【精品】高中英语（人教大纲）第二册上：Unit10 Frightening nature(第一课时)VIP免费

Unit10FrighteningnatureI.BriefStatementsBasedontheUnitHaveyouexperiencedaterriblenaturedisaster?Certainlyfewofushave.Doyouwanttoknowsomethingaboutit?Certainlymanyofusdo.Afteryouhavelearnedthisunit,Unit10.Frighteningnature,youaresuretoobtainsomeusefulinformationaboutthat.Theunitwillbetaughtinfourperiods.Inthefirstperiod,we'lldealwithWarmingup,ListeningandSpeaking.Atthebeginning,fourpicturesareshowntothestudents.Theyareaskedtotalkaboutthemandthenwritedownwhatisobserved.Thepicturesareaboutgeology,meteorology,astronomyandbiology,includingtyphoon,cobraandcells.Thepicturesandthequestionsafterthemcangreatlystimulatethestudents'interestinscience.ListeningisaboutweatherforecastintheUSA.Theexercisesoflisteningcantesthowthestudentsgraspthedetailedinformationinit.Speakingprovidesalltypesoftopicsforthestudentstotalkabout.Whentheyfinishtheirtalking,alotofusefulexpressionsonhowtoexpressemotion,anxietyandfeararemasteredbythem.Inthesecondperiod,we'lldealwithPrereading,ReadingandPost-reading.Inthebeginning,thestudentswillseeandtalkaboutthreepicturesaboutafamousvolcanovesuvius,whichonceeruptedabouttwothousandyearsago,anddestroyedtwosmalltowns.Thenthewholetextgivesusavividpictureatthattime.Itdescribeshowthewriter’suncledied.Hisuncle,attractedbythesceneofvolcanoeruption,wantedtoobserveandrecordmoreaboutthat.Sohedecidedtogoandseeitfromcloser.Hewentthereandrescuedhisfriend'swife.Thenhewenttoseeanotherfriendofhis,wholivedveryneartotheeruptingvolcano.Heevenencouragedthescaredpeopletocalmdown.Butunfortunately,hediedatlast.Heonlythoughtaboutlearningmoreaboutvolcanoandwasn'tafraidatall.Hevaluedscientificknowledgemorethanhislife.Inthethirdperiod,wedealwithWordstudyandagrammaritem--Ellipsis.Plentyofexercisesarearrangedforit.Thestudentswillmasteritthroughpractice.Integratingskillsaredeltwithinthefourthperiod.Thetextisaboutaship,controlledbythecaptainandhiscrew,fightingagainstaterribletyphoon.Thestorywithoutendasksthestudentstousetheirimaginationandwritehowitwillend.Wearesurethatwhentheunitisfinished,thestudentswillnotonlyimprovetheirabilitytolisten,speak,readandwrite,butalsolearnandmasterplentyofusefulwordsandexpressions.II.TeachingGoals1.Talkaboutnaturaldisastersvolcanoes,hurricanesandtyphoons.2.Expressemotion,anxietyandfear.3.LearnaboutEllipsis.4.Practisecreativewriting.III.TeachingTime:FourperiodsIV.BackgroundInformation1.Volcanoes用心爱心专心1Therearethousandsofvolcanoesallovertheworld.Whatmakesvolcanoes?Whathappens?Theinsideoftheearthisveryhot.Becauseitisvery,veryhot,therockhasmeltedlikeice.Ithasbecomeliquid,likewater,hisalwaysboiling,likewaterinakettle.Ifyouhaveseenakettleboiling,youknowthatthesteamandboilingwatertrytogetout.Theveryhotinchedrockinsidetheearthalsotriestogetout.Usuallyitcannotbecausetheoutsideoftheearthistoothickandstrong.Butinsomeplacestheoutsideoftheearthisthinandweak.Sometimesacrack(asmallopening)appears.Thehotmeltedrock,whichwecall“lava”.pushesupthroughthecrackandburststhrough.Steamandgasshootupintotheairandthehotmeltedlavapoursout.Bigpiecesofrockmaybethrownhighintotheair.Afterawhilethevolcanobecomesquietagain.Themeltedlavabecomeshard.Laterthesamethinghappensagainandagain.Eachtimemorehotlavapoursoutontopofthecoldlavaandthenbecomeshard.Inthiswayakindofmountainisbuiltup,withaholedownthemiddle.Perhapsthevolcanowillthenbequietandnomorelavawillburstout.Perhapsitwillstartagainhu...