人教版(新课标)英语八年级下册：Unit-7-Section-B-(3a-Self-Check).pptVIP

SectionB(3a-SelfCheck)Unit7Whatsthehighestmountainintheworld?

学习目标Keywordsphrases:wale;oil;protection;huge;waterpollution;beprotected;indanger.Keysentences:1.Whydosomeofthemhavetobeprotected?2.Howcanweprotectthem?3.Weshouldprotectwhalesfrom...Towriteapassageaboutanimalprotection.

WarmingupCanyouguesswhattheanimalis?Theyarehugeanimals.Theyliveinthesea.Theycansingsongs.Theycanjumphighoutofwater.Theyareverycleverandalsoveryfriendly.Whatarethey?Theyarewhales.

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鲸的体型是世界上存在的动物中最大的，鲸是终生生活在水中的哺乳动物，对水的依赖程度很大，以至于它们一旦离开了水便无法生活，鲸形状像鱼，鼻孔在头的上部，用肺呼吸。体长可达三十米，是现在世界上最大的动物。Doyouknow?

鲸为适应水中生活，减少阻力，它们的后肢消失，前肢变成划水的浆板。身体成为流线型，酷似鱼。因而它们的潜水能力很强，小型齿鲸可潜至100-300米的水深处，停留4-5分钟，长须鲸可在水下300-500米处待上1小时，最大的齿鲸--抹香鲸能潜至千米以下，并在水中持续2小时之久。Doyouknow?

BrainstormCanyousayanythingelseaboutwhales?

3aPre-writingReadthefollowingwordsandphrasesaboutwhales.Puttheminthecorrectplaceinthechart.Humanscatchwhalesformeat, Liveintheseafatandoil SomekindshaveteethEatsmallfishandothersealife LearnmoreaboutwhalesJumphighoutofthewater StopputtingrubbishintotheseaRulesonwhaleprotection SingsongsHuge WhalepartssoldtomakethingsWaterpollution likecandlesandsoap n.油；食用油；石油n.保护；保卫adj.巨大的；极多的

Whatdotheylooklike?Wheredotheylive?Whatdotheyeat?Whatcantheydo?·Huge·Somekindshaveteeth·Inthesea·Smallfishandothersealife·Jumphighoutofthewater·Singsongs

Whydosomeofthemhavetobeprotected?Howcanweprotectthem?·Humanscatchwhalesformeat,fatandoil·Waterpollution·Whalepartssoldtomakethingslikecandlesandsoap·Rulesonwhaleprotection·Learnmoreaboutwhales·Stopputtingrubbishintothesea

3bWriteaparagraphaboutwhalesandwhytheyneedtobeprotected.Usetheinformationin3a.Thenmakeaposter.Whalesare…Theylivein…Theye