Chapter- Management of Natural Resources Questions Bank 1. What is pollution? 2. What is Afforestation? 3. Name two sources which are threats to our marine water? 4. Name the two sources of water pollution? 5. Give two advantages of using wind energy? 6. What is soil erosion and its causes? 7. What are the sources of water pollution? 8. What do you mean by term N.G.O? 9. Describe the factors responsible for pollution of river Ganga? 10. Name the chemical which is responsible for depletion of ozone layer? 11. What do you mean by the term biota? 12. What is water harvesting? 13. What is agriculture? 14. What do you mean by the term effluents? 15. What are the ill effects of ozone layer depletion? 16. What are pesticides and herbicides? 17. Distinguish between national parks and national sanctuaries. 18. What are the steps one may take to check soil erosion? 19. How can we control water pollution? 20. How is ozone gas useful for our ecosystem? 21. What is water table? State some characteristics of drinking water. 22. Name the disease caused by the prolonged inhalation of cotton fiber dust. 23. What do you mean by eutrophication? 24. What is food chain? What forms the basis of every food chain? 25. Name a pollutant which enters our body via food chain. 26. Which chemical compound is responsible for the depletion of ozone layer? 27. What is acid rain? How has acid rain affected our ecosystem? 28. Discuss briefly the main causes of soil erosion? 29. Give an example of greenhouse gas. 30. What is smog? 31. Give the full form of the following IUCN and DDT 34. The flow of energy in the food chain is unidirectional. Comment. 35. Name a pollutant which enters our body via food chain. Read further on above topic X(10th) Management of Natural Resources Questions Banks with solution Visit to Download X Biology: Solved Questions: Management of natural resources Visit to Download 10th Science - Our Environment Questions Banks for CBSE Board Visit to Download
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Compound Interest CBSE Maths Test Paper
1. Find compound interest on Rs. 8000 at 15% per annum for 2 years 4 months, compounded annually. Ans: Rs. 3109. 2. Find the compound interest on Rs. 10,000 in 2 years at 4% per annum, the interest being compounded half-yearly. Ans: Rs. 824.32. 3. In what time will Rs. 1000 become Rs. 1331 at 10% per annum compounded annually? Ans: 3 years. 4. If Rs. 600 amounts to Rs. 683.20 in two years compounded annually, find the rate of interest per annum. Ans: 8% p.a. 5. The difference between the compound interest and simple interest on a certain sum at 10% per annum for 2 years is Rs. 631. Find the sum. Ans: Rs.63, 100. 6. The difference between the compound interest and the simple interest accrued on an amount of Rs. 18,000 in 2 years was Rs. 405. What was the rate of interest per annum? Ans: 15% 7.Divide Rs. 1301 between A and B, so that the amount of A after 7 years is equal to the amount of B after 9 years, the interest being compounded at 4% per annum. Ans: Rs.676 and Rs.625 8. A sum of money amounts to rs.6690 after 3 years and to rs.10, 035 after 6 years on compound interest. Find the sum Ans: Rs.4460. 9. A sum of money doubles itself at compound interest in 15 years. In how many years will it become eight times? Ans: 45 years. 10. Amit took a loan of Rs.390625 from HDFC Finance. If the company charges interest at 16% per annum, compounded quarterly, what amount will discharge his debt after one year? Ans: . Rs 45697 11. At what rate percentage per annum will a sum of rupees 4000 yield compound interest of rupees 410 in 2 years. Ans: 5% 12. The compound Interest on a certain sum of money for 2 years is Rs 820 and the SI on the same sum for the same period is Rs 800 .find the sum and the rate of interest .Ans 5% 13. The value of a machine depreciates at 12.5% per annum. it was purchased 3 yrs ago. If its present value is Rs.13720, Find the original value of machine. Ans: Rs.20480 14. The C.I. on a certain sum for 2 years is Rs.410 and S.I. is Rs.400. Find the rate of interest per annum? Ans: 5% 15. Class: X Subject: Mathematics Assignment: 2013 Chapter: Probability.
1. 17 cards numbered 1, 2, 3 …, 16, 17 are put in a box and mixed thoroughly. One person draws a card from the box. Find the probability that the number on the card is: (i) Odd (ii) Even (iii) a Prime (iv) Divisible by 3 (v) Divisible by 3 and 2 both. 2. Two customers are visiting a particular shop in the same week (Monday to Saturday). Each is equally likely to visit the shop on any one day as on another. What is probability that both will visit the shop on (i) same day (ii) different days? 3. Three coins are tossed once. Find the probability of: (i) 3 heads (ii) Exactly 2 heads (iii) At least 2 heads 4. Cards marked with numbers 3 to 152 are thoroughly mixed. If one card is drawn at random, find the probability that the number on the card is: - (i) An odd number (ii) A number less than 25 (iii) A number greater than 140 (iv) A number which is a perfect number (v) A prime number between 10 and 40. 5. In a class, there are 18 girls & 16 boys. The class teacher wants to choose 1 pupil for class monitor. She writes the name of each pupil on a card & puts them into a basket & mixes thoroughly. A child is asked to pick up one card from the basket. What is the probability that name written on the card is:- (i) the name of a girl (ii) the name of a boy. 6. 1500 families with 2 children were selected randomly, and the following data were recorded: Compute the probability of a family chosen at random, having: - (i) 2 girls (ii)1girl (iii) no girl Also check whether the sum of these probabilities is 1. 7. Find the Probability of getting 53 Sundays in a leap year. 8. Find the probability of getting 53 Sundays in a non-leap year. 9. A dice is thrown twice. What is the Probability of (i) 5 will not come up either time? (ii) 5 will come up at least once? [Hint: throwing a dice twice and throwing two dice simultaneously are treated as the same experiment.] 10.Two dice are thrown. Determine Probability of getting a multiple of 2 on the first dice and a multiple of 3 on the other. 11.Two dice are thrown simultaneously. Find the Probability of getting: - (i) A total of 2 (ii) A sum of 7 (iii) A sum of 6 (iv) A sum of 8 (v) Doublets of even numbers. Number of girls in family: 2 1 0 Number of families: 475 814 211 12.There are 840 tickets sold in a raffle. Bhawna bought 5 tickets and Shilpy bought 4 tickets. What is Probability that (a) Bhawna has a winning ticket? (b) Shilpy has a winning ticket? 13.A card is drawn from an ordinary pack and gambler bets that it is a spade or ace. What are odds against his winning the bet? 14.Two customers Shyam and Ekta are visiting a particular shop in the same week (Tuesday to Saturday) each is equally to visit the shop on any day as on another day. What is the Probability that both will visit the shop on :- (i) Same day (ii) Consecutive days (iii) Different days. 15. Two dice are thrown simultaneously. List the sample space for this experiment. 16.In a single throw of 2 dices find the probability of getting:- (a) A total of 7 (ii) A total of 11 (iii) Doublets (iv) Six as a product. 17.A box contains 19 balls bearing numbers 1, 2… 19. A ball is drawn at random from the box. What is Probability that number of the ball is:-(i) a prime number (ii) divisible by 3 or 5 (iii) neither divisible by 5 nor 10 (iv)an even number 18.From a pack of 52 playing cards, jacks, queens, kings and aces of red colour are removed. From the remaining cards one card is drawn. Find the Probability that the card drawn is: (a) A black queen (b) A red card (c) A jack (d) A diamond (e) A black card. Oral questions for Formative and Summative Assessments
Q.1.Name the planet appears to the northern sky before sun rise? Ans: Venus brightest of all planets Q.2. Name the planet which has max number of moons? Ans: Jupiter have max number of moons manly consist of hydrogen and helium gases Q.3. In which direction stars move except Polar star? Ans: When seen from earth stars appear to move from east to west. Q.4. Why pole star appears stationary? Ans: As it lies on the imaginary axis of the rotation of the earth. Q.5.Which two planets have asteroids between them? Ans: Asteroids are the rocks pieces that revolve around the sun between the orbit of Mars and Jupiter. Q.6. Which comet visit the earth after 76 year? Ans: Halley’s comet. Heavenly bodies that revolve around the sun and appears as bright as glowing ball with a long tail is called comet. Q.7.What happen to meteors when enters the earth’s atmosphere? Ans: meteors when enters the earth’s atmosphere starts glowing and are seen as a bright steak of light fleshing momentarily across the sky. Q.8.What is the high tog geostationary satellite from the earth surface? Ans: 36000km and used for satellite communicacation. Q.9. what does term INSAT mean? Ans: Indian National Satellite. Q.10.Name the first Indian satellite launched success fully. Ans: Aryabhata on 19 april,1975 11. What is the vast space which includes everything around us called? Ans: Universe 12. Name the various objects that constitute the universe? Ans: All the stars, the sun, the planet and their moon, meteorites, comets. 13. What is the distance travelled by light in one year called? Ans: One light year=9460 billion kilometer 14. How much time sunlight takes to reach the earth? Ans: 8.3 sec. 15. What material the stars are made up of? Ans: Hydrogen gas 16. Name the celestial bodies you see in night sky? Ans: stars 17. Why celestial bodies appear to move from east to west in the sky? Ans: This is because the earth rotates from west to east. 18. Name the stars which appear stationary when sea from earth? Ans: The pole star or Druvtara 19. Name the galaxy we belong to? Ans: milky Way (Akash Ganga) 20. What is the most distinguish Feature of Jupiter? Ans: Great red spot. It is believed to be a storm in its atmosphere. Further study links Stars and The Solar System Oral questions CCE FA Test CBSE Ch. Stars and The Solar System (Physics) MCQ 8th Multiple Choice Questions Universe stars and planets Test Paper Based on CCE (With Solution) Solved 8th (VIII) chapter The Universe Test Paper Stars and The Solar System- Question bank VIII(8th) 8th Stars and the solar system CBSE assignment NCERT SOLUTON FOR Chapter Solar system |
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