2019-2020年高二英语Unit13 The water planet(I)

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1、2019-2020年高二英语Unit13Thewaterplanet(I)Ⅰ.BriefStatementsBasedontheUnitAsweallknow,theearthisanoceanplanetand99%percentofthelivingspaceonearthisintheoceans.Itiswaterthatmakestheoceansuchagreatplacetolivein.Thisunitmainlydealswiththepropertiesofwaterandhowthepropertiesofwatermaketheoce

2、anbeesoimportant.Welearnthisunittohelpstudentsnotonlyknowaboutthepropertiesofwater,butalsolearnhowtousewaterinagoodway.Besides,welearnthisunittoletstudentsrealizetheimportanceofprotectingwater.Ofcourse,itisnecessaryforstudentstomastertheimportantphrasesandsentencesintheunit.Meanwhi

3、leweshouldreviewsomeimportantusageofModalVerbs.Ⅱ.TeachingGoals1.Talkaboutwaterandtheocean.2.Practisemunicativeskills.3.ReviewModalVerbs.4.Writeanexplanationparagraph.Ⅲ.BackgroundInformationWhatLiesundertheBlueWater?Justlikethehouseswelivein,theoceanhasseveral“floors”orlayers.Differ

4、entfishliveondifferentlayersandareneighbours,thoughnotalwaysfriendlyones!Theocean’stoplayeristhesunlitzone(透光层).Itgoesdowntoaround200metersbelowwater.Thislayeriswarmandbright.Itisalsohometomostplantsandfish.Manyfishinthislayerarestreamlined,sotheycanquicklyswimfromdangerandcatchfoo

5、d.Thetwilightzone(弱光层)isthenextlayerandisfromabout200to600metersbelowwater.Almostnoplantsgrowhere.Manyanimalsinthiszoneswimuptothesurfaceatnighttofeed,andmoveintodeeperwatersduringtheday.Theyalsoeateachother,somanyofthemhavesharpteethandverybigmouths.Manyfishinthiszonedon’thaveastr

6、eamlinedbodybecausetheylieandwaitforpreytoetothem.Belowthetwilightlayeristhemidnightzone(无光层).Itisfrom600meterstothebottomofthesea.Thewateriscoldandpletelydark.Noplantsliveherebutmanysmallanimalscan.Manyanimalsinthetwilightandmidnightzonesproducetheirownlights.Theangler-fish(琵琶鱼)is

7、oneofthem.Ithasabeautifullightonitsheadtoattractprey!MaybeyouhaveseenoneofthecoolestfilmsFindingNemo(《海底总动员》).DoyourememberMarlin,Nemo’sfather,“borrowed”lighttohelpDoryread?Thatwasn’taflashlight,itwasafish!Theyalsouselighttofrightenenemiesandto“talk”witheachother.2.WaterAfamilyofsi

8、xneedsover20gallonsofwater