates are always moving. If the plates stop moving, there is an earthquake. If the plates move, there is an earthquake. Wherever you live, you are in an earthquake area. China has two plates pushing on her and they make mountains and earthquakes.,T,T,T,F,F,F,Listen to the text and answer these questions.,Why do earthquakes happen? Why do California, China and Japan have a lot of earthquakes?,1,Earthquakes happen when two moving plates jump and push against each other.,2,California, Japan and China have a lot of earthquakes because they are placed in areas where different plates meet.,Part 1:,2,Part 2:,Do not build houses along a line where two plates meet. Make sure you build houses on rock rather than on sand. You must make the houses as strong as possible . Weak buildings will fall down and strong ones may stay up.,Unit 4 Listening Part 1,Why do earthquakes happen? Scientists believe that the surface of the earth is covered by a number of moving plates. Sometimes two plates move towards and push against each other. Sometimes they stop for years but at other times they jump and an earthquake is felt. Because of the movements of these plates, California, China and Japan have a lot of earthquakes. You can see the result in San Francisco where the Pacific plate meets the North American plate. When the 1906 earthquake happened, the Pacific plate jumped 5 to 6 meters to the north.,Part 2,China is a country where many earthquakes happen. The Pacific plate is pushing China from the east and the Indian plate is pushing China from the southwest. The power of this movement created the Himalayas and Mount Qomolongma. It now causes earthquake in China. We cannot stop earthquakes but we can do things to make sure they do not destroy whole cities. First it is not a good idea to build houses along the line where two plates meet. Second, if you think there may be an earthquake, make sure to build houses on rock rather than 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.,class discussion,请同学们把课本翻到25页，认真看一下Tangshan和San Francisco这两座城市，想象一下如果这两座城市发生过地震，会发生哪些变化。,Play,lets watch a short vedio,Imagine your home begins to shake and you must leave it right away. You have time to take only one thing. What will you take? Why?,I want to take money, books, food, water, clothes,Because ,Pre-reading,短语学习： 1.right away 立刻，马上 (可用于过去或将来时态 ） e.g.You dont look well. Youd better go and you see a doctor right away. e.g. He didnt answer right away. 2.right now 现在，立刻，马上 (一般用于现在或者将来时态 ) e.g. If you set off right nowat once, you will be able to meet him.,water,money,identity card,food,books,clothes,computer,map,pictures of family,mobile phone,radio,What will you take? Why?,What do you think may happen before an earthquake?,What do you think may happen before an earthquake?,1,The water in the wells rose and fell . 2,And some deep cracks could be seen in the well walls. 3,A smelly gas came out of the cracks.,What do you think may happen before an earthquake?,1,Mice ran out of the fields looking for places to hide. 2,Fish jumped out of bows and ponds.,What do you think may happen before an earthquake?,1, The chickens and even pigs were too nervous to eat. 2, The dog was barking loudly again and again.,What do you think may happen before an earthquake?,The chickens and