KENDRIYA VIDYALAYA, BADMAL: WINTER BREAK TASK: 2015 2016 STD.: X Subject: Mathematics 1) The difference of square of two numbers is 180. The square of smaller number is 8 times larger number. Find the two numbers. 2) A train travels 360km at uniform speed. If the speed increases to 5km/h more, the train will take 1h less for the journey. Find the speed of the train. 3) It is possible to design a rectangular park of perimeter 80m and area 400m 2. Find the length and breadth. 4) The sum of 4 th and 8 th term of A.P. is 24 and sum of 6 th and 10 th term is 44. Find the first three terms of A.P. 5) How many multiples of 4 lies between 10 and 250? 6) Find the sum of first 1000 positive numbers. 7) If, sum of first 7 terms of an A.P. is 49 and sum of first 17 terms is 289. Find the sum of the end term. 8) The angle of elevation of top of a tower from a point on the ground which is 30m away from the foot of the tower is 30 0. Find the height of the tower. 9) From the top of 7m height building, angle of elevation of the top of a cable tower is 60 0 and angle of depression of its foot is 45 0. Determine the height of the tower. 10) Prove that parallelogram circumscribing a circle is rhombus. 11) Prove that the angle between two tangents drawn from an external point to a circle is supplementary to angle subtended by the line segment joining the point of contact at centre. 12) Construct a triangle of 6cm, 7cm, 8cm. Then a similar triangle whose sides are 2/3 of corresponding sides of first triangle. Social Science Class Xth History1. Draw Maps of the world Europe after the treaty of vienna 1815. 2. Nationalism in India s Important dates and events (Pg-66) Write in H/W Geo-Major non-metals and metals producing states in India and conventional nonconventional which is ecofriendly & why. Eco-Pol Sci- Money credit Popular struggle Political parties Excluding text question write 15 question in H/W. KENDRIYA VIDYALAYA NO.1, BOLANGIR WINTER-BREAK HOLIDAY HOMEWK 2015-16 CLASS-X: ENGLISH 1. READING : A) Read completely the extract from Julius Caesar (Act- II/Scene-II, Act III/Scene I & II) and sum them up in your own word B) Read a few articles published in various newspaper and magazines and stick them in your H.W notebook. C) Read The Story of My Life from chapters 15 to 23. Page 1 of 6
2. WRITING : A) Write a letter to the editor of regional newspaper, expressing your concern over the growing incidence of bullying by strong and notorious students in school. You are Mohit/Meera of New Horizon School, Agra. 3. Collect five short biographical accounts of renowned personalities, one each from the field of science, literature, sport, art and social work. Stick them in your notebook along with their photos/pics. 4. Develop bio-sketches of these well known personalities:- a) Narendra Modi b) Kiran Bedi c) Virat Kohli d) Chetan Bhagat 5. You are aiming to sensitive your schoolmates on the bad habit of being addicted to junk food and its harmful effects through a speech to be presented in the morning assembly. Write the speech you are planning to deliver. You are Akash/Akriti. 6. Child abuse in the form of child labour has assumed an alarming proportion as a social evil. This handicap has not deprived the budding ones of their rights and opportunities but undermined their potential, growth and overall their lives. Write an article as Yogesh/Yogita of Malavya Nagar, New Delhi, on this topic titled Child Labour - a blot on civilized society. 7. Write an interesting story that begins with.. Once upon a time, in the deep forest.. Paste colourful pictures to illustrate your story. Winter holiday homework Subject physics CLASS X Q.1.A person cannot sea the object nearer than 75cm from his eyes while a person with normal vision can see objects upto 25 cm form his eyes. Find the nature, the focal length and the power of correcting lens used for defective vision. Q.2.Why does a concave mirror has a real principal focus? Q.3. Can a convergent lens in one medium become divergent in another medium? Q.4. In the following figure, one lens is placed inside each box. State the nature of the lens. Complete the ray diagram. Q.5.Why does a ray of light parallel to principal axis bends towards the principal axis in the case of concave mirrors and goes away form principal axis in case of a convex mirrors. Page 2 of 6
Q.6. A concave lens have the focal length of 10 cm. An object 2.5 cm high is placed at 30 cm from the lens. Determine the position and size of the image. Q.7. A doctor has prescribed a corrective lens of power + 105 D. find the focal length of the lens. Is the prescribed lens is converging or diverging. Class-X Sub.- Chemistry (1) Exercise work of carbon and its compounds. (2) Make notes on Dobereiner s triads, Newlands Law of octaves and Mendeleev s periodic table. (3) Write a note on the cleaning action of Soap. (Describe by the micelles formation) (4) Inside question answer of Carbon and its compounds. (5) Write detail about Ethanol and Ethanoic acid. (Chemical reaction and physical properties) (6) Project work- Make a modern periodic table having 118 elements. Showing name of the element, its atomic no., Atomic mass and Symbol. KENDRIYA VIDYALAYA, BADMAL: WINTER BREAK TASK: 2015 2016 STD.: X Subject: Biology (Science) 1) Name the life process of an organism that helps in the growth of its population. (2015) 1 2) State the meaning of vegetative propagation. (2011) 1 3) What is meant by heredity? (2011) 1 4) Write any two differences between binary fission and multiple fission in a tabular form as observed in cells of organisms. (2011) 2 5) Explain giving one example of each, the unisexual and the bisexual flowers.(2011)2 6) State one genetically different feature between sperms and eggs of humans. What is its consequence? (2012) 2 7) State the role of placenta in the development of embryo. (2012) 2 8) What is the genetic difference between sperms and eggs in case of humans? What is its significance in reproduction? (2012) 2 9) What is meant by sex chromosome? State its two types. Mention the sex chromosomes in male and female of human beings. (2011) 2 10) Explain how equal genetic contribution of male and female parents is ensured in the progeny. (2012) 3 What are chromosomes? Explain how in sexually reproducing organisms the number of chromosomes in the progeny is maintained. (2015) 3 11) List six specific characteristics of sexual reproduction. (2015) 3 12) What is DNA copying? How many copies of DNA are created in a reproducing cell? Why is DNA copying considered as essential part of the process of reproduction? (2011) 3 Page 3 of 6
13) What is meant by asexual reproduction? List two modes of each of asexual reproduction used by (i) unicellular organisms, (ii) multicellular organisms. (2011)3 14) Explain the meaning of sexually transmitted diseases (STDs). Give two examples of STDs each, caused due to (i) bacterial infection and (ii) viral infection. State in brief how the spread of such diseases may be prevented. (2012) 3 (a) List two sexually transmitted diseases in each of the following cases: (i) Bacterial infections (ii) Viral infections. (b) How may the spread of such diseases be prevented? (2011) 15) A blue colour flower plant denoted by BB is crossbred with that of white colour flower plant denoted by bb. 3 (a) State the colour of flower you would expect in their F1 generation plants. (b) What must be the percentage of white flower plants in F2 generation if flowers of F1 plants are self pollinated? (c) State the expected ratio of the genotypes BB and Bb in the F2 progeny. (2012) A blue colour flower plant denoted by BB is crossbred with that of pink colour flower plant denoted by bb. 3 (a) State the colour of flower you would expect in their F1 generation plants. (b) if flowers of F1 plants are self pollinated, what will be the percentage of pink flower plants in F2 generation? (c) State the expected ratio of the genotypes BB and Bb in the F2 progeny. (2012) 16) If we cross pure bred tall (dominant) pea plant with pure bred dwarf (recessive) pea plant we will get pea plants of F1 generation. If we now self cross the pea plant of F1 generation, then we obtain pea plants of F2 generation. (a) What do the plants of F1 generation look like? (b) State the ratio of tall plants to dwarf plants in F2 generation. (c) State the type of plants not found in F1 generation but appeared in F2 generation, mentioning the reason for the same. (2012) 3 17) What is meant by the term speciation? List four factors which could lead to speciation. (2012) 3 State the meaning of speciation. List four factors responsible for speciation. (2012) 18) Distinguish between homologous organs and analogous organs. In which category would you place wings of a bird and wings of a bat? Justify your answer giving a suitable reason. (2012) 3 19) List and explain in brief three methods of contraception. (2012) 3 State three methods of contraception practiced to avoid pregnancy, giving one example of each. (2012) List four categories of contraceptive methods. State in brief two advantages of adopting such preventive methods. (2015) 20) List in tabular form two distinguishing features between acquired traits and inherited traits, with one example of each. (2012) 3 21) How are fossils formed? Describe, in brief, two methods of determining the age of fossils. 3 What is meant by fossils? State in brief two ways of estimating the age of fossils. (2012) Page 4 of 6
22) Explain with examples how the following are evidences in favour of evolution in organisms. 3 (i) Homologous organs (ii) Analogous organs (iii) Fossils (2011), (2015) 23) What are fossils? How are fossils formed? Describe in brief the method of determining the age of fossils. (2011) 3 24) All Homo sapiens have originated from a common ancestor and yet they show tremendous variation in size, colour and appearance. Explain in brief. (2011) 3 25) Explain the terms/following: (i) Speciation (ii) Natural Selection. (2011), (2015) 3 26) Describe any three ways in which individuals with a particular trait may increase in population. (2011) 3 27) State the evidence we have for the origin of life from inanimate matter. (2011) 3 28) What are fossils? What do they tell us about the process of evolution? (2011) 3 29) Describe in brief the role of (i) testis (ii) seminal vesicle, (iii) vas deferens, (iv) ureter and (v) prostate gland in human male reproductive system. (2012) 5 30) Draw a diagram of human female reproductive system and label the part (i) That produces eggs. (ii) Where fusion of egg and sperm takes place. (iii) Where zygote is implanted. What happens to human egg when it is not fertilized? (2012) 5 य करण- HINDI श तक ल न ग हक य क दसव - 1. रस कस कहत ह? रस क म ख क र क प च प च उद हरण स हत समझ इए - 2. रचन क आध र पर व य क म ख भ द क प च प च उद हरण स हत समझ इए - 3. व य कस कहत ह? व य क म ख क र क स द हरण समझ इए 4. पद प रचय य ह? म ख य कर णक पद क पद प रचय प च च उद हरण स द जए प - स जन मक ल खन- स क त ब द ओ क आध र पर 500 श द म नब ध ल खए- 1) क य टर आज क आव यकत क य टर य ग -, व भ न म उपय गत, स चन य गक क वरद न, क य टर बन जग स न, उपस ह र 2) प तक क मह व- प तक सबस अ छ म, रण क त, समय क सह सद पय ग, उपस ह र 3) इ क सव सद क भ रत- ज स भर क पन, उपल धय, वत म न क मय, व व म भ रत क थ न, उपस ह र 4) बढ़त मह ग ई ( त वन )भ मक, द नक ज वन पर भ व, बढ़त मह ग ई क क रण, द भ व, सरक र य स, न ग रक क कत य, उपस ह र न-र ल आर ण क क अ यव थ क ज नक र द त ह ए, ब धक, उ र र व, नई द ल क प ल खए Page 5 of 6
नप क स प दक क प ज र न म लक क ओर स प ल खए - कस द नक सम च र -, जसम दन- त दन बढ़ रह मह ग ई क सम य क ओर सरक र क य न आक ष त कय गय ह न -आप म य नगर च क, बल सप र म रहन व ल अ मत क म र ह (.ग.छ) स क लत पर भ गद - क त य र क ज नक र द त ह ए र म म दर क ल न, भ वन वर व ल अपन म म रहन (ओ ड़श ) न क प ल खए नआपक म जग न थ ब ह र क य व य लय - स गठन व र आय जत अ खल भ रत य ब ड म टन तय गत म थम आय ह इस पर अपन स नत य त करत ह ए अपन म क बध ई प ल खए नवल खन -. 1अपन त दन क ख ट म ठ अन भव क अपन ड यर म र चक श ल म ल खए -. 2आपक व य लय म व ष क सव क आय जन ह न ह इस ह त आप भ क ई द क वत य, द कह न एव एक लघ न टक कल मक श ल म ल खए आल ख ल खन- 1. आप क य व य लय बड़म ल क व य थ ह अपन व य लय न ज वन क ख ट म ठ अन भव -, य दग र ल ह व उपल धय पर एक स च आल ख ल खए य वह रक क य (ज वन म य श ण) स दय नगर बड़म ल क ख बस रत वन तर क स र व - य कदम उठ य ज न आव यक ह -स वध न क लए य? आप इसम य भ मक नभ सकत ह? व त रप व क ल खए पर पय ग अ य स क य - स क लत पर भ गद क प व वष क न प म स प ण प य म क - अन स र द न प क अ य स कर उ र ल खए SANSKRIT Page 6 of 6