八下Unit7 SectionB 3a_Self Check -八年级下册英语同步精美课件（人教版）.pptxVIP

Unit7

What’sthehighestmountainintheworld?;LearningObjectives;Revision;Hereisariddle:

Theyarehugeanimals.

Theyliveinthesea.

Theycansingsongs.

Theycanjumphighoutofwater.

Theyareverycleverandalsoveryfriendly.

Whatarethey?;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，以致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。

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。;Readthefollowingwordsandphrasesaboutwhales.Puttheminthecorrectplaceinthechart.;Liveinthesea

Somekindshaveteeth

Learnmoreaboutwhales

Stopputtingrubbishintothesea

Singsongs

Whalepartssoldtomakethingslikecandlesandsoap;Whatdotheylooklike?;Whydosomeofthemhavetobeprotected?

;Writeaparagraphaboutwhalesandwhytheyneedtobeprotected.Usetheinformationin3a.Thenmakeaposter.;写作指导;Whalesarehugeanimals.Theyliveintheseaandeatsmallfishandothersealife.Theycanjumphighoutofthewaterandsingsongs.

Oneinterestingfactisthatwhaleslooklikefishbuttheyareverydifferentfromfish.Anotherinterestingfactisthattheycommunicatewitheachotherintheirspecialway—“whalesongs”.

Somekindsofwhalesareindangerbecausepeoplekillthemfortheirmeatandoilandusetheirbodypartstomakethingslikecandlesandsoap.

Weshouldstopputtingrubbishintotheseaandmakesomerulesonwhalepollution.Ithinkpeopleshouldlearnmoreaboutwhales.;SelfCheck;2.Matchverbsandobjects.Thenaddonemoreobjecttoeachlist.;1.Anelephantweighs(few/many)timesmorethanadog.

2.Anadultpandacaneat(much/alittle)morethanacat.

3.Canadaisa(little/lot)less____________(crowded)thanIndia.

4.Atigeris(much/alittle)_________(strong)thanaman.;选词填空。;voiceoutsideeveryonedangerby

losefunthemprotectfew;voiceoutsideeveryone