高中英语-Global warming教学课件设计

Unit4ReadingTheearthisbecomingwarmer,butdoesitmatter?

LearningAims1.Tolearnsomeimportantwordsandphrasesaboutglobalwarming.2.Todevelopthereadingskillsbyskimmingandscanningthepassage.3.Tostrengthentheawarenessofenvironmentprotection.Pre-reading1.What'sthemaintopicofthepassage?Themaintopicofthepassageisabout

.2.Whowrotethemagazinearticle?Whatisthenameofthemagazine?

wrotethemagazinearticle;thenameofthemagazineis

.3.Whatarethenamesofthethreescientistsmentionedinthearticle?Thenamesofthethreescientistsmentionedinthearticleare

,

and

.Dotheyagreewithoneanother?

globalwarmingSophieArmstrongEarthCareDrJaniceFosterCharlesKeelingGeorgeHambley

No,theydon’t.Part1Part2Part3C.Introductionofglobalwarming

(1)(2-5)(6)A.

HowglobalwarmingcomesaboutB.ListtwodifferentattitudestowardsglobalwarmingPart4(7)D.Whetherpeopleshoulddosomethingaboutglobalwarming

Step1Fastreading1.Howmuchdidthetemperatureriseinthe1900s?

A.OnedegreeFahrenheit.

B.OneCelsius.

C.Twodegrees.

D.ThirtydegreesCelsius.2.Whatcausestheearth’stemperatureincreasing?A.CuttingtreesB.Wastingthefarmland.C.RunningoutoftheriverwaterD.Burningfossilfuels.3.WhichofthefollowingisDr.JaniceFoster’sopinion?A.Theresultofthetemperatureincreasewillbeserious. B.Theamountofwarmingisnothingserious.C.Weneedn’tworryabouthighlevelsofcarbondioxide.D.Globalwarmingisanaturalphenomenon.4.AccordingtoGeorgeHambley,

.A.Globalwarmingisaseriousproblem.B.Thereisnoneedtoworryaboutglobalwarming.C.ThelevelsofCO2intheairwillbecomelowerinthefuture.D.Moreanimalswillmakegreenhousegasesdecrease.5.Wecaninferfromthetextthat__________.A.thedebateabouttheeffectsofglobalwarminghasnotbeensettled.B.thegreenhouseeffectistheresultofpeople’sactions.C.allscientiststhinkitisimportanttoreducetheamountofCO2intheatmosphere.D.reducinggreenhousegaseswillimmediatelydecreasetheearth’stemperature.

Step2Carefulreading(Para.2-Para.3)

Thereasonsforglobalwarming

.

.humanactivity

theburningoffossilfuels

greenhousegases

carbondioxide

methane

watervapour(Para.4-Para.5)

Thelevelsofcarbondioxidehaveincreasedgreatlyoverthelast

.AccordingtoDr.CharlesKeeling,from

to

,theamountintheatmospherewentupfromaround

partstoaround

partspermillionDr.JaniceFosterbelievesoverthenextcentury,theamountofwarmingcouldbeaslowas

degreesCelsius,butitcouldalsobeashighas

degrees.

100to150years

19571997

315

370

1to1.5

5Part3(6-7)

ariseintheseelevelseverestormsdroughtsfloodsoptimisticItwillcause:pessimisticItisa_______thing,

whichmakesplantsgrow______;cropswillproduce

_____;itwillencourageagreaterrangeof_______－allofwhichwillmakelife_____.positivequickermoreanimalsbetterDr.JaniceFosterGeorgeHambley

Step3Furtherreading（）1.Thetemperatureinthelastcenturyseemedtoincreasemuch.（）2.Everyonebelievesthatglobalwarmingiscausedbytheactivitiesofhumans.（）3.Theriseincarbondioxideiscausingasteadyincreaseinglobalwarming.（）4.GeorgeHambleybelievesthatglobalwarmingwilldogoodratherharmtotheearth.（）5.Itisclearwhattheeffectsofglobalwarmingwillbe.

F

T

T

T

F

Step4RetellingThetemperatureoftheearth1

(rise)aboutonedegreeduringthe20thcentury.Howhasthiscome

2

?Allscientistssubscribe3

theviewthatitishumanactivity4

hascausedthe5

(globe)warmingrather6

arandombutnaturalphenomenon.Somescientiststhinkweaddlarge7

(quantity)ofcarbondioxidetotheair.Somescientistsbelievetheburningofmoreandmorefossilfuels8

(have)resultedintheincreaseofcarbondioxide.Greenhousegasescontinuetobuild9

.ItmaybeacatastrophebutGeorge10

(state)thatitisapositivething.

rose

about

to

that

global

than

quantities

has

up

states

Step5Freetalk-----AspeechPart3(6-7)Opinion1:Weshalldosomethingaboutglobalwarming.Opinion2:Weshalldonothingaboutglobalwarming.FreetalkBoysandgirls,Itisagreathonorformetogivethespeechaboutglobalwarming.AllourgroupmembersareinfavorofOpinion1because........................