3.Write speech in words on the topic:- Importance of Adult Education & Save water Save life & Tree plantation

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1 KV Keshavpuram(Shift-1) CLASS X holidays homework English 1. Read the following novel and write its book review: The Story of My Life by Hellen Keller. 2.You are Naresh. You happen to go to Agra in a crowded bus on a hot summer day. Record your experience in the form of a paragraph. 3.Write speech in words on the topic:- Importance of Adult Education & Save water Save life & Tree plantation 4.Write article on the following:- Importance of newspaper, A visit to historical places, & My hobby 5. Read and cut out articles from the newspapers based on various environmental issues. Of the material you collect. Ban the Plastic bag,water woes, Green India, Energy efficiency ह द कक ष दसव न ब ध ल ख र जभ ष ह न द स वच छत और म र कततव य सवतश क ष अशभय क म त व पय तवरण स रक ष आपद प रब ध व य करण 1 रस क पररभ ष, प रक र,एव द -द उद रण शलख I 2 शमश र व क य क पररभ ष,प रक र एव प रत य क क दस - दस उद रण शलख I

2 3 व च य क पररभ ष,प रक र एव प रत य क क दस - दस उद रण शलख I 4 स ज ञ, सवत म, क र य क प रक र एव उद रण शलख I SCIENCE HOLIDAY HOMEWORK (SCIENCE) TENTH (1 ST SHIFT) Q1.If a plant is releasing CO2 and taking in oxygen during the day, does it mean that there is no photosynthesis is occurring? Justify your answer. Q2.Why is small intestine in herbivores longer than in carnivores? Q3.What will happen if mucus is not secreted by the gastric glands? Q4.What is the significance of emulsification of fats? Q5. Why is the rate of breathing in aquatic much faster than in terrestrial organisms? Q6. Why is blood circulation in human heart called double circulation? Q6. What would happen if green plants disappear from earth? Q7. Leaves of a healthy potted plant were coated with Vaseline.Will this plant remain healthy for long? Give reasons for your answer. Q8. How does aerobic respiration differ from anaerobic respiration? Q9.Whyn is parallel arrangement used in domestic wiring? Q10. Three incandescent bulbs of 100W each are connected in series in an electric circuit. In another set of three bulbs of the same wattage are connected in parallel to the same source. (a)will the bulb in the two circuits glow with same brightness? Justify your answer. (b) Now let on bulb in both the circuits get fused. Will the rest of the bulbs continue to glow in each circuit? Give reasons. Q11.Draw a circuit diagram of an electric circuit containing a cell, a key, an ammeter, a resistor of 2 in series with a combination of two resistors (4 each) in parallel and a voltmeter across the parallel and a voltmeter across the parallel combination. Will the potential difference across the 2 resistor be the same as that across the parallel combination of 4 resistors? Give reason. Q12.How does use of fuse wire protect electrical appliances?

3 Q13.What is electrical resistivity? In a series electrical circuit comprising a resistor made up of a metallic wire, the ammeter wire, the ammeter reads 5A. The reading of the ammeter decreases to half when the length of the wire is doubled. Why? Q14.Find out the following in the electric circuit given in figure 12.9 (a) Effective resistance of two 8 resistors in the combination (b) Current flowing through 4 resistor (c) Potential differences across 4 resistance (d) Power dissipated in 4 resistor (e) Difference in ammeter reading, if any. `` Q15. FeSO4 decomposes with the evolution of gas having a characteristics odour of burning sulphur. Write the chemical reaction involved and identify the type of reaction. Q16. Why do fire flies glow at night? Q17. Grapes hanging on the plant do not ferment but after being plucked from the plant can be fermented? Is it a chemical or a physical change? Q18. A substances X, which is an oxide of a group 2 element, is used intensively in the cement industry. This element is present in the bones also. On treatment with water it forms a solution which turns red litmus blue. Identify X and also write the chemical reactions involved. Q19.A magnesium ribbon is burnt in oxygen to give a white compound X accompanied by emission of light. If the burning ribbon is now placed in an atmosphere of nitrogen, it continues to burn and forms a compound Y. (a) Write the chemical formulae of X and Y. (b) Write a balanced chemical equation, when X is dissolved in water. Q20. Zinc liberates hydrogen gas when reacted with dilute hydrochloric acid, whereas copper does not. Explain why?

4 Q21.A silver article generally turns black when kept in the open for few days. The article when rubbed with toothpaste again starts shining. (a) Why do silver article turn black when kept in the open for a few days? Name the phenomenon involved. (b) Name the black substances formed and give its chemical formula. PROJECT:- Make a innovative model for SCIENCE EXHIBITION. CLASS X POLYNOMIALS Q1 - If a,b are zeroes of polynomials p(x) = x 2 -lx+m, then find the value of A. 1 a + 1 b B. a 2 +b 2 C. a b + a b Q2 If the sums of the square of the zeroes of the polynomials p (x) 25. Find the value of a. = x 2 + 7x a is Q3 Find which of the number 1, -1,-3 are zeroes of the polynomial 2x 4 + 9x 3 +11x 2 +4x-6. Q4 Obtain all the zeroes of the polynomial f(x) = x 4-3x 2 -x 2 +9x-6, if two of its zeroes are - 3 and 3. Q5 What must be subtracted from the polynomial f(x) = x 4 +2x 3-13x 2-12x+21 so that the resulting polynomials is exactly divisible by x 2-4x +3? Q6 What must be added to the polynomial f(x) = x 4 + 2x 3 2x 2 +x 1, so that the resulting polynomial is exactly divisible by x 2 +2x-3? Q7- Find the zeroes of the polynomial f(x) = 4 3x 2 +5x and verify the relationship between the zeroes and its coefficients. Q8 If sum of the zeroes of the quadratic polynomial f(x) = x 2 8x+k is 40, find the value of k. Q9 - If a and b are zeroes of the quadratic polynomial f(x)= x 2 -x-2, find a polynomial whose zeroes are 2a +1 and 2b +1 LINEAR EQUATION IN 2 VARIABLES

5 Q1- Draw the graph of the equation : a. 2y-x = 8 b. 5y x = 14 c. y-2x = 1 Obtain the vertices of the triangle so obtainsed. Also Q2 Determine graphically the vertices of the trapezium, the equation of whose sides are : x= 0, y=0, y=4 and 2x +y =6. Also determine its area. Q3- Solve : A. 2(3x-v) = 5uv 2(u+3v)=5uv b. 5 = 3 3(3x 2y) 2, 5-3 = 61 4(x+2y) 5(3x 2y) (x+2y) + C, x-y+3=4 x-2y-2z = 9 2x+y+3z d. a(x+y) + b(x-y) = a 2 -ab+b 2 a(x+y) b (x- y) = a 2 +ab+b 2 e. x+y = a-b ax by = a 2 +b 2 Q4 find the value of p and q for which of the following system of liner equation has infinite number of solution. Q5 - In ABC, /_c = 3/_ b = 2(/_a+ /_ b). Find the three angles. Q6 8 mens and 12 boys can finish a piece of work work in 10 days. While 6 men and 8 boys can finish it in 14 days. Find the time taken by one man alone and that by one boy alone to finish the work. Solve ncert exemplar exercise and all examples real number, polynomial, linear equation in two variable. REAL NUMBERS

6 Q1 Two tankers contain 850 litres and 680 litres of petrol respectively. Find the maximum capacity of a container. Which can measure the petrol of either tanker in exact number of times (Use Eulid s algorithm). Q2 Determine prime factorization of Q3 Prime that 7 is an irrational number. Q4 Prove that is an irrational number. Q5 Write the denominator of the rational number in the form of 2m x 5 n, where m,n are non negative integers. Hence, write the decimal expansion, without actual division. Q6 Check whether 6 n can end with the digit of 0 for any national number x. कक ष दसव न ब ध ल ख र जभ ष ह न द स वच छत और म र कततव य सवतश क ष अशभय क म त व पय तवरण स रक ष आपद प रब ध व य करण 1 रस क पररभ ष, प रक र,एव द -द उद रण शलख I 2 शमश र व क य क पररभ ष,प रक र एव प रत य क क दस - दस उद रण शलख I 3 व च य क पररभ ष,प रक र एव प रत य क क दस - दस उद रण शलख I 4 स ज ञ, सवत म, क र य क प रक र एव उद रण शलख I

7 ग र ष मक ल न वक श-ग हक ययम कक ष दशम 1. स स क त-प र र त एव स स क तच छ त र-प रनतज ञ ल ख म, कण ठस र करण च 2. स वपररचयस य अभ य स: 3. प हठतप ठ मभ य स: 4. प चत त रस य चतस र: कर : पठ य :, कक ष य च श र वण य : 5. प ठ य म ववद यम ब द-ध त - र प ण -कण ठस र करणम (प रनतहद एक:) स वरसन न ध- व यञ ज सन न ध-ववसर तसन ध प रभ य स: 6. स वरसन न ध-व यञ ज सन न ध-ववसर तसन ध प रभ य स: Social Science 1 What type of soil is found in the river deltas of the Easter coast? Give three main features of this type of soil. 2 Imagine if oil supplies get exhausted, how will this affect our life style? Give your views in 120 line with proper examples. 3 Write a note on good practices towards conserving forest and wildlife. 4 Collect information on how industries are polluting our water resources. 5 Write same examples of Hydraulic structures in ancient India. 6 Draw a map of major rivers and dams of India. 7 How do social divisions affect politics? Explain with proper examples.

Kendriya Vidyalaya, Keshav Puram (shift-i)

Kendriya Vidyalaya, Keshav Puram (shift-i) Summer Vacation Holidays Homework CLASS IX (ENGLISH) 1.WRITE ARTICLES ON THE FOLLOWING IMPORTANCE OF ADULT EDUCATION, SAVE WATER SAVE LIFE, IMPORTANCE OF SPORTS,