unit 4 exploring plants-using language 课件

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1、Unit4Exploringplants-Usinglanguage课件BeeHumming-birdsButterfliesmothDifficultwordsandexpressionsevolveevolutionattachtobattubeodourgiveout发展；进展；进化发出；分发气味管子演变；进化附上；贴上蝙蝠Whatisthetextabout?Whatdopicturesshowyou?Whatisthechartabout?1Thetextisaboutflowersandtheiranima

2、lpollinators.Thepicturesshowdifferentkindsofanimalpollinatorsandtheirflowers.Thechartlistsanimalpollinatorsandthecharacteristicsoftheflowerstheypollinate.Answerthequestions.1.Whatistheadvantageforanimalsofvisitingflowers?Animalsgetfoodcallednectarfromtheflowers.

3、2.Whydosomeplantsneedanimals?Someplantsneedanimalstopollinatethem.23.Howdoesananimalpollinateaflower?Ananimalpollinatesaflowerbycollectingpollenfromaflowerandpassingitontoanotherflower.4.Whatfeaturesofaflowerareimportantinattractinganimalpollinators?Thefeatureso

4、faflowerthatareimportantinattractinganimalpollinatorsareitscolour,shape,sizeandsmell.5.Whatisnectar?Nectarisasweetliquidproducedbyflowersandcollectedbybees.6.Whatkindsofanimalsaremostflowerspollinatedby?Mostflowersarepollinatedbybees,mothsandbutterflies.Trueorfa

5、lse1.Beesfollowcolouredlinestothenectarinsidetheflower.2.Flowersthatarewhiteorpalecanbeseenbynightpollinators.3.Butterfliesareattractedtosweet-smellingflowers.TTF34.Batspollinateflowersatnight.5.Flowercolourisnotimportanttohummingbirds.6.Allpollinatorsneedtoland

6、onthefloweriftheyaretofindthenectar.TFFFindothernounsinthechartthatmeanthesameas“smell”.Listadjectivesfromthechartthatareusedtodescribedifferentkindsofsmells.Nounsthatmean“smell”:______________.Adjectivesthatdescribesmells:_______________________________________

7、________.odour,perfumedelicate,fragrant,odourless,strong,sweet,musty,fruity41.evolveevolve常用作不及物动词，意为“进化，形成，发展”，常与from搭配使用，意为“从……发展而来”。如：ThepresentBritishpoliticalsystemhasevolvedoverseveralcenturies.英国的现行政治制度是经过几个世纪逐步发展而成的。单词讲解Thedevelopmentalhistoryofsocietyte

8、llsusthatmanhasevolvedfromtheape.社会发展史告诉我们人是从类人猿进化来的。★其名词形式为evolution,意为“进化，演变，发展，渐进”。如：1）.Darwin’stheoryofevolutionhasbeenwidelyaccepted.达尔文的进化论已经被广泛接受。2）.Thefarmers