Unit6EarthfirstStartingOut课件高一英语

Unit6EarthFirst新外研必修Book2StartingOutP61LearningobjectivesInthisclass,youwillgraspthemainideaofthevideo;finishthespecificquestionsaboutthevideo;sayoutwhatenvironmentalproblemeachcartoonrefersto;talkaboutthemostseriousenvironmentalproblemwefacetoday.WhatwilltheEarthlooklikein100years?Or...itlookslikethis.Pre-viewingWhile-viewingWhat’sthevideomainlyabout?Answerthequestionsafterviewing.1.Whichofthefactsinthevideodoyoufindmostalarming?

While-viewingdeforestationspecies’extinctionshortageoffreshwaterplasticpollutionlossofglaciersAnswerthequestionsafterviewing.2.Whatdoesthevideowanttotellus?Severeenvironmentalproblemswearefacingnowadaysmakeourfutureuncertain.It’stimeforeveryonetotakeactionnowandmakeourplanetagreenerandsaferplaceforourfuturegenerations.While-viewing1)_______squarekilometersofforestdisappeareveryyear2)around_______treesarecutdowneachdayjusttomaketoiletpaper3)eachday,around_______to_______speciesofplantsandanimalsbecomeextinct-nearly_______timesthenaturalrateofextinction4)over________animalsarekilledbyoceanpollutioneachyear5)_______

peopledon'thavecleandrinkingwater6)aplasticbottlecantake______yearstobreakdown7)theicecapsaremorethan______thinnerthantheywere______yearsagoWhile-viewing3.Completethemissingnumbersafterviewing.130,00025,0001502001,0001million1billion45050%40While-viewing4.Howdoyoufeelwhenwritingdownthesenumbers?1.Lookatthepicturesanddescribethemwithyourownwords.

Post-viewingWaterpollutiondeforestationWhatenvironmentalproblemdoeseachcartoonreferto?Waterpollutionresultswhencontaminants(污染物)areintroducedintothenaturalenvironment.Inturn,thiscanleadtopublichealthproblemsforpeoplelivingdownstream.Waterpollutionistheleadingworldwidecauseofdeathanddisease.WaterpollutionWaterpollutiondeforestationWhatenvironmentalproblemdoeseachcartoonreferto?Treesarecutdownforuseasbuildingmaterialorsoldasfuel.Theremovaloftreeswithoutsufficientreforestationhasresultedinhabitatdamage(栖息地破坏),biodiversityloss(生物多样性减少),andaridity(干旱).DeforestationWaterpollutiondeforestationWhatenvironmentalproblemdoeseachcartoonreferto?Airpollutionmaycausediseases,allergies(过敏)andevendeathtohumans;Itmayalsocauseharmtootherlivingorganismssuchasanimalsandfoodcrops,andmaydamagethenaturalorbuiltenvironment.AirpollutionWaterpollutiondeforestationWhatenvironmentalproblemdoeseachcartoonreferto?Globalwarmingisthelong-termwarmingoftheplanet’soveralltemperature.Thelong-termeffectsofglobalwarmingincludefurthericemelt,oceanwarming,sealevelrise,andoceanacidification(酸化).GlobalWarming2.Whatarethecausesoftheseproblems?Post-viewingWaterpollutionDeforestationAirpollutionGlobalwarming3.Whatdoyouthinkisthemostseriousenvironmentalproblemwefacetoday?Post-viewingdeforestationspecies’extinctionwaterpollutionoceanpollutionshortageoffr