SARASWATI DEVI INTERNATIONAL SCHOOL, BANKURA

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1 SARASWATI DEVI INTERNATIONAL SCHOOL, BANKURA SUMMER VACATION HOME WORK, CLASS : VIII SUBJECT: SOCIAL SCIENCE HISTORY A. Answer the following questions in detail (15-20 words): 1. What attracted European trading companies to India? 2. How did the assumption of Diwani benefit the East company? 3. What is Dual Government or dyarchy? 4. Explain the system of subsidiary alliance. B. Answer the following question in brief (10-15 words): 1. Who created the first map of India? 2. Who was the first Governor General of the EEIC? 3. Whowas introduced the system of Permanent settlement? GEOGRAPHY A. Answer the following questions (20-25 words): 1. What are the characteristics of resources? 2. Write a brief note on Renewable resource. 3. Why land is consider as an important resource? 4. How are human made resources different from human resource? B. Answer the following questions (40-50 words): 1. What is biotic resource? 2. What is Potential resource? 3. What is non-renewable resource? Civics A. Answer the following question in detail (20-25 words): 1. Why does a democratic country need a constitution? 2. What are Fundamental Rights? 3. What would happen if there were no restrictions on the power of elected representatives? B. Answer the following questions in brief (15-20 words) : 1. When was Dowry prohibition Act passed? 2. Name the national goals laid out by our constitution. 3. Write the two salient features of Indian constitution. 1 P a g e C l a s s - V I I I S D I S, B a n k u r a

Subject - Science 1. What happens when (a) Dilute sulphuric acid is poured on a copper plate? (b) Iron nails are placed in copper sulphate solution? Write word equations of the reactions involved. 2.

2 Subject - Science 1. What happens when (a) Dilute sulphuric acid is poured on a copper plate? (b) Iron nails are placed in copper sulphate solution? Write word equations of the reactions involved. 2. What is 4R formula? Explain. 3. Why sodium and potassium are kept in kerosene? 4. Phosphorus is a very non-metal. 5. Distinguish between metals and non-metals based on their physical properties. Gives the exceptions also. 6. Avoid plastics as much as possible. Comment on the statement. 7. How rayon is different from other synthetic fibres? 8. Explain why the following are made of thermosetting plastics. (a) Saucepan handles (b) Electric plugs/switches/plug boards 9. Write four differences between thermoplastics and thermosetting plastics. 10. Manufacturing synthetic fibres is actually helping conservation of forests. Comment. 11. Name three natural methods of adding nutrients to soil. 12. Why should grains be dried before storage? 13. What method of irrigation will you use if you live in a dry area with shortage of water? 14. Discuss two methods of weeding in which poisonous chemicals are not used. 15. Crop rotation is practised by farmers so that they have different products to sell in the market in every season. Do you agree? Give reasons. 16. Do you expect to find fully-grown crop plants in nursery? Why? Why not? 17. What is animal husbandry? 18. How does a refrigerator stop spoiling of food? 19. The picture given below shows a disease caused by a bacteria in wheat plant. Explain the cause and symptoms of this disease. 20. Give some uses of some useful microbes. 2 P a g e C l a s s - V I I I S D I S, B a n k u r a

3 SUBJECT English 1. The face on the wall - page = The last lesson page = 8-12 Write in a copy as English Handwriting. 1. Which of the following is not a perfect square? SUBJECT MATHS (a) 361 (b) 1156 (c) 1128 (d) For a fixed base, if the exponent decreases by 1, the number becomes (a) One-tenth of the previous number. (b) Ten times of the previous number. (c) Hundredth of the previous number. (d) Hundred times of the previous number. 3. In ABC, (c) AB + BC > AC (b) AB + BC < AC (d) AB + AC < BC (d) AC + BC < AB 4. The perimeter of the rectangle whose length is 60 cm and a diagonal is 61 cm is (a) 120 cm (b) 122 cm (c) 71 cm (d) 142 cm 5. If one of the angles of a triangle is 110, then the angle between the bisectors of the other two angles is (a) 70 (b) 110 (c) 35 (d) If D is the mid-point of the side BC in ABC where AB = AC, then ADC is (a) 60 (b) 45 (c) (d) In the standard form of a rational number, the denominator is always a (a) 0 (b) negative integer (c) positive integer (d) 1 8. In each of the following cases, write the rational number whose numerator and denominator are respectively as under: (a) 5 39 and 54 6 (b) ( 4) 6 and 8 2 (c) 35 ( 7) and (d) and Circumference of a circle is always (a) more than three times of its diameter (e) less than three times of its diameter 10. Circumference of a circle of diameter 5 cm is (b) three times of its diameter (d) three times of its radius (a) 3.14 cm (b) 31.4 cm (c) 15.7 cm (d) 1.57 cm 11. A perfect square number having n digits where n is even will have square root with (a) N+1 digit (b) digit (c) digit (d) digits 12. What will be the area of the largest square that can be cut out of a circle of radius 10 cm? (a) 100 cm2 (b) 200 cm2 (c) 300 cm2 (d) 400 cm2 13. The hypotenuse of a right triangle with its legs of lengths 3x 4x is (a) 5x (b) 7x (c) 16x (d) 25x 3 P a g e C l a s s - V I I I S D I S, B a n k u r a

4 14. How many natural numbers lie between 5 2 and 6 2? (a) 9 (b) 10 (c) 11 (d) The area of a rectangular field whose length is twice its breadth is 2450 m2. Find the perimeter of the field. 16. A student said that since the square roots of a certain number are 1.5 and 1.5, the number must be their product, What error did the student make? 17. How many square metres of carpet will be required for a square room of side 6.5m to be carpeted? 18. Find three numbers in the ratio 2:3:5, the sum of whose squares is A three digit perfect square is such that if it is viewed upside down, the number seen is also a perfect square. What is the number? (Hint: The digits 1, 0 and 8 stay the same when viewed upside down, whereas 9 becomes 6 and 6 becomes 9.) 20. ABCD is a quadrilateral in which AB = 5 cm, CD = 8 cm and the sum of angle A and angle D is 180. What is the name of this quadrilateral? (a) Parallelogram (b) Trapezium (c) Rhombus (d) Cannot be determined 21. If is an operation such that for integers a and b we have a b = a b 2 a b + b b ( a) b + b b then find (i) 4 ( 3) (ii) ( 7) ( 1) Also show that 4 ( 3) ( 3) 4 and ( 7) ( 1) ( 1) ( 7) 22. The cells of a bacteria double in every 30 minutes. A scientist begins with a single cell. How many cells will be there after (a) 12 hours (b) 24 hours 125. Planet A is at a distance of km from Earth. 23. About 230 billion litres of water flows through a river each day. How many litres of water flows through that river in a week? How many litres of water flows through the river in an year? Write your answer in standard notation. 24. Simplify : 25. Arrange in scendingorder :,, 26. Simplify :() () 27. {( ) } " 28. Which is greater or ( )? 29. If # = # #% then find the value of x. 30. % # & = 128 ; #& = #& find the value of x and y. 31. Write a rational number in which the numerator is less than 7 11 and the denominator is greater than If 12 shirts of equal size can be prepared from 27m cloth, what is length of cloth required for each shirt? students are studying English, Maths or both. 62 per cent of the students are studying English and 68 per cent are studying Maths. How many students are studying both? 34. A body floats ( of its volume above the surface. What is the ratio of the body submerged volume to its exposed volume? Re-write it as a rational number 35. Explain that all fractions are rational numbers but all rational numbers are not fractions. 4 P a g e C l a s s - V I I I S D I S, B a n k u r a

36. A wall of a room is of dimensions 5 m 4 m. It has a window of dimensions 1.5 m 1m and a door of dimensions 2.25 m 1m. Find the area of the wall which is to be painted. 37.

5 36. A wall of a room is of dimensions 5 m 4 m. It has a window of dimensions 1.5 m 1m and a door of dimensions 2.25 m 1m. Find the area of the wall which is to be painted. 37. Priyanka took a wire and bent it to form a circle of radius 14 cm. Then she bent it into a rectangle with one side 24 cm long. What is the length of the wire? Which figure encloses more area, the circle or the rectangle? 38. A circular pond is surrounded by a 2 m wide circular path. If outer circumference of circular path is 44 m, find the inner circumference of the circular path. Also find area of the path 39. Two poles of 10 m and 15 m stand upright on a plane ground. If the distance between the tops is 13 m, find the distance between their feet. 40. In the given figure, lines AB, CD and EF intersect at O. Find the measure of AOC, COF. 41. In the given figure, POQ is a line. Ray is another ray lying between rays and Prove that 42. In the given figure if PQ PS, PQ SR, SQR = 28 and QRT = 65, then find the values of x and y 43. In the following figure find PRQ? 44. In the given figure, lines PQ and RS intersect at T. Find SQT? 5 P a g e C l a s s - V I I I S D I S, B a n k u r a

6 45. In the given figure, find BOC? 46. In the given figure, AB CD,the value of x is 47. One of the angles of a triangle is 80º and the other two angles are equal. Find the measure of each of the equal angles. 48. The angles of a triangle are arranged in ascending order of magnitude. If the difference between two consecutive angles is 10, find all the three angles 49. Prove that a triangle must have at least two acute angles. 50. Prove that The sum of all interior angles of a triangle is SUBJECT BENGALI a j HL V ec, Ae ¹L m d l HL S un b L AeÉ S un h u k Ju l BaÈLb e Sl i o u (150 V) n ël j dé h T u m M z SUBJECT HINDI Gunjan- Page= 9,10,14,15,16,17,18,22,23,24,29,30,31. (Write the page in a copy as hindi handwriting.) 6 P a g e C l a s s - V I I I S D I S, B a n k u r a

Grade 8(Mathematics) EV 4( )

Grade 8(Mathematics) EV 4( ) Chapter-2 (Number system) Grade 8(Mathematics) EV 4(2016-17) Q. Find the three rational numbers between 3/5 and 3/4. Sol:- let,, be the required rational numbers. = ½ (3/5 + 3/4) = ½ ( ) = ½ 27/20 = 27/40