人教版八年级英语下册课件Unit7SectionB(3alfcheck)

SectionB(3a-SelfCheck)
Unit7What'sthehighestmountainintheworld?
Theyarehugeanimals.
Theyliveinthea.
Theycansingsongs.
Theycanjumphighoutofwater.
Theyareverycleverandalsoveryfriendly.
Whatarethey?
Canyouguesswhattheanimalis?
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。
3a
Readthefollowingwordsandphrasaboutwhales.Puttheminthecorrectplaceinthechart.
Whatdotheylooklike?
Wheredotheylive?
Whatdotheyeat?
Whatcantheydo?
Huge
Somekindshaveteeth
Inthea
Smallfishandotheralife
Jumphighoutofthewater
Singsongs
Whydosomeofthemhavetobeprotected?
Howcanweprotectthem?
Humancatchwhalesformeat,fatandoil
Waterpollution
Whalepartssoldtomakethingslikecandlesandsoap
Rulesonwhaleprotection
Learnmoreaboutwhales
Stopputtingrubbishintothea
Singsongs(tomakepeoplemoreawareoftheimportanceofprotectingwhales)
3b
Writeaparagraphaboutwhalesandwhytheyneedtobeprotected.Utheinformationin3a.Thenmakeaposter.
Whalesare…Theylivein…
Theyeat…Theycan…
Oneinterestingfactis…
Anotherinterestingfactis…
Somekindsofwhalesareindangerbecau…
Weshouldprotectwhalesfrom…
Ithinkpeopleshould/shouldn’t…
Whalesarehugeanimals.Theyliveintheaandeatsmallfishandotheralife.Oneinterestingfactiswhalescanjumphighoutofwater.Somekindsofwhalesareindangerbecauhumanscatchthemformeat,fat,andoil,anduwhalepartstomakecandlesandsoaps.
Whalesarealsoindangerfromwaterpollution.Weshouldprotectwhalesbymakingrulesonwhaleprotectionandbynotputtingrubbishintothea.Ithinkpeopleshouldlearnmoreaboutwhales.
SelfCheck