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1、Unit13WaterplanetＩ．单元教学目标技能目标GoalsTalkaboutwaterandtheocean.Practisemakingsuggestionsandexpressingopinions.ReviewModalVerbs.Writeanexplanationparagraph.II．目标语言功能句式Thewaterisbeingusedto/for...Weshould/could...Ifwe...,wecan...Itwouldbebetterto...Whatwillwe
2、doif...?Canyouthinkofabetterwayto...?词汇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,sensitive,steady,tr
3、ust,nursery,recreation,gallon2．认读词汇mariner,property,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,mixw
4、ith,takeadvantageof,giveoff,add..to...,playa(bad)trickonsb,protectfrom,avarietyof4．重点词汇9benefit,disadvantage,property,range,substance,dissolve,available,float语法TheModalVerbs-ReviewPossibility:can/could,may/mightcertainty:must,will,shouldAbility:can/could
5、,beabletopermission:can/could,may/mightRequests:can/could,will/wouldsuggestions:could/may/might,shallNecessity:must,haveto,havegotto,needadvice:should,oughtto,hadbetter重点句子1.Lifeintheoceansrangesfromthetiniestplanktonallthewayuptogiantslikesharksandwhale
6、s.2.Whatisitthatmakestheoceansuchagreatplacetolive?3.Thetwohydrogenatomsfromapolarmolecule,thatis,onewithaslightlypositiveendandonewithaslightlynegativeend.4.Thenutrientsinwhateverfallsintotheoceanwillquicklybecomeavailabletootherlivingcreatures.5.Marine
7、organismstakeadvantageofthedensityofwater.6.Ifitdidn’t,theoceanswouldbefrozensolid.7.Sincechangesinsalinityandtemperatureaffectwater’sdensity,thewaterintheoceanisalwaysmoving.8.Thecirculationaddsenergytothemarineecosystemsandmovesnutrientsaround.III．教材分析
8、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”9。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、密度、热容度以及大洋的运动等科学知识。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，还可以体会到英语的实
