人教新课标英语必修1unit4 课件warming up.ppt

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1、Unit4Warmingupandpre-readingEarthquakesfireNaturalDisastersfloodtyphoonsnowslide(雪崩)volcano(火山)mudflowsandstormTsunami(海啸）earthquakeHowmuchdoyouknowaboutanearthquake?Manypeopledied…Peoplelosttheirhomes…Manythingsweredestroyed...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Manypeoplebelie

2、vethat“itisalwayscalmbeforeastorm,”lookcarefullyatthetwophotos.Now,imaginetherehasbeenabigearthquake.Describewhatmighthappentotheobjectsinthephotos.TangshanTangshan,HebeiJuly28th,1976SanFrancisco1906年,旧金山地震后街景1906年,地震后旧金山市区被扭曲的电车轨道Tallbuildingsweredestroyed.Roadswerecracked.Peoplewereinjured.Thecit

3、ywasinruins.Doyouknowwhyanearthquakehappens?PacificplateAmericanplateEurasianplateIndianplateAfricanplateAntarcticplate★SanFranciscoParagraph4•PacificplateNorthSouthWestEastAmericanplateEarthquakeHappensWhydoearthquakeshappen?Scientistsexplainthattheoutsideoftheearthismadeofanumberofdifferentplates

4、.AtSanFranciscothePacificplatewhichismovingtowardsthenorthwestmeetstheNorthAmericanplate.ThePacificPlateismovingveryslowly—at5.3centimetersayear.Sometimesthesetwoplatesstopanddonotmoveforyears.Thensuddenly,theyjumpandanearthquakeisfelt.Asaresultofthemovementoftheseplates,westAmericaneartheseahasalw

5、aysbeenabadplaceforearthquakes.Whenthe1906earthquakehappened,thepacificplatejumped5-6metrestothenorth.Imagineyourhomebeginstoshakeandyoumustleaveitrightaway.Youhavetimetotakeonlyonething.Whatwillyoutake?Pre-readingpersonalwashingthingsabottleofwatermoneytorchmobilephonefoodandsweetsblanketmedicineY

6、ouwilltake:2.Whatstrangethingswouldhappenbeforeanearthquake?BrightlightsflashintheskyAnimalsaretoonervoustosleep,suchascats,dogs,chickens,horses,ducksandrabbits,etc.Whatdoyouthinkmayhappenbeforeanearthquake?Thewaterinthewells____and____.Andsomedeep______couldbeseeninthewellwalls.A______gascameoutth

7、ecracks.rosefellcrackssmellyWhatdoyouthinkmayhappenbeforeanearthquake?Miceranoutofthefields___________placestohide.Fish_________outofbowsandponds.lookingforjumpedWhatdoyouthinkmayhappenbeforeanearthquake?Th