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1、Unit 4Wordsrot nectar bat evolve attach moth waspbeetletypicalvt. & vi. 腐烂腐烂; 腐败腐败 n. 花蜜花蜜; 甘露甘露n. 蝙蝠蝙蝠vt. & vi. 发展发展; 进展进展; 进化进化vt. 缚上缚上; 寄上寄上n. 蛾蛾n. 黄蜂黄蜂n. 甲虫甲虫adj. 典型的典型的; 有代表性的有代表性的petal tube delicatefragrant daisyodourodourlessdullmustyfruity n. 花瓣花瓣n. 管管; 管子管子adj. 精巧的精巧的; 脆弱的脆弱的adj. 芬芳的芬芳的; 香的
2、香的n. 雏菊雏菊n. 气味气味; 香气香气; 臭味臭味adj. 没有气味的没有气味的; 无臭的无臭的adj. 不鲜明的不鲜明的; 阴暗的阴暗的adj. 发的发的; 有霉味的有霉味的adj. 果味的果味的; 有葡萄味的有葡萄味的Expressionsattach to give out帖上帖上; 附上附上发出发出 (气味气味,热等热等) ; 分发分发1.How would you describe each plant? What do you think is unusual about each plant?2. One of the pictures shows pitcher plan
3、ts and another shows “living stones”. Which picture shows which plant? The name of the plant in the other picture is Rafflesia. In groups, look carefully at the photos of the plants and answer the questions.living stoneRafflesiapitcher plantsNow listen to Mark, Gordon and Andrea telling their class
4、about these plants. Which student talks about which plant?Plant ABCStudents nameName of the plantMarkPitcher plantLiving stones or LithopsGordonRafflesia arnoldiiAndrea3 Listen again and complete the table with the correct information. You might need to listen several times.MarkGordon AndreaName of
5、the plantReason for its namepitcherplantliving stonesRafflesiaarnoldiiIts shaped like a pitcher.They look like stones.MarkGordonAndreaIts smellIts shapeIts sizelike a pitcherroundedlike rottingmeatone meter widesmallround with large thick petalsMarkGordonAndreaHow it gets its foodWhere it livesfrom
6、insects that fall into the pitcherfrom thesoilHot dryplaces inSouth Africa,NamibiaFrom AnotherplantJungles in parts of IndonesiaMarkGordonAndreaWhat its leaves are likeHow common it isHow it is pollinatedshape likepitcherround like stonesdoesnt have leavesit is becoming rareInsects that eat dead ani
7、malsUNUSUAL PLANTTH: Today Mark, Gordon and Andrea are going to tell us about some unusual plants. Mark, do you want to go first?M: Sure. Today, I want to talk about an insect-eating plant called a pitcher plant. Listening textListen to Mark (M), Gordon (G) and Andrea (A) telling their class and the
8、ir teacher (TH) about some plants.Heres a photo of it. Look at this part here. Its shaped like a pitcher. Its actually a leaf even though it looks like a flower. Its really clever-the insects are attracted by the sweet smell coming from what they think is a flower. But its a trap. Once an insect goe
9、s down into the pitcher, it cant get out as there are small hard hairs pointing downwards that prevent it from escaping. In the end, the insect falls down into a pool of liquid at the bottom of the pitcher and gets digested by the plant.S1:S1: Thatsamazing!hatsamazing!S2:S2: Whatfantasticplants!hatf
10、antasticplants!TH:TH: Gordon.Gordon.G:G: ThesearetheplantsImgoingThesearetheplantsImgoingtotalkabout.Theyreoftentotalkabout.Theyreoftencalled“livingstones”,butcalled“livingstones”,buteventhoughtheydolookabiteventhoughtheydolookabitlikestones,theyareinfactlikestones,theyareinfactplants.plants.S3:S3:
11、Wow!Wow!S4:S4: Howinterestingowinteresting!G:G: TheirscientificnameisTheirscientificnameisLithopsandtheycomefromLithopsandtheycomefromSouthAfricSouthAfricaandNambia.TheandNambia.Thebodyofalithopsisactuallyabodyofalithopsisactuallyapairofleavesthathavebecomepairofleavesthathavebecomeroundedlikeastone
12、.Thisisroundedlikeastone.Thisisbecausethisplantlivesinbecausethisplantlivesinveryvery hotanddryplaces.Whentheleaveshotanddryplaces.Whentheleavesareshapedlikethis,areshapedlikethis,notmuchmuchwaterislostfromtheplant.waterislostfromtheplant.AnotherinterestingthingaboutAnotherinterestingthingaboutthese
13、strangeplantsisthatthesestrangeplantsisthattheyrethesamecoloutheyrethesamecolourandandappearanceofthesoilandstonesappearanceofthesoilandstonesaroundit.Thismakesthemlessaroundit.Thismakesthemlessobvioustoanimallookingobvioustoanimallookingforfood.orfood.TH:TH: Thanks,Gordon.Andrea.Thanks,Gordon.Andre
14、a.A:A: ImgoingtotellyouaboutImgoingtotellyouaboutRafflesiaarnoldii,aplantthatRafflesiaarnoldii,aplantthathasafloweraboutonemetrehasafloweraboutonemetrewide.Infact,itsthelargestwide.Infact,itsthelargestflowerintheworld.Rafflesiaflowerintheworld.Rafflesiaarnoldiidoesnthaveanyarnoldiidoesnthaveanyleave
15、s,stemsorroots.Itleaves,stemsorroots.Itdoesntneedthemasitsadoesntneedthemasitsaparasite.Itgetsparasite.Itgetsthisfoodbyfoodbylivingonanotherplant.livingonanotherplant.YouYou mightthinkthatthismightthinkthatthisflowershouldsmellwonderfulflowershouldsmellwonderfulbutitactuallylooksandbutitactuallylook
16、sandsmellslikerottingmeat!smellslikerottingmeat!S2:S2: Oh,yuck!Oh,yuck!S1:S1: Thatsdisgusting!Thatsdisgusting!S3:S3: IthinkitsfantasIthinkitsfantastic!ic!A:A: Metoo.Anyway,itaMetoo.Anyway,itattractsactsinsectsthateatdeadanimalsinsectsthateatdeadanimalsbutinsteadofgettingafeed,butinsteadofgettingafee
17、d,theinsectspickupitspollentheinsectspickupitspollenandspreadittootherandspreadittootherRafflesias,Rafflesias,RafflesiaarnoldiiafflesiaarnoldiigrowsinthejunglesingrowsinthejunglesinIndonesiabutastheforestsareIndonesiabutastheforestsarebeingbeingcutdown,itsbecomingutdown,itsbecomingveryrare.veryrare.
18、TH: Thanks Andrea and thanks everyone. Those plants are certainly fascinating.BeeHumming-birdsButterflies moth ANSWER THE QUESTIONS.1.What is the advantage for animals of visiting flowers?2. Why do some plants need animals? Animals get food called nectar from the flowers.Some plants need animals to
19、pollinate them.An animal pollinates a flower by collecting pollen from a flower and passing it onto another flower.3. How does an animal pollinate a flower?4. What features of a flower are important in attracting animal pollinators? The features of a flower that are important in attracting animal po
20、llinators are its colour, shape, sizeand smell.5. What is nectar?6. What kinds of animals are most flowers pollinated by? Nectar is a sweet liquid produced byflowers and collected by bees.Most flowers are pollinated by bees, moths and butterflies.TRUE OR FALSE1. Bees follow coloured lines to the nec
21、tar inside the flower. 2. Flowers that are white or pale can be seen by night pollinators. 3. Butterflies are attracted to sweet-smelling flowers. TTF4. Bats pollinate flowers at night. 5. Flower colour is not important to hummingbirds. 6. All pollinators need to land on the flower if they are to fi
22、nd the nectar. TFFFIND OTHER NOUNS IN THE CHART THAT MEAN THE SEAM AS “SMELL”. LIST ADJECTIVES FROM THE CHART THAT ARE USED TO DESCRIBE DIFFERENT KINDS OF SMELLS.Nouns that mean “smell”: _ _.Adjectives that describe smells: _.odour, perfumedelicate, fragrant, odourless, strong, sweet, musty, fruityABIn groups, look at the pictures and decide what kind of pollinators these plants might have. Give your reasons for your answers.CDEFGH
