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1、Unit13TheWaterPlanet教案Unit13TheaterPlanetPerid1ReadingTeahinggals:1TgettheSstunderstandtheainprpertiesfaterbnnetingtheithsenphenenaandlearningtexplainthephenena2Tenablethetbeaareftheiprtanefater,ainggdusefaterinaprperaandprtetingaterresuresTeahingste
2、ps:Step1:LeadinReadashrtpeandguessitsnae:Aletterfr_______(ater)DearUser,Shaetuall,theIgnrant,IaurlifeButuseenttvalueeGiveealltherespetFrineiseternallifeIfuntinueabusingeSurel,allfrsflifeillitheraaHaveueveriagined,Lifeithute?Itellu,itillbeunbearableTh
3、intieFreverdrpuntsQs:1)hatdes“Dearuser”hererefert?2)hatdesittaltitsusers?3)nhihplanetdesitexist?－ntheearth,hihisalsalledtheaterplanet4)Dunhitisalled“Theaterplanet”?－BeauseabutthreequartersftheearthisveredbaterStep2:Pre-readingLatthetitlesinthetextbel
4、DntreadthehletextPiutthesubetfeahparagraphUsethestruturesbeltaesixquestinsrelatedtthesubets(P19)Step3:hilereading:1Sitfindbasifatsabutlifeintheeansfrthepeningparagraph:Lifenearthbeganintheeansabutthreebillinearsag;99%fthelivingspaenearthisintheeans;T
5、hereareabutfiveillin(nn)speiesintheeans;Lifeintheeansrangesfrtinplantntgianthales2．Quiz:Truerfalsequestins:1）aterisaliquidatrteperature,andithasarelativelhighfreezingpint2）Thereasnhaterandisslvestsubstanesnearthisthataterhashighheatapait3）Liealltheth
6、ersubstanes,atergetssaller(ntrat缩小)henitfreezes4)Pureaterhasahigherfreezingpintandlighterthansaltater)Thesalinitftheearth’seansisabut3%6)henaterfreezes,itsdensitinreases7)therreursessuhasil,gas,gldetisaspreiusasadrpfrain8)Thereareabutfivebillinspeies
7、intheeansrangingfrthetiniestplantntgiantsliesharsandhales(billin---illin)9)Theaterleuleisadefthdrgenatsandnexgenat10)Pureaterhasahigherfreezingpintandislighterthansaltater(adef---adeupf)11)Ifasubstanehasadensit888g/3,itillflatnater12)Theheatapaitisre
8、lativelhigh,sthatstanialsdn’tlielivinginit(teperaturestable----lie)13)Thestiprtantthingeanlearnabutater,isthateustprtetitanduseitisel(TFFFFTTFFTTFT)3ultiplehies:(A)1BasednParaI,theauthrtellsusthattherearevariusspeiesintheeans,indiatingthat____Aaterpl
