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1、Unit13WaterplanetＩ．单元教学目标技能目标GoalsTalkaboutwaterandtheocean.Practisemakingsuggestionsandexpressingopinions.ReviewModalVerbs.Writeanexplanationparagraph.II．目标语言Thewaterisbeingusedto/for...功Weshould/could...能Ifwe...,wecan...句Itwouldbebetterto...式Whatwillwedoif...?Canyouthinkofab
2、etterwayto...?1．四会词汇cube,sailor,benefit,transport,range,unique,hydrogen,atom,oxygen,relative,solid,freezing,pure,gramme,relationship,mass,cubic,kilogramme,float,decrease,substance,centigrade,absorb,thus,stable,词sensitive,steady,trust,nursery,recreation,gallon2．认读词汇汇mariner,pro
3、perty,plankton,molecule,salinity,dissolve,density,volume,capacity,motion,dense,estuary,tide,mammal,reproduce,pollutant,erosion,define3．词组搭配benefitfrom,alltheway,bemadeupof,freezingpoint,becomeavailableto,mixwith,takeadvantageof,giveoff,add..to...,playa(bad)trickonsb,protectfro
4、m,avarietyof4．重点词汇第1页共9页benefit,disadvantage,property,range,substance,dissolve,available,floatTheModalVerbs-ReviewPossibility:can/could,may/might语certainty:must,will,shouldAbility:can/could,beableto法permission:can/could,may/mightRequests:can/could,will/wouldsuggestions:could/m
5、ay/might,shallNecessity:must,haveto,havegotto,needadvice:should,oughtto,hadbetter1.Lifeintheoceansrangesfromthetiniestplanktonallthewayuptogiantslikesharksandwhales.2.Whatisitthatmakestheoceansuchagreatplacetolive?重3.Thetwohydrogenatomsfromapolarmolecule,thatis,onewithaslightl
6、y点positiveendandonewithaslightlynegativeend.句4.Thenutrientsinwhateverfallsintotheoceanwillquicklybecome子availabletootherlivingcreatures.5.Marineorganismstakeadvantageofthedensityofwater.6.Ifitdidn’t,theoceanswouldbefrozensolid.7.Sincechangesinsalinityandtemperatureaffectwater’
7、sdensity,thewaterintheoceanisalwaysmoving.8.Thecirculationaddsenergytothemarineecosystemsandmovesnutrientsaround.III．教材分析与教材重组1．教材分析本单元以WaterPlanet“水的星球”为话题,但课文主要谈论的是Thewaterontheplanetwherethehumanbeingslive,“星球（地球）的水”。通过本单元教学，学生利用所学英语知识，同时联系其他学科所学知识，了解水的特性、化学结构，还了解海水（咸水）的盐度、
8、密度、热容度以及大洋的运动等科学知识。第2页共9页通过本单元的学习，学生不仅可以了解到英语（科技）说明文的特点和写作手法，
