必修1第四单元.ppt

EarthquakesEarthquakes Unit 4Warming up and reading Yushu EarthquakelEarthquakes are usually caused when rock underground suddenly breaks along a fault. This sudden release of energy causes the seismic waves that make the ground shake. Did you hear about TangshanEarthquake? When did it happen?The Tangshan Earthquake was anatural disaster that occurred onJuly 28, 1976. It is believed to bethe largest earthquake of the 20thcentury by death toll.The number of deaths was around240,000 to 255,000. A further164,000 people were recorded asbeing severely injured. Can you tell me anything about SanFrancisco?Can you imagine what the city ofSan Francisco like after theearthquake?What does the sentence “Its alwaysquiet before a storm” mean?What do you think will happenbefore an earthquake?1) Bright light flashes in the sky.2) The well has deep cracks in it, and the water in it rises and falls.3) Chickens are flying and dogs are barking, and pigs and cows are too nervous to eat.4) Fish jump out of the pond, and mice run wildly out of the fields.Signs before an earthquakeImagine you have time to takeonly one thing before an earthquake, what will you take? Why?Fast reading Read the text and find answers to the following questions.1. When and where were the strange things happening? What were they?2. Why did the text say the world seemed to be at an end?3. How was the city destroyed after the quake?4. When did the second quake hit the city? What was the result of that?5. Who came to help Tangshan first? And how?Read the passage and find out the topic sentence of each paragraph.Paragraph Topic sentence 1234Strange things were happening in thecountryside of northeast Hebei.Everything began to shake. It seemedas if the world was at an end.Everywhere they looked nearlyeverything was destroyed.All hope was not lost. Join the correct parts of the sentences.1. The chickens didnt eat because2. The people didnt worry because3. Such a great number of people died because4. Water was needed because5. The people did not lose hope becauseA. the army came to help them. B. the quake happened while they were sleeping.C. they were nervous. D. dams and wells were useless.E. they didnt know what the strange events meant.Detailed readingHow many parts can this passage be divided into? Three parts Do you know the main idea of each part?Part 1Paragragh1Part 2Paragraph 2、3Part 3Paragraph 4The main idea of each partPart 1.(Para.1)Before the earthquakePart 2.(Para.2,3)During the earthquakePart 3.(Para.4)After the earthquakeSomething strange happened in Tangshan the destroy of the earthquake in Tangshanthe rescue of TangshanTrue or false1. People in Tangshan were warned of the earthquake and didnt go to bed that night.2. People in Beijing also felt the earthquake.3. More than 400,000 people were killed in the quake.4. Many rescue workers and doctors were trapped under the ruins during the aftershock.5. People tried to get fresh water from under the ground.FTFTF Read the text carefully again and choose the best answer.1. What does “them” in the sentence “No wind, however, could blow them away.” (in Paragraph 3) refer to? A. Red autumn leaves. B. Bricks on the ground. C. Bodies of dead animals. D. Sand in the wells.B2. The title “A night the earth didnt sleep” means _. A. the earth was awake all night long B. people on the earth couldnt fall asleep that night C. the earth shook like crazy that night D. animals on the earth would not sleep that nightC3. All the following unusual things happened before the quake except that _. A. the water in the village wells rose and fell B. the chickens and even the pigs were too nervous to eat C. tens of thousands of cows would never give milk again D. fish jumped out of bowls and pondsC4. People in the city went to bed as usual that night because _. A. they didnt think it was strange for water pipes to crack and burst B. they thought it was easy to experience an earthquake C. they thought sleeping was the most important thing whatever would happen D. they could never imagine there would be an earthquakeDSummary of the nation felt the earthquake . A huge crack that was kilometres long and metres wide cut across houses.In terrible seconds a large city lay in ruins. of the people died or were injured during the earthquake. The number of people who were killed or injured reached more than .All of the citys hospitals, of its factories and buildings and of its homes were gone.1/3830152/3400,00075%90%Number each of these things during the Tangshan earthquake. _ Brick buildings were destroyed. _ The walls of the village wells had cracks in them. _ Shelters were put up for those with no homes._ Roads got huge cracks. _ The army helped the survivors.12345Some other big earthquakes in recent yearsThe big earthquake in Pakistan and India in 2005.The big earthquake in Wenchuan, Sichuan Province in 2008.The Haiti Earthquake happened in January2010. The Yushu Earthquake in Qinhai Province in April 2010.seismic belts in the worldWhat shall we do if an earthquakehappens?1. Get under a heavy table or desk and hold on, or sit or stand against an inside wall.2. Keep away from windows. 3. If indoors, stay indoors. 4. If outdoors, stay away from falling debris, trees and power lines. 5. If in a car, stay in the car. 6. Many injuries occur when people act on their impulse to run. DiscussionDiscussionCan we stop earthquakes?We cant stop earthquakes, but we can try to reduce the losses caused by earthquakes.What can we do after earthquakes?To build houses as strong as possible; To build houses on rock rather than on sand.Try to rescue people;Try to rebuild families;Try to forget sad experiences and live with strong belief.Tangshans new lookFrom the reading passage, find the correct word or expression for each of the following meanings.l_ a thin metal piece that carries water l_ a special wall that keeps water l behind it l_ worried or frightenedl _ hurt l_ a deep place to store water to drink l_ a very long water way for boatspipedamshockedinjuredwellcanall_ the part of a building left after l the rest has been damaged l_a lot of l_ finished; dead l_ put something under the earth l_ go up l_ help to get someone out of danger l_ gas that hot water gives out ruinsa great number of at an endburyriserescuesteam1. Look for some earthquake information about Japan. Find out why Japan often has many earthquakes. What measures are taken by the Japanese government to prevent them?2. Review the text and find words or expressions that are difficult for you.Were the world 25 for HaitiA song