英语科普知识Word下载.docx
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英语科普知识Word下载.docx
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Whatisafoodchain"
Allfoodchainsaremadeofproducers,consumers,anddecomposers.
Energymovesupfromplantstoanimalsinafoodchain.
Scienceknowledge
(1)food
1.Plantsuseaprocesscalledphotosynthesis,usingwater,carbondioxideandenergyfromthesuntomakesugarsandgiveoffoxygen.
2.livingthingseatotherlivingthings.Theygetenergyfromthem.
(2)foodchain
1.Foodchainshowsthepathenergymovesbetweenlivingthingsinanecosystem.
2.Theonebeeneateniscalledpreyandtheonewhoeatsthepreyiscalledpredator.Ananimalcanbothbeapreyandapredator.
1.Foodchainn.食物链
2.Producern.生产者makefoodthemselves
3.Photosynthesisn.光合作用
4.Consumern.消费者eatorgetfoodfromtheproducer.
5.Decomposern.分解者
6.Carnivoren.食肉动物Herbivoren.食草动物
Omnivoren.杂食动物
7.Preyn.猎物predatorn.猎食者
8.Raccoonn.浣熊
Unit2Animals
WhatareSomekindsofAnimals"
Animalscanbeputintogroups.
Theyaredifferentinordertosurvive.
Groupsofanimalshavesimiliarbodyparts.
Differentfeatures
1.Mammalshashairorfurcoveringtheirskin.
Mostmothersgivebirthtoliveyouth.
Theyoungdrinkmilkfromtheirmother.
2.Birdshavefeathers,wingsandbeak.Notallbirdscanfly.
Theyusebeakstogetfoodandbuildnests.
Theylayeggstohaveyoung.
3.Repitleshavedryskinwithscales.
Mostmotherslayeggsonland.
4.Mostyoungamphibianliveinwater.
Whileadultsliveonland.
Theylaytheireggsinwater.
5.Fishliveinwaterandusetheirgillstobreatheinoxygen.
Finshelpthemtosteer,swimandbalance.
Mostofthemhavescales.
6.Insectshavesixlegsandthreeparts.
Theyhaveahardbodycoveringandhavenobones.
1.Differentkindsofanimals:
Mammaln.哺乳动物reptilen.爬行动物
Amphibiann.两栖动物insectn.昆虫
2.Featuren.特点
3.Scalen.鳞片
4.Inorderto=soasto为了
5.Survivev.生存
6.Similiaradj.相近
7.Helpsb.(to)dosth.帮助某人做某事
WhataresomeAnimallifecycles"
Allanimalsreproducetomakenewanimals.
Younganimalsmayormaynotlookliketheirparents.
Animalshavealifecycle.
(1)animal’slifecycle
1.Manyanimalsbeginbyhatchingfromaegg.
2.Metamorphosischangewhentheygrow.
(e.g.Egg--youngtadpole--growingtadpole--frog)
(e.g.Egg--larva--pupa--adultbutterfly)
(2)aboutbutterfly
1.Egg:
Afemalebutterflylaysatinyegg.
2.Larva:
alarvahatchesfromtheegg.Iteatsandgrowsquickly.
3.Pupa:
Itstopseatingandmakesahardcovering(pupa).
4.Butterfly:
Andadultfliesout.Itcanhaveitsyoung.
(3)aboutpolarbears
1.Newborn:
theyareintheden,anddrinkmilkfromthemother.
2.Growingcub:
theyareoutsideexploring.
3.Youngpolarbear:
theyarelearningtohuntandswim.
4.Adultpolarbear:
theyliveonitsownandhaveyoung.
1.Lifecyclen.生命周期
2.Metamorphosisn.变形
3.Tadpolen.蝌蚪
4.Larvan.幼虫
5.Pupan.蛹
6.Breathev.呼吸
Breathn.呼吸
7.Huntv.捕猎
8.Liveonitsown自己生存
9.Coveringn.覆盖物
10.Denn.窝
Unit3plants
Whataresomeplantparts"
Plantshavepartsthathelpthemgrow.
ThePhysicalcharacteristicofplantshelpthemmeettheirneeds.
Thepartsofplantsandtheiruse.
1.Leaveuseair,waterandsunlighttomakefood
2.Stemcarrywaterandnutrient(nutrition)fromtheroots.
Andgivewatertoleavesandotherpartoftheplant.
3.Therootsgrowintosoilandholdtheplant.
Theytakewaterandnutrientsfromthesoil.
4.Theflowerpartincludespollen,petalsandseeds.
Theflowermakeseedsbypollen(apowder).
Mostofthemusepollenfromotherflowers.
Petalsattractinsectstohelpthemmovepollen.
1.Physicalcharacteristicn.体型特征
2.meettheirneedv.满足他们的需求
3.Sunlightn.
4.Stemn.茎
5.Flowern.花朵
6.Pollenn.花粉
7.Petaln.花瓣
8.Seedn.种子
9.Powdern.粉末
10.Attractv.吸引
Whataresomeplantlifecycles"
Allplantshavelifecycles.
Theybeginwithseed,andthengrowtoaplant.
Plantsflowertomakeseeds.
(1)theknowledgeaboutplants
1.Differentplantsgrowindifferenttime.
2.Sometreescanlivehundredsofyears.
3.Someplantsdon’thaveflowers
(e.g.pinetree,theseedsareinitscone).
4.Thefruitgrowsaroundtheseedtoprotectthem.
(2)howtheseedgrow
1.Thetinyplantisinsideaseed.
2.Theseedgerminates.Itbecomeaseedling.
3.Thestemgrowupwardtowardslight.
4.Theplantgrowmorerootandleaves.
5.Theplantgrowflowers.Itmakesseeds.
1.Germinatev.发芽
2.Seedlingn.幼苗
3.Conen.松果
4.Flowern.花,花朵
v.开花
5.Upwardadj.向上的
adv.向上地
6.Hundredsof成百上千
Thousandsof成千上万
7.Lifecyclen.生命周期
Unit4Environments
Howdoenvironmentschangeovertime"
Environmentchangeovertimeduetomanyinfluences.
Naturalevent(fire...)canharmtheenvironments.
Weharmtheenvironmentbypollutingthem.
Smallchangescanchangetheentireenvironment.
(1)Howcanfirechangetheenvironment"
1.Firesorsomeotherthingcanchangetheenvironment.
2.Itburnsthetreeandkillstheanimals.
3.Thechangewon’tlastforever.
Animalsreturnandplantsgrow.
(2)Howdoplants(kudzu)oranimalchangeenvironment.
1.Thekudzugrowveryfast,andleavingnosunshineforotherplants.
2.Plantsarounditdiebecausetheydon’thavesunshine.
3.Beaversbuilddam,whichblocksthedam.
4.Itmakeapond.
(3)whatpeopledoeffecttheenvironment
1.Weneedresourcestomeetourneeds.
2.Wecanhelptheenvironmentby
1.Plantmoretrees.
2.Reducetrashandkeepitclean.
3.Weharmtheenvironmentby
1.Cutdowntrees.
2.Pollutionandtrashharmtheenvironment.
1.Changesthentirely=changetheentire+sth.
彻底改变某物
2.Dueto由于,因为
3.Kudzun.野
4.Leavenosth.Forsb.用尽某物不留给某人
5.Damn.堤坝
Beavern.河狸
6.Resourcesn.资源
7.Influencen.影响
8.Naturaleventn.自然事件
Howdoenvironmentalchangesaffectlivingthings"
Naturaleventssuchasfire,floodanddroughtcanaffectlivingthings.
Peoplecandothingtohelportoharmthelivingthings.
(1).Howcannaturaleventsaffecttheenvironment
1.Lighteningandothereventscausefiretoburn.
Firedestroyanimal’shabitats.Pineconesneedfiretoopen.
Butitalsoclearspacefornewplantstogrow.
2.Erosioncanmovesandandrocks.
Habitatsforusandanimalsdisappear.
Toolessortoomuchwatercancausedroughtorflood.
(2).Howcananimalsorplantsaffecttheenvironment"
1.Bybuildingshelters.
2.Someplantstakeoverallthespaceandmakeitharderforotherplantstolive.
3.Someanimalscausediseases.
(3)Howdoweaffecttheenvironment"
1.Weuseresourcesandcausepollution.
2.Webuilddamstocontrolthewater.
3.Wealsohelptheminmanyways.
1.Floodn.洪水
2.Droughtn.干旱
3.Erosionn.侵蚀
4.Sheltern.避难所
5.Takeover接收
6.Causesthtohappen导致某事发生
7.Ina...Way以一种……的方式
inaspecialway
Unit5
Howarelivingthingsadaptedtotheirenvironment"
Plantsandanimalshaveadaptionforlivingindifferentenvironments.
Adoptionshelplivingthingssurvive.
Scienceknowledge
(1)howdodifferentkindsofanimalsadaptandprotect.
1.Camelsliveinplacesthataredryandsandy.
Theygotlongeyelashestokeepsandoutoftheireyes.
2.Penguinshaveathicklayeroffattokeepthemwarm.
3.Skunksreleaseastrongscent.
4.Theleafinsectlookslikealeaf
(2)howdoplantsprotectandadapt"
1.Rainforestplantshavelargeleavestogetsunlight.
2.Cactihaveathickstemtostorewater.
3.Someplantshavethornstopreventanimalsfromeating.
4.Someplantstastebad.
1.Alayerof一层
2.Adaptv.适应
Adaption=somethingthathelpalivingthingtosurvive.
3.Thornn.尖刺
4.Scentn.气味
5.Eyelashesn.眼睫毛
6.Daffodiln.水仙花
7.Preventn.阻止
Whatareecosystems"
Anecosystemismadeofplants,animals,water,soilandotherthings.
LivingandNon-livingthingsdependoneachotherinanecosystem.
Habitatsarewhereapopulationlives.
Theecosystemonlandandwater
1.Plantsandanimalshelpeachotherintheecosystem.(detailsinU1)
2.Manyanimalsandplantsliveinaecosystem.
3.Therearefoodchainsineveryecosystems.
Animalseatplantsoranimals.
4.Theunderwaterecosystemaremadebytinyanimalscalledcorals.
1.Communityn.群落,社区
2.Habitatn.栖息地inhabitantn.居民,住户
Habitablen.适宜居住的
3.Ecosystemn.生态系统
4.Coralsn.珊瑚
5.Populationn.种群popularn.受欢迎的
6.Organismn.微生物
7.Ottern.水獭,水獭皮
8.Tropicaln.热带tropicalstorm
9.Anemonesn.海葵,银莲花
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