广西钦州市高二英语《Unit 13 The properties of waterintegrating》课件 新人教版.ppt

integratingskills o nature snursery estuaries skimming findthedefinitionofanestuary anestuaryisthebodyofwaterwherearivermeetstheocean saltwaterfromtheoceanandfreshwaterfromtherivermixtogetherinanestuary thismixingoffreshandsaltwatercreatesauniqueenvironmentfilledwithlifeofallkinds azonebetweenthelandandsea structureofthepassage 1 2 4 3 1 2 4 3 1 2 3 4 mainideaofthepassage estuariesarethenurseryforlifeintheoceansandrivers 更多资源 questions 1 whyareestuariessuchgoodplacesfornature syoungone 2 whatdoesdensitymeaninthispassage 3 howdoestuariesaffectthewaterthatpassesthroughthem 4 whyareestuariesmoresensitivetopollutionthanotherareas 5 whyareestuariesimportanttohumanbeings scanning q1 becausethehabitatprovidesallthebenefitsoftheocean energyandnutrients withoutthedangers wavesandstorms q2 density meansthenumberofspeciesperareainthispassage q3 estuariesabsorbnutrientsandpollutantsfromwatercomingfrominlandsources thuscleaningourwater q4 sinceestuariesactasfilters manypollutantsendupintheestuaries q5 estuariesareimportanttohumanbeingsbecauseweliketostudyandrelaxinthemandbecausetheycontributetotheeconomythroughtourismandfishing languagepoints 1 providesth forsb 提供某物给某人providesb withsth把某物提供给某人weprovidefoodforthehungrychildren weprovidethehungrychildrenwithfood 我们应该为受害者 sufferers 提供钱和帮助 weshouldprovidemoneyandhelpforthesufferers weshouldprovidethesuffererswithmoneyandhelp youhadbetterprovideagainsttyphoon it stheyouth sdutytoprovidefortheolds therulesinschoolprovidethatthestudentsshouldrespecttheteachers 2 avarietyofsth各种各样的theshopping centresellsavarietyofgoods childrendobadlyatschoolforavarietyofreasons 3 contributetoprep有助于 促使 预防 赡养 规定 filltheblanks estuariesaretheareas arivermeetstheocean itisatransitionzonebetween waterand water manyspeciesliveintheestuariesbecausethey energy nutrients andshelterfromthedangersoftheopensea theenergyintheestuariescomesfromthe whichiscalmerandsaferthanthewavesandwindsoftheopenocean sinceriversmeettheseainestuaries comefromboththelandandtheocean estuariesalsoprovideshelter islands mud andsandforma wallagainstmanyofthedangersoftheopenoceans thesafeandnutrient richenvironmentattractsa ofspecies somelivehereallthetime otherscometoestuariestofeedand where fresh salt provide tide nutrients variety reproduce protective whydosomanyspeciesliveinestuaries writeyourownparagraphs topic step1 step2 step3 whatwillhappenifyouputanicecubeintowater describewhathappens describethecausesandeffects theconclusion anexplanationparagraph 说明文 samplewriting thereasonanicecubefloatsisthewaythedensityofthewaterchangeswithtemperature densityistherelationshipbetweenmassandvolume itismeasuredinkilogrammespercubicmetre asubstancewithlowerdensitywillstayontopof orfloaton asubstancewithhigherdensity thedensityofpurewateris1 000kg m3 soifasubstancehasahigherdensity forexample2 000kg m3 itwillsink ifthedensityislower say500kg m3 itwillfloatonthewater thedensityofwaterdecreaseswhenwaterfreezes thatmeansthatanicecubehaslowerdensitythanwater thus therefore anicecubewillfloat ifyouaredescribingaprocess youshouldexplaineachstepintheorderithappens tellthereadersaboutthecausesandeffectsandusewordslikefirst second then etctoshowtheorderofthesteps tip1 first second third then last ifyouarewritingaboutsomethingthathasseveralparts describeeachpartande