人教版英语选修六Book6Unit5reading.ppt

The Power of NatureUnit 5ReadingDo you still remember what happened on May 26,2008?On May 12,2008,a strong earthquake measuring 8.0 on the Richter scale rocked Wenchuan in Sichuan province,some 92km northwest of Chengdu.Do you know any other natural disasters?Guess what they are according to the pictures.Facing natural disasters,how weak humans are!tsunamiearthquake snowstormfloodtyphoonsandstormdroughthurricanetornado landslide thunder/lightningvolcanoHowever weak we are,we are not completely powerless.People are trying many ways to learn about natural disasters all the time to protect themselves.Volcanoes begin to form when the rocks of the lower plate get pushed deep into the Earth.There they are heated,until they melt,forming magma,one kind of liquid rock,because magma is less dense than the solid rock around it,it is pushed upward.If the magma finds a weak place at the Earths surface,it may break through and form a volcano.How is a volcano formed?Can you imagine climbing into a live volcano in order to take the temperature of the boiling rock inside?Who will climb into a live volcano to take the temperature of the boiling rock inside?A volcanologistDo you want to be a volcanologist?An Exciting JobWorking as a volcanologist.In what way did the writer find the job exciting?Get the main idea of each paragraphPara 1Para 2Para 3Para 4Para 5The writer expresses his _for his job and why.The writer describes his _and its importance.The writer describes his first _of a volcano eruption.The writer describes his first closer _at a volcano eruption.The writer states again his _for his work and volcanoes.lovejobsightlookloveWhy is a volcanologists job important?It can warn people when the volcano is going to erupt and save many lives.Careful readingWhat made the author realize that an eruption occurred?A strange soundMy bed room became as bright as dayRed hot lava was fountaining hundreds of metres into the airMy bed began shakingWhat does the writer find impressive even after studying volcanoes for more than twenty years?The author is impressed by the beauty of the eruption and also by its potential to cause great damage.What make it difficult for the writer to walk towards the edge of the crater(three words)?Special protective suitsOn May 12,2008,a strong earthquake hit Wenchuan.The earthquake took place at 14:48 Beijing Time and tremors were felt as far as Wuhan,Shanghai and Beijing.Official figures stated that by June 23,2009,69181 had been confirmed dead,including 68,636 in Sichuan province,and 374,176 injured,with another 18,498 missing.The earthquake left about 4.8 million people homeless.Extended readingSo,how do earthquakes happen?The earth is made up of several layers.The top layer of the earth is called the earths crust.The crust is divided into sections which are called plates.When two plates push against each other.or when two plates rub against each other.an earthquake happens.An earthquake causes the ground above the plate to shakeThe energy source of the Wenchuan earthquake mentioned above came from the strike of the Indian Plate onto the Eurasian Plate and its northward push.Earthquakes are most likely to happen at the boundaries of the earths platesEach of these plates is about 70 kilometres thick