book1unit4warmingup.ppt

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1、fireNatural Disastersfloodtyphoonsnow slide(雪崩雪崩)volcano(火山火山)mudflowsandstormTsunami(海啸）海啸）earthquakeHow much do you know about an earthquake?Many people diedPeople lost their homes Many things were destroyed.大家一起来欣赏一首为汶川地震创作的歌曲直到永远青海省玉树县2010年4月14日发生两次地震，最高震级7.1级Many people believe that“it is alway

2、s calm before a storm,”look carefully at the two photos.Now,imagine there has been a big earthquake.Describe what might happen to the objects in the photos.TangshanTangshan,HebeiJuly 28th,1976San Francisco1906年年,旧金山旧金山地震后街景地震后街景1906年年,地震后旧金山市地震后旧金山市区被扭曲的电车轨道区被扭曲的电车轨道 Tall buildings were destroyed.Ro

3、ads were cracked.People were injured.The city was in ruins.Do you know why an earthquake happens?Pacific plateAmerican plateEurasian plate Indian plateAfrican plateAntarctic plateSan FranciscoParagraph 4Pacific plate NorthSouthWestEastAmerican plateEarthquake HappensWhy do earthquakes happen?Scienti

4、sts 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 slowly at 5.3 centimeters a year.nSometimes these two plates stop and do not move

5、 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 metres to the north.Imagine your home begins to shake and you

6、must leave it right away.You have time to take only one thing.What will you take?Pre-readingpersonal washing thingsa bottle of water moneytorchmobile phonefood and sweets blanketmedicineYou will take:2.What strange things would happen before an earthquake?Bright lights flash in the skyBright lights

7、flash in the skyAnimals are too nervous to sleep,such as cats,dogs,chickens,horses,ducks and rabbits,etc.What do you think may happen before an earthquake?The water in the wells_and _.And some deep _could be seen in the well walls.A _gas came out the cracks.rosefellcrackssmellyWhat do you think may

8、happen before an earthquake?Mice ran out of the fields_places to hide.Fish _out of bows and ponds.looking forjumpedWhat do you think may happen before an earthquake?The chickens and even pigs were _nervous _ eat.The dog was _loudly again and again.tootobarkingWhat do you think may happen before an e

9、arthquake?People could see _ lights in the sky.brightA NIGHT THE EARTH DIDNT SLEEPReadingnRead the passage through and try to get the main idea of each part.Sum up the main idea of each part of the passage.(try to use one word to describe first)Part 1:para 1Part 2:para 2&3Part 3:para 4signsdamagerec

10、overyBefore the earthquake,many strange things were happening in the countryside in northeast Hebei.PART 1:para 1During the earthquake,the city was destroyed and people were killed or injured.Shortly after the quake,the disaster lasted.PART 2:para 2&3After the earthquake,the army came to help,bringing hope for a new life.And the city began to recover.PART 3:para 4Homework Surf the Internet to find more information about the Tang Shan earthquake and the San Francisco earthquake.Read and recite the new words and phrases.