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General Instructions :1. The question paper consists of 2 sections–Section A (having 27 questions) and

Section B (having 12 questions). You are to attempt both the sections.2. All questions are compulsory.3. There is no overall choice. However, internal choices have been provided in

3 questions of 2/3 marks category and all the 6 questions of 5 marks each.4. All questions of Section A and Section B are to be attempted separately.5. Questions 1 to 4 in Section A and Questions 28 & 29 in Section B are multiple choice

type questions and carry one mark each.6. Questions 5 to 10 in Section A and Questions 30 & 32 in Section B are very short

answer type question and carry 1 mark each.7. Questions 11-16 in Section A and question 33 to 35 are short answer type questions

and carry 2 marks each.8. Question 17 to 23 in Section A, and Question 36 and 37 in Section B, are also short

answer type questions and carry 3 marks each.9. Question 24 to 27 in Section A, and Question 38 and 39 in Section B, are long answer

type questions and carry 5 marks each.

lkekU; funsZ'k %1- bl iz'u i=k nks [kaM gSaµ[k.M ^v* (ftlesa 27 iz'u gSa) vkSj [k.M ^c* (ftlesaa 12

iz'u gSa)A vki dks nksuksaa gh [k.Mksa osQ iz'u djus gSaA2-lHkh iz'u vfuok;Z gSaA3-lkefxzd fodYi ugha fn;k x;k gSA rFkkfi 5 vad dh Js.kh osQ lHkh N% iz'uksa rFkk 2@3

vad dh Js.kh osQ 3 iz'ukasa esaa vkarfjd fodYi iznku fd, x, gSaA4-[kaM ^v* osQ lHkh iz'u vkSj [kaM ^c* osQ lHkh iz'u vyx&vyx djus gSaA5-[kaM ^v* esa iz-la- 1 ls 4 rFkk [kaM ^c* esa iz-la- 28 vkSj 29 cgq&oSdfYid iz'u gSa

,oa buesa ls izR;sd dk 1 vad gSA6-[kaM ^v* esa iz-la- 5 ls 10 rFkk [kaM ^c* esa iz-la- 30 ls 32 vfr y?kwÙkjkRed iz'u gSa

,oa buesa ls izR;sd dk 1 vad dk gSA7-[kaM ^v* esa iz-la- 11 ls 16 rFkk [kaM ^c* esa iz-la- 33 vkSj 35 y?kwÙkjkRed iz'u gSa

,oa buesa ls izR;sd iz'u 2 vadksa dk gSA8-[kaM ^v* esa iz-la- 17 ls 23 rFkk [kaM ^c* esa iz-la- 36 vkSj 37 Hkh y?kqÙkjkRed iz'u

gSa ,oa buesa ls izR;sd iz'u 3 vadksa dk gSA9-[kaM v* esa iz-la- 24 ls 27 rFkk [kaM ^c* esa iz-la- 38 vkSj 39 nh?kZ mÙkjkRed iz'u gSa

,oa buesa ls izR;sd 5 vadksa dk gSA

SCIENCE & TECHNOLOGY(Summative Assessment - II)

Time : 3 Hrs. Maximum Marks : 90

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SeCTIOn-A([kaM&v)

1. If four different colours of light fall parallel to the principal axis of a convex lens, the number of points of convergence on the axis will be - (a) 1 (b) 2 (c) 3 (d) 4 ;fn çdk'k ds pkj fofHkUu jax mÙky ysal ds eq[; v{kj ij lekukUrjfxjrsgSarksv{kijvfHklkjhfcanqvksadhla[;kgksxh%& (a) 1 (b) 2 (c) 3 (d)4

2. Given sound is ultrasonic if it's frequency is (a) 21,000Hz (b) 22KHz (c) 19 Hz (d) both a and b dksbZèofuijkJO;rcgksrhgStcmldhvko`fÙkgksrhgS%&(a) 21,000 Hz (b) 22KHz (c) 19 Hz (d)nksuksaa rFkkb

3. Which of the following metal occurs in native state? (a) Platinum (b) Sodium (c) Aluminium (d) Potassium fuEufyf[kresalsdkSulh/krqviusekSfyd:iesaik;htkrhgS\ (a) IySfVue (b)lksfM;e (c) vY;wehfu;e (d)iksVkf'k;e

4. In olden days, the earthen pot was used for (a) Storing water (b) Cooling water (c) purifying water (d) Storing, cooling and purifying water. iqjkusle;esafeV~Vhds?kM+sdkmi;ksx (a) ikuhdsHkaMkj.kdsfy, (b) ikuhdksBaMkdjusdsfy, (c) ikuhds'qf¼dj.kdsfy, (d) ikuhdsHkaMkj.k]BaMkdjusvkSj'kq¼hdj.kdsfy, fd;ktkrkgSA

1

1

1

1

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5. State the factor that determines the colour of a star? ogdkjdfyf[k,tksrkjsdkjaxKkrdjrkgSA

6. State one observation from everyday life that shows speed of sound is less than the speed of light in air. nSfudthouls,dizs{k.knhft,tks;giznf'kZrdjrkgSfdèofudhpkyçdk'kdhpkylsdegksrhgSA

7. Why do different phases of moon occur? pUnzekdhfofHkUuizkoLFkk,aD;ksa?kVrhgSa\

8. Gold ornaments do not get tarnished. Why? lksuslscusvkHkw"k.k/wfeyD;ksaughagksrsgSa\

9. Write the name and the composition of an alloy used for making aircraft bodies. foeku cukus ds fy, mi;ksx gksus okyh feJ /krq dk uke ,oa la;kstufyf[k,A

10. Name two chemicals used for purifying water. ikuhds'kqf¼dj.kdsfy,mi;ksxgksusokysnksjlk;uksadsukefyf[k,A

11. (a) What are pointers? (b) Name the constellations in which the following stars are found (i) Betal geuse (ii) Pole star (a)ikSbaVj(ladsrd)D;kgksrsgSa\ (b)murkjkeaMyksadsukefyf[k,ftuesafuEurkjsik,tkrsgSa (i)fcVyxht (ii)/qzorkjk

12. (a) Under what condition do the cones get activated? (b) No image is formed at the junction of optic nerve and the retina. Why? (c) How is self adjustment of the size of the pupil helpful? (a)fdlifjfLFkfresa'kadqdksf'kdk,afØ;k'khygkstkrhgSa\(b)izdkf'kd raf=kdk rFkk jsfVuk ds la;kstu ij dksbZ izfrfcac D;kas ugha curkgS\ (c)ifjrkfjdkdslkbtdkvkReleatufdlizdkjlgk;dgksrkgS\

1

1

1+½+½=2

1

1

1

1

½+1+½=2

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13. Arrange the following media in the order of increasing optically denser nature. Given the refractive index of air, glass, kerosene and diamond are 1, 1.5, 1.44 and 2.42 respectively. fuEuekè;eksadksizdk'kh;l?kurkdsc<+rsØeesaO;ofLFkrdhft,Aok;q]dkap]fdjkslhurFkkghjkdsviorZukadØe'k%gSa1]1-5]1-44rFkk2-42-

14. Differentiate between metals and non-metals on the basis of following properties : (i) Tensile strength (ii) Electrical conductivity fuEufyf[krxq.kksadsvkèkkjij/krqvkSjv/krqesafoHksnudhft,%(i)ruu&lkeF;Z (ii)fo|qrlqpkyu

15. Give reason for the following : (i) Silver is a good conductor of electricity but it is not commonly usedforelectricalfittings. (ii) Nitrogen is used in the form of fertilizers. fuEufyf[krdsdkj.kcrkb,% (i)pkanh,dvPNhfo|qrlqpkydgSijarqoglkekU;r%fo|qrfiQfVaxds fy,mi;ksxughagksrhgSA (ii)ukbVªkstumoZjdksads:iesami;ksxgksrkgSA

16. How is poly ethene different from backelite? (Give 2 points) ikWfyFkhucsdsykbVlsfdlizdkjfHkUugS\(nksfHkUurk,anhft,)

17. Astudentfocussedtheimageofacandleflameonawhitescreenbyplacingtheflameatvariousdistancesfromaconvexlens.Henotedhisobservationsin the following table.

Observation no. Distanceoftheflamefrom the lens (cm)

Distance of the screen from the lens (cm)

(i)(ii)(iii)(iv)(v)

6040302412

2024304070

2

2

2

2

3

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On the basis of the above table answer the following questions.

(a) What is the focal length of the convex lens?

(b) Which set of observations is incorrect and why?

,dNk=kus,dtyrhgqbZeksecÙkhdksmÙkyysallsfofHkUunwfj;ksaijj[krsgq,mldhTokykdsizfrfcacdks'osrinsZijiQksdlfd;kAmlusviusizs{k.kfuEulkj.khesauksVfd,A

izs{k.kla- Tokykdhysallsnwjh(cm)

insZdhysallsnwjh(cm)

(i)(ii)(iii)(iv)(v)

6040302412

2024304070

Åij dh lkj.kh ds vk/kj ij fuEu iz'uksa ds mÙkj fyf[k, %&(a)mÙkyysaldhiQksdlnwjhD;kgS\ (b)izs{k.kksadkdkSu&lkleqPp;xyrgSrFkkD;ksa\

18. (a) Write any one effect produced by Noise pollution on Human

health.

(b) Suggest two measures to limit noise pollution.

(a)ekuoLokLF;ij'kksjiznw"k.k}kjkmRiUudksbZ,dizHkkofyf[k,A(b)'kksjiznw"k.kdksdedjusdsfy,nkslq>konhft,A

19. (a) Name the part of Human ear that transfers the electric signals to

the brain.

(b) Calculate thedistanceatwhich the reflecting surfacemustbekept

away from the source of sound to hear the echo produced.

(a)ekuodkudsmlHkkxdkukefyf[k,tksfo|qrflXuyksadksefLr"d rdLFkkukarfjrdjrkgSA (b)fdlh èofu L=kksr ls izfrèofu lquus ds fy, ijkorZu i`"B dh nwjh ifjdfyrdhft,A

1+2

3

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20. (a) The frequency of a vibrating body is 10 Hz. What is its time period!

(b) Explain How do Humans produce sound.

(a)fdlh oaQik;eku oLrq dh vko`fÙk 10 Hz gSA bldk vkorZ dky D;kgS\ (b)ekuoèofufdlizdkjmRiUudjrsgSa\Li"Vdhft,A

21. (a) On which two planets greenhouse effect is more?

(b) When does a comet become visible?

(c) Why do shooting stars exist for a short duration only?

(a)fdunksxzgksaijxzhugkmlizHkkovf/dgksrkgS\ (b)/wedsrqdcfn[kkbZnsrkgS\ (c)mYdk,a('kwfVaxLVkj)cgqrdele;dsfy,D;ksajgrhgSa\

OR (vFkok)

(a) What are geostationary satellities?

(b) State its one application.

(c) What is their distance from earth as compound to moon?

(d) How much time does this satellite take to complete one revolution

around the earth.

(a)ft;ksLVs'kujhmixzgD;kgksrsgSa\ (b)bldk,dvuqiz;ksxfyf[k,A (c)pUnzekdhrqyukesabldhi`FohlsnwjhfdruhgS\ (d);gmixzgi`FohdhifjØekfdrusle;esadjrkgS\

22. (a) Why Synthetic polymers are called inert?

(b) How is plastic waste harmful to stray cows and other animals?

(c) Plastics should not be burnt. Give reason.

(a)la'ysf"krcgqydfuf"Ø;D;ksagksrsgSa\ (b)IykfLVd vif'k"V xk;ks a ,oa nwljs tkuojks a ds fy, fdl izdkj gkfudkjdgSa\ (c)IykfLVdkstyk;kughatkukpkfg,Abldkdkj.kcrkb,A

1+2

3

1+1+1=3

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23. Ram went to his village after five years and was shocked to see the condition of water bodies that were once the lifeline of his village. Almost all water bodies were dumped with domestic wastes and were stinking. Ram went to village sarpench and discussed the matter with him. The Sarpanch set up a committee to look after cleanliness of water bodies. He also made Ram the head of this committee so that he could spread awareness amongst villagers about cleanliness. (a) What are the major causes of water pollution other than mentioned in paragraph? (any two causes) (b) Mention two values displayed by Ram. (c) Ram tried to create awareness amongst the village people about cleanliness. Suggest two methods which Ram could follow for doing so. jketcik¡po"kZdscknviusxk¡ox;krksogk¡dstyk'k;ksadhgkyrns[kdjmlscgqrnq[kgqvkAogtyk'k;tksdHkhxk¡odhthoujs[kkgqvkdjrsFks]vktog?kjsywdpjslsHkjsFksvkSjmlesalscncwvkjghFkhAjkexzkeljiapdsiklx;kvkSjmUgsablckrlsvoxrdjk;kAljiapustyk'k;ksadhlkiQ&liQkbZdsfy,,dlfefrcukbZftldkvè;{kjkedkscuk;krkfdogxzkeokfl;ksaesaliQkbZdsfy,tkx:drkiSQykldsA (a)ty&iznw"k.kdsnks,slsdkj.kcrkb,tksmijksDrugksaA(b)jke}kjkn'kkZ,x,nksuSfrdewY;fy[ksaA (c)jkeusxkaodsyksxksaesaLoPNrkdsckjsesatkx:drkykusdkiz;klfd;kA ,slsdjusdsfy,fdUghanksfofèk;ksadklq>konhft,tksjke}kjkviukbZ tkldrhgSaA

24. (a) State the principle of cinematography. (b) What enables us to see the distant as well as the nearby objects with the same clarity. (c) Differentate between a myopic eye from a hypermetropic eye on the basis of (i) Size of eyeball (ii) focal length of eye lens. (d) How is cataract cured?

½+½+½+½+½+½=3

1+1 +1+1+ 1=5

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(a)flusekVksxzkiQhdkfl¼karfyf[k,A (b)ge nwjdh rFkk fudVdh oLrqvksa dks ,dlekulqLi"Vrk ls fdl izdkjns[kldrsgSa\ (c)ek;ksfid us=k (fudV&n`f"V) gkbijeSVªksfid us=k (nh?kZ n`f"V) esa fuEu dsvkèkkjijfoHksnudhft,%& (i)us=kxksyddklkbt (ii)us=kysaldhiQksdlnwjh (d)eksfr;kfcandkmipkjfdlizdkjfd;ktkrkgS\

OR (vFkok)

(a) Enlist any two causes of defects of vision. (b) Name the tactual aid used to help visually challenged persons. (c) How many dot patterns / characters does this tactual aid have? (d) Suggest any three precautions to ensure the health, care and proper functioning of the human eye. (a)n`f"Vnks"kdsnksdkj.kksadhlwphcukb,A (b)n`f"VizHkkforO;fDr;ksadhlgk;rkds fy,Li'kZtU;lgk;rkdkuke fyf[k,A (c)blLi'kZtU;lgk;rkesafdrusMkSViSVuZlgksrsgSa\ (d)ekuo us=k ds lqpk: :i ls dk;Z djus] è;ku j[kus rFkk LokLF; lqfuf'prdjusdsfy,rhulkoèkkfu;ksadklq>konhft,A

25. (a) The light of danger signals is red. Give reason. (b) Why do different components of white light deviate through different angles when passing through a triangular glass prism. (c) A ray of light falls at an angle of 550 with the normal on one face of a rectangular glass slab. After refraction it strikes the opposite face of the slab, before emerging out into the air it makes an angle of 400 with the normal. Draw a labelled diagram to show the path of this ray. (a)[krjsdsladsrdkizdk'kykyjaxdkgksrkgSAdkj.kfyf[k,A(b)'osr izdk'kds fofHkUu ?kVd f=kHkqtkdkjdk¡pds izTe ls xqtjus ij vyx&vyxdks.kksaijD;ksa>qdrsgSa\

2+1+2=5

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(c)vk;rkdkjdk¡pdsLyScds,diQydijvfHkyEcdslkFk550dks.k ijvkifrrfdj.kviorZudsi'pkrLyScdsmYVslkbMdsiQydij ok;qesackgjfudyuslsigysvfHkyEcdslkFk400dkdks.kcukrhgSA blfdj.kdkiFkn'kkZusdsfy,ukekafdrvkjs[k[khafp,A

OR (vFkok)

(a) If a fish looks at a bird in the sky will the apparent position be

higher or lower than the real position.

(b) (i) Why do we not percieve the real depth of a lake.

(ii) Explain with the help of a diagram.

(c) Where do watch makers place the object with respect to the lens

and why?

(a);fndksbZ eNyh fdlh i{kh dks vkdk'k esa ns[krh gS rks D;k mldh vkHkklhfLFkfrokLrfodfLFkfrdhvis{kkÅijgksxhvFkokuhps\(b)ge fdlh >hy dh okLrfod xgjkbZ D;ksa ugha ekywe dj ldrs gSa\ vkjs[kA (c)ysaldslkis{k?kM+hlktoLrqdksdgkaj[krkgSrFkkD;ksa\

Alternative question for visually challenged students in lieu of

Q. No. 25. (b)(ii), (c)

ç-la- 25 (b) (ii), (c) ds LFkku ij n`f"V jfgr fo|kfFkZ;ksa ds fy, oSdfYid iz'uA (b) (ii) Will the depth of the lake appear to remain same if the incident

angle from which it is viewed is 00.

;fnns[kstkusokykvkirudks.k00 gksrksD;k>hydhvkHkklhxgjkbZ mruhghjgsxh\ (c) A ray of light falls at an angle of 550 with the normal on one face

of a rectangular glass slab, after refraction it strikes the opposite

face of the slab before emerging out into air it makes an angle of 400

with the normal.

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What value would you assign to the

(i) angle of refraction and

(ii) Angle of emergence. vk;rkdkjdk¡pdsLyScds,diQydijvfHkyEcdslkFk550dks.k ijvkifrrfdj.kviorZudsi'pkr~LyScdsmYVslkbMdsiQydij ok;q esa ckgj fudyus ls igys vfHkyEc ds lkFk 400 dk dks.k cukrhgSA (i)viorZudks.krFkk (ii)fuxZrdks.kdk ekuD;kgksxk\

26. (a) Complete and balance the following equations : (i) Mg + H2O heat¾¾® ? + ? (ii) Zn + HCl ¾¾® ? + ? (b) An element 'X' on reaction with a dilute acid liberates a colourless gas which burns with a pop sound (i) Name the gas produced. (ii) Substance formed by burning 'X' in air changes the colour of litums solution. What will be the colour change. (iii) Will element 'X' conduct electricity? Give reason for your answer.(a)fuEufyf[krlehdj.kksadksiw.kZ,oalarqfyrdhft,% (i) Mg + H2O heat¾¾® ? + ? (ii) Zn + HCl ¾¾® ? + ? (b),d rRo 'X' ruq vEy ds lkFk vfHkfØ;k djus ij ,d jaxghu xSl cukrkgSA;gxSl,dèofudslkFktyrhgSA (i)mRiUugqbZxSldkukecrkb,A (ii)rRo 'X' dks ok;q esa tykus ij ,d inkFkZ curk gS tks fyVel foy;udkjaxcnynsrkgSAfyVeldsjaxesaD;kcnykovk,xk\ (iii)D;krRo'X' fo|qrlapkyudjsxk\viusmÙkjdkdkj.kcrkb,A

OR (vFkok)

(a) A copper wire is dipped in a solution of silver nitrate taken in a beaker. The colour of the solution changes after keeping for sometime.

2+3=5

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(i) What is the change in the colour of the solution? (ii) Write the name of the reaction occuring in the beaker. (iii) Write balanced chemical equation for this reaction. (b) Out of iron and silver container, which one is suitable for storing asolutionofcoppersulphate?Justifyyouranswer. (a),dchdjesafy,x,flYojukbVªsVfoy;uesadkWijdhrkjdksMqck;k x;kA (i)foy;udsjaxesaD;kcnykovk;k\ (ii)chdjesagksusokyhvfHkfØ;kdkukefyf[k,A (iii)blvfHkfØ;kdsfy,jlk;fudlehdj.kfyf[k,A(b)yksgs,oapkanhesalsfdlik=kesadkWijlYisQVfoy;udkHkaMkj.kfd;k tkldrkgS\viusmÙkjdhiqf"Vdhft,A

27. (a) Whyisrayoncalledregeneratedfibre? (b) What is PET? State its one use. (c) It is always advised not to wear Synthetic clothes while working isKitchen.Why? (d) StateanytwoadvantagesofSyntheticfibres. (a)js;kWudksiquZtfurjs'kkD;ksadgrsgSa\ (b)PET D;kgS\bldk,dmi;ksxcrkb,A (c)jlksbZ?kj easdkedjrs le;la'ysf"kr js'ks ls cusdiM+s u iguusdh lykgnhtkrhgSAD;ksa\ (d)la'ysf"krjs'kksadsdksbZnksykHkcrkb,A

OR (vFkok)

(a) Compare Synthetic plastics with natural plastics on the basis of (i) Weight (ii) biodegradability (iii) Tensile Strength (b) Give reasons for the following : (i) Thermosetting plastics can be used only once. (ii)Melamineisusedformakingfabricswhichresistfire.

5

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(a)fuEufyf[kr ds vk/kj ij Ñf=ke vkSj izkÑfrd IykfLVd dh rqyuk dhft,% (i)Hkkj (ii)tSofuEuhdj.kh; (iii)ruu&lkeF;Z (b)fuEufyf[krdsdkj.kcrkb,% (i)FkeksZlSfVaxIykfLVddsoy,dckjghmi;ksxfd;stkldrsgSa\ (ii)esykekbuvfXulgdiM+scukusdsfy,mi;ksxgksrkgSA

SeCTIOn-B([kaM&c)

28. Which of the following is not an advantage of ploughing?

(a) It improves air circulation is soil

(b) It enhance water holding capacity of soil

(c) Ituprootstheneedsfromthefield.

(d) Itprotectsthefieldfrompests.

fuEufyf[kresalsdkSulktqrkbZdsfy,ykHknk;dughagS\(a) ;gfeV~Vhesaok;q&lapkj.kdksmÙkecukrhgSA (b) ;gfeV~Vhdhty&/kj.k{kerkdksc<+krhgSA (c) ;g[ksresals[kj&irokjdkstM+lsm[kkM+rhgSA (d) ;g[ksrdksgkfudkjdthoksalscpkrhgSA

29. Harmone that lowers the blood glucose level in body -

(a) Insulin (b) Thyroxin

(c) Growth harmone (d) Estrogen

'kjhjesajDr'kdZjkdhek=kkdksdedjusokykgkeksZugS(a) balqfyu (b) FkkbjksfDlu

(c) o`f¼gkeksZu (d) ,LVªkstu

30. Write any one purpose of Agriculture other than growing food for

people.

HkkstumRiknudsvfrfjDrÑf"kdk,dvU;mís';fyf[k,A

1

1

1

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31. Name the type of reproduction in which young ones are not genetically identical to the parent. mltuu&fofèkdkukefyf[k,ftlesacPpsvkSjmldsekrk&firkesavuokaf'kdlekurkughagksrhgSA

32. Mention any two features that are seen in boys at puberty? ;kSoukjEHkesayM+dksaesaik,tkusokyhdksbZnksfo'ks"krk,¡fyf[k,A

33. Write two functions of hormones produced by the ovaries. vaMk'k;}kjklzkforgkeksZudsnksdk;Zfyf[k,A

34. Name the type of reproductive pattern exhibited by hen and frog. dqDdVrFkkesa<d}kjkiznf'kZrtuufofèkdsizdkjdsukefyf[k,A

35. One day Eco-club students of a school went for field excursion with their teacher. they saw that farmers were spraying pesticides in the field without taking any precaution. They told the farmers about the harmful effects of pesticides. (i) How is exessive use of pesticides harmful for crops? (ii) Write two values displayed by the eco-club students. ,d fnu fo|ky;dsi;kZoj.k DycdsNk=kviusvè;kiddslkFk {ks=kHkze.kds fy, x,A ogk¡ mUgksaus fdlkuksa dks [ksr esa fcuk fdlh iwokZo/kuds dhVuk'kd fNM+drs gq, ns[kkA Nk=kks a us fdlkuksa dks dhVuk'kd dsvR;kfèkdmi;ksxdsgkfudkjdizHkkoksalsvoxrdjk;kA (i)dhVuk'kdks a dk vR;kf/d mi;ksx iQly ds fy, fdl izdkj gkfudkjdgS\ (ii)i;kZoj.kDycdsNk=kksa}kjkn'kkZ;sx,dksbZnksuSfrdewY;fyf[k,A

36. (a) In what way are fertilizers better than manures? Give one point. (b) It is advisable to grow a crop of soyabean between two successive crops of wheat. Explain why? (a)[kkn dh rqyuk esa moZjd fdl izdkj Js"Brj gSa\ dksbZ ,d dkj.k crkb,A(b)xsgw¡dhnksmÙkjksÙkjiQlyksadschplks;kchudhiQlymxkukmi;qDrekuk tkrkgSAbldkdkj.kfyf[k,A

1

1

2

2

1+1

1+2=3

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37. (a) Name two agencies which are responsible for large scale

storage of food grains.

(b) Why are harvested food grains sun-dried before storing?

(c) What is the machine called 'combine' used for?

(a)[kk|kUu ds cM+s iSekus ij Hk.Mkj.k djus okyh nks laLFkkvksa ds uke crkb,A(b)rktkdkVhxbZiQlydsnkuksadksHk.Mkj.klsiwoZ/wiesaD;ksalq[kk;k tkrkgS\ (c)dEckbuuked;a=kdkmi;ksxfdlfy,fd;ktkrkgS\

OR (vFkok)

(a) What is broadcasting in terms of agriculture?

(b) What are the advantages of transplantation of seedlings? (any two)

(a)[ksrhdslanHkZesa^czkWMdkfLVax*lsD;kvfHkizk;gS\ (b)chtlsmRiUugq,NksVsikS/sdsizR;kjksi.kdsD;kykHkgSa\

38. (a) What is fertilization?

(b) Why does a child has some characteristics of father and some

characteristics of mother?

(c) Write two features that are present in tadpole but absent in adult

frog.

(a)fu"kspuD;kgS\ (b),df'k'kqesadqNy{k.kfirkdsvkSjdqNy{k.kekrkdsD;ksagksrsgSa\(c)nksy{k.kcrkb,tksfdVSMiksy(yk[kk)esaik,tkrsgSaijUrqO;Ldesa<+d esaughaik,tkrsgSaA

OR (vFkok)

(a) How does zygote, develop into an embryo?

(b) Draw the labelled diagram of female reproductive system.

(a);qXeutdSlsHkw.kesafodflrgksrkgS\ (b)ekuoesaeknktuukaxdkukeif=krfp=kcukbZ,A

1+1+1=3

1+2=3

1+2+2=5

2+3=5

CBSETO

DAY.C

OM

[105]

AlternativequestionforvisuallychallengedstudentsinlieuofQ.no.38. ç-la- 38 ds LFkku ij n`f"V jfgr fo|kfFkZ;ksa ds fy, oSdfYid iz'uA (a) How does zygote, develop into an embryo? (b) Write the functions of any three parts of female reproductive system. (a);qXeutdSlsHkw.kesafodflrgksrkgS\ (b)eknktuukaxdsfdUgharhuHkkxksadsdk;Zfyf[k,A

39. (a) What happens when the egg released by the ovary is not fertilized? (b) How father is responsible for determining the sex of the child? Explain. (a)vaMk'k;}kjkmRiUufd,x,vaMk.kqdkfu"kspuugksusdhfLFkfresaD;k gksrkgS\ (b)f'k'kq ds fyax fu/kZj.k ds fy, firk fdl izdkj mÙkjnk;h gS\ Li"V dhft,A

OR (vFkok)

(a) Why girls should take special care of cleanliness during menstruation? (b) Write any two secondary sexual characters that appear during adolescence in girls. (c) Kanika loves to eat burgers, noodles andpizzas everyday.What are the health problems she is likely to suffer in near future? (any two) (a)fd'kksfj;ksa dk½rqlzkods le; LoPNrkdkvf/d è;ku D;ksa j[kuk pkfg,\ (b)yM+fd;ksadhfd'kksjkoLFkkesafn[kkbZnsusokysdksbZnksxkS.kySafxdy{k.k fyf[k,A (c)dfudkdksgjjkstcxZj]uwMYlvkSjfiTtk[kkukghvPNkyxrkgSA fudV Hkfo"; esa dfudk fdu LokLF; leL;kvksa ls ihfM+r gks ldrh gS\

2+3=5