七年级英语Water课件

Unit:WaterGrade7English|ExploringtheSourceofLifeContentsClassOutlineExploretheworldofwaterthroughvocabulary,reading,grammarandcreativeexpression.01VocabularyBuilder核心词汇与水相关表达02ReadingComprehension阅读理解与篇章分析03Grammar&Facts语法要点与水知识拓展04Speaking&Writing口语表达与写作练习PART01VocabularyBuilderMasterthekeywordsaboutwateranditsforms.Chapter04·ScienceFormsofWaterWaterisuniquebecauseitexistsinthreestates:solid,liquid,andgas.Understandingtheseformsisthefirststeptomasteringwater-relatedvocabulary.Liquid(液体)Themostcommonform,foundinrivers,lakes,andoceans.Waterflowsfreelyandtakestheshapeofitscontainer.Rivers·Lakes·OceansSolid(固体)Whenwaterfreezesbelow0°C,itbecomesiceorsnow.Themoleculesslowdownandformrigidstructures.Below0°CGas(气体)Whenwaterboils,itturnsintosteamorwatervapor.Themoleculesmoverapidlyandspreadintotheair.100°CBoilingVocabularyBuilderAction&DescriptionVerbsandadjectiveshelpusdescribewhatwedowithwaterandwhatconditionitisin.Verbs(动词)Pour(倒)Tomakewaterflowfromacontainer.Freeze(结冰)Toturnintoiceduetocold.Boil(沸腾)Toheatwateruntilitbubbles.Adjectives(形容词)Pure(纯净的)Cleanandsafetodrink.Polluted(污染的)Dirtyandharmfultohealth.Precious(珍贵的)Veryvaluableandimportant.FILLINTHEBLANKSVocabularyPracticeApplyingnewwordsinsentenceshelpsmovethemfromshort-termtolong-termmemory.01Wemustprotectourriversfrombeing________.polluted02Inwinter,thelake________andbecomesaskatingrink.freezes03Please________meaglassof________water.pour/pure04Wateris________foralllivingthings.preciousPART02ReadingComprehensionFollowthejourneyofawaterdrop.Unit·WaterTheJourneyofaWaterDropThisreadingpassagepersonifiesawaterdroptoexplainthewatercycleandtheprocessofwaterpurificationinanengagingway.Pre-readingQuestionWheredoesourtapwatercomefrom?ThinkFirstMainCharacterDaisy,alittlewaterdropwhoguidesreadersthroughthejourney.DaisyKeyConceptTheWaterCycle—Evaporation,Condensation,andPrecipitation.Evap→Cond→PrecipTheWaterCycleStage1:EvaporationEvaporationistheprocesswhereliquidwaterturnsintogas(vapor)duetoheatenergyfromthesun.01Thesunshinesontheoceanandheatsthewater.HEATENERGY02Daisyfeelshotandturnsintowatervapor.WATERVAPOR03Sheriseshighintothesky,leavingthesaltbehind.RISESUPThesunheatsoceanwater,startingtheevaporationprocessWATERCYCLE·STAGE2Stage2:CondensationCondensationhappenswhenwatervaporcoolsdownandturnsbackintoliquiddroplets,formingclouds.Cloudformationthroughcondensation01AsDaisygoeshigher,theairgetscolder.ColderAir02Sheturnsbackintoatinyliquiddroplet.Droplet03Millionsofdropletsjointogethertoformacloud.CloudTheWaterCycleStage3:PrecipitationPrecipitationisanyformofwaterthatfallsfromcloudsandreachestheground,suchasrain,snow,orhail.Rainfallingfromcloudstotheground01Thewindblowsthecloudoverland.Wind02Thecloudbecomesheavywithwaterdroplets.Droplets03Daisyfallsdownasrain,wateringtheplantsandfillingrivers.RainTheWaterJourneyStage4:PurificationBeforereachingourtaps,watergoesthroughatreatmentplanttoremovedirtandbacteria,makingitsafetodrink.01Rainwaterflowsintoriversandreservoirs.Rivers&Reservoirs02Pumpscarrywatertoatreatmentplant.PumpStation03Chemicalsandfilterscleanthewaterbeforeitenterspipes.Chemicals&FiltersAwatertreatmentplant—whererawwateriscleanedandpurified.ComprehensionReadingCheckTestingcomprehensionensuresstudentshavegraspedthemainideasanddetailsofthetext.01WhatmakesDaisyturnintosteam?—Theheatfromthesun02Whatdomillionsofdropletsforminthesky?—Acloud03Wheredoesthewatergobeforeitreachesourhomes?—AtreatmentplantPART03Grammar&FactsExplorethescienceofwaterandhowtodescribequantities.GrammarFocusGrammar:UncountableNounsWaterisanuncountablenoun.Tocountit,wemustusemeasurewordsorcontainers.IncorrectIdranktwowaters.✗twowatersCorrectIdranktwoglassesofwater.✓glassesofMoreExamplesabottleofwateradropofwateraliterofwaterbottle·drop·literGrammarFocusGrammar:QuantifiersUse'much'withuncountablenounsinquestionsandnegatives.Use'alotof'or'plentyof'inaffirmativesentences.Questions&NegativesKeyword:muchHowmuchwaterdoyoudrinkeveryday?Thereisn'tmuchwaterleftinthebottle.AffirmativeKeywords:alotof/plentyofThereisalotofwaterintheocean.Wehaveplentyofwaterforthetrip.WATERFACTSAmazingFact1:DistributionWhilewatercoversmostofourplanet,theamountavailableforhumanuseissurprisinglysmall.0171%ofEarth'ssurfaceiscoveredbywater.71%0297%ofthatwaterissalty(oceans).97%03Only3%isfreshwater,andmostofitisfrozeninglaciers.3%WaterTypePercentageSaltwater(Oceans)97%Freshwater(Ice/Glacier)2%Freshwater(Liquid)1%ThevastmajorityofwateronEarthisnotsuitablefordrinking.AMAZINGFACTAmazingFact2:Life&BodyWateristheprimarycomponentofthehumanbodyandiscriticalforsurvival.FACT01Thehumanbodyisabout60%water.FACT02Thebrainandheartarecomposedof73%water.FACT03Wecanonlysurviveabout3to5dayswithoutwater.HumanbodywatercompositionPART04Speaking&WritingExpressyourideasonsavingwater.ClassDiscussionDiscussion:WaterScarcityWaterscarcityisaglobalissuecausedbypollution,overuse,andclimatechange.Drought-affectedlandscape—waterscarcityinactionPollutionFactoriespourwasteintoriversandlakes,makingwaterunsafeforpeopleandanimals.WasteOveruseFarmingusesalotofwatereveryday,andmuchofitiswastedintheprocess.FarmingClimateChangeRisingtemperaturesbringlessraintomanyareas,causingdroughtsanddryland.DroughtWaterConservationBrainstorming:SaveWaterSmalldailyactionscanmakeabigdifferenceinconservingwaterresources.AtHomeTurnoffthetapwhilebrushingteeth.Takeshortershowersinsteadofbaths.Fixleakingpipesandfaucetsimmediately.AtSchoolReportleakingtoiletstothejanitor.Useabroom,notahose,tocleanoutdoorareas.Starta'WaterMonitor'club.WritingSkillsWriting:AProposalStructureyourwritinglogically:Title→Problem→Solutions→CalltoAction.Step1TitleMakeitcatchyandmemorabletograbattentioninstantly.Astrongtitlesetsthetoneforyourentireproposal.Example"EveryDropCounts"Step2IntroductionStatetheproblemclearly—waterispreciousbutincreasinglyscarce.Usefactstobuildurgency.FocusTheProblemStep3BodyListthreespecificactionsthateveryonecantaketohelp.Makethempracticalandeasytofollow.Content3ActionsStep4ConclusionEncourageeveryonetojoininandmakearealdifference.Endwithhopeandclearnextsteps.FinalStepCalltoActionWriting·ProposalExampleExample:EveryDropCountsUseimperativesentences(commands)togiveadviceinproposals.01'Waterislife,butwearewastingiteveryday.'问题陈述·Statement02'First,turnoffthetapwhenyoubrushyourteeth.'祈使句·Imperative03'Second,reusewaterfromwashingvegetablestowaterplants.'祈使句·Imperative04'Let'sworktogethertoprotectourblueplanet!'号召·CalltoActionReviewTimeQuickQuizReviewingkeyconceptsreinforceslearningandidentifiesareasneedingmorepractice.Question01Whatisthechemicalformulaforwater?H₂OQuestion02Namethethreestatesofwater.Solid·Liquid·GasQuestion03Is'water'countableoruncountable?UncountableQuestion04WhatpercentageofEarthiscoveredbywater?71%Philosophy&WisdomCulture:WaterinWisdomWaterisapowerfulsymbolinphilosophyandliteratureacrossdifferentcultures.TheHighestGoodLaozisaid:"Thehighestgoodislikewater."(上善若水)上善若水BenefitsAllThingsWaterbenefitsallthingswithoutcompetingwiththem.NoCompetitionStayFlexibleItteachesustobeflexibleandadaptableinlife.AdaptableEnglish·IdiomsIdiomsaboutWaterIdiomsaddcolortoyourEnglish.Learnthesecommonwater-relatedexpressions.InhotwaterIntroubleordifficulty.TROUBLELikewateroffaduck'sbackHavingnoeffectonsomeone.NOEFFECTTotestthewatersTotrysomethingoutcautiously.TRYITOUTWaterunderthebridgePasteventsthatarenolongerimportant.LETITGOUNIT·WATERScience:SurfaceTensionWatermoleculessticktogethertightly,creatinga'skin'onthesurfacethatcansupportlightobjects.Awaterstriderwalksonwater—surfacetensioninactionExperimentFloatapapercliponwaterandwatchitrestonthesurface.ReasonCohesionbetweenwatermoleculescreatesinvisiblesurfaceforce.RealLifeSomeinsectscanwalkonwaterthankstosurfacetension!FreshwaterAwarenessWorldWaterDayCelebratedonMarch22nd,WorldWaterDayfocusesattentionontheimportanceoffreshwater.AnnualDateMarch22ndeveryyear,aglobalcalltoactionforwaterawarenessandconservationeffortsacrossnations.March22CoreGoalAdvocateforthesustainablemanagementoffreshwaterresourcesworldwidethroughpolicyandeducation.Sustainable2024T