natural disaster.ppt
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1、Unit22EnvironmentalProtectionLesson3naturaldisasters1.grand adj.big and very impressive 2.scale n.the size or level of sth 3.separation n.the condition of being separated 4.rough adj.unpleasant or difficult 5.mountainous adj.having many mountainsWord Review巨大的巨大的规模规模,大小,大小分离,分开分离,分开艰难的艰难的多山的多山的6.sli
2、p v.fall off 7.slide v.to move smoothly over a surface 8.landslide n.sudden fall of a lot of earth or rocks down a hill,cliff 9.shabby adj.old and in bad condition 10.construct v.build Word Review滑落滑落滑行滑行滑坡,山崩滑坡,山崩破烂的破烂的建造建造Warm UpDefinitionNatural disaster is the consequence of a natural hazard,suc
3、h as floods,droughts,mud-rock flows,seismic sea waves,earthquakes,windstorms and the stretching of new deserts which affects human activities.自然灾害是影响人类活动自然风险,例如洪水,干旱、自然灾害是影响人类活动自然风险,例如洪水,干旱、泥石流、海啸、地震,风暴和沙尘暴。泥石流、海啸、地震,风暴和沙尘暴。What do you know about natural disasters?Warm UpWhat do you know about natur
4、al disasters?Lets do a quiz.1.Which country has the largest number of active volcanoes?A.Japan B.Indonesia2.Where do most earthquakes occur?A.at mountainous areas B.at plate(板块)(板块)boundaries3.What do you do in an earthquake?A.Run to a brick building B.Get to an open area4.Most tsunamis(海啸海啸)are cau
5、sed by .A.Earthquakes B.Hurricanes Many years ago,an earthquake attacked Wenchuan.It was on a grand scale.Thousands of people lost their wives,children The separation from their families made them live a rough(or hard)time.During the quake,houses fell down.In the mountainous area stones,bricks slip
6、and slide downhill in the landslides.People lived in shabbyhouses or tents.However Sichuanese are very strong.With the help of the whole nation,they constructed their homes soon.Now a new Wenchuan stands in front of us.Look back to 2008 BrainstormBesides earthquake,there are manynatural disasters,ca
7、n you name some?typhoon tsunamithunderstorm Natural disasaters droughtslandslidevolcanic eruption forest firefloodPart IPre-reading1.What disasters have been threatening the lives on the earth?droughtearthquake2008 Wenchuan earthquakefloodforest firehurricanelandslidetsunamityphoonvolcanic eruptionJ
8、uly 15,1991.Mt.Pinatubo on Luzon Island in the Philippines erupted,blanketing 750 square kilometres with volcanic ash.More than 800 died.Task 1 Gap-fillingUse the strategies to complete the gaps in the text(1-5)with these sentence(a-g).There are two extra sentences you donot need.Part IICareful-read
9、ingReading strategies:completing texts with sentence gaps(a)read the text to get the general idea.(b)read a paragraph with a sentence gap and identify the topic.(c)read the sentences before and after the gap and look for clues about the missing setence.(d)certain words may help you:time references,p
10、ronoun references,linking words.(e)decide which sentence goes in the gap.check that it fits the sentences before and after it.(a)But evidence shows that 73,000 years ago there was a much greater eruption.(b)Even Europe has suffered and large areas have been underwater.(c)That is probably not the mos
11、t important factor either.(d)Third,the other bits of land you might have been able to farm are now useless.(e)On top of that add global warming.(f)For example,the Yellow River,once famous for flooding,failed to reach the sea at all for 226 days in 1997.(g)One answer is overpopulation.vReferenceWords
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