Important Questions
Question 1. Where is the Blacknecked Crane seen in India?
Answer: Ladakh
Question 2. Where did the first recorded incident of release of hazardous waste occur in India?
Answer: Monghyr
Question 3. What percentage of land in India is under forest cover?
Answer: About 14 per cent
Question 4. The Mussoorie hills of the Doon valley in Uttar Pradesh are being destroyed by:
Answer: Quarries
Question 5. Which aquatic animal has been released on a large scale in the Ganga to rid it of waste flesh?
Answer: Turtle
Question 6. What fraction of land in India is lying waste as a result of environmental problems?
Answer: one-third
Question 7. Where is the National Museum of Natural History located?
Answer: New Delhi
Question 8. Why is the Silent Valley so called?
Answer: It is silent during night
Question 9. Which river serves the largest cultivable area?
Answer: Ganga
Question 10. Which Indian State has named all its tourist resorts after birds?
Answer: Haryana
Question 11. The distance of the Earth from the Sun is about _____
Answer: 149 million km.
Question 12. The sun comprises _____% of the total matter of the solar system.
Answer: 99.86
Question 13. The permanent tilt of the Earth’s axis and the revolution of the Earth in its orbit together cause _____
Answer: Varying lengths of day and night at different times of the year.
Question 14. The Earth’s axis always points in the same direction in the sky to _____
Answer: The Pole star.
Question 15. The Earth is permanently tilted to its orbital plane at an angle of _____
Answer: 66-1/2°
Question 16. At the summer solstice in the Northern Hemisphere, _____ latitudes will have the longest night.
Answer: 66°S
Question 17. When the Sun is vertically overhead along the Tropic of Capricorn at midday, _____
Answer: Night is equal to 24 hours at the North pole.
Question 18. 1° of longitude represents _____
Answer: 111 kms along the equator.
Question 19. ‘Great Circles’ can extend in _____
Answer: any direction.
Question 20. The ‘International Date Line’ is _____
Answer: the line at which a day is lost or gained.
Question 21. To avoid confusion the world is divided into _____
Answer: 24 belts, each 15° of longitude wide.
Question 22. The Northern Hemisphere receives its maximum and minimum amount of solar radiation during _____
Answer: June and December respectively.
Question 23. Which is referred to as ‘Land of the Midnight Sun’?
Answer: In summer the region north of the arctic circle.
Question 24. Canada and the USA have _____
Answer: Five time zones.
Question 25. The stratification of sedimentary rocks is caused mainly by _____
Answer: The deposition of rock particles in layers.
Question 26. A rift valley is formed mainly because of the _____
Answer: Forces of tension in the Earth’s crust.
Question 27. The ‘Cigar’ shaped planetary system confirms to the __
Answer: Tidal Hypothesis.
Question 28. Binary Star Hypothesis was given by _____
Answer: Russel and Littleton.
Question 29. Movements occurred in Palaeozoic Era are _____
Answer: Taconian, Caledonian, Armonican, Variscon.
Question 30. The ‘Deccan Lava Region’ was formed during _____
Answer: Cretaceons period.
Question 31. The ‘Transverse waves’ are _____
Answer: ‘S’ waves.
Question 32. Which pair is ‘incorrect?
(a) Conrad Discontinuity—Between Sial and Sima.
(b) Mohorovicic Discontinuity—Between Crust and Mantle.
(c) Repetti Discontinuity—Between Upper Mantle and Lower Mantle.
Answer: None.
Question 33. Asthenosphere is _____
Answer: the layer beneath the lithosphere.
Question 34. Who used the term ‘Isostasy’ (equal standing) for the first time?
Answer: Dutton.
Question 35. ‘Continental drift’ refers to _____
Answer: the horizontal movement of the continents on a vast scale.
Question 36. The idea of Continental drift was developed in America by _____
Answer: F.B. Taylor.
Question 37. The Wegener’s Hypothesis is associated with _____
Answer: The continental drift.
Question 38. The hypothesis of ‘sea-floor spreading’ was first formulated by _____
Answer: Prof. Harry Hess of Princeton University.
Question 39. In the hypothesis of ‘plate-tectonics’, it is assumed that the earth is composed of _____
Answer: 20 litospheric plates.
Question 40. If the time at Greenwich is 6.00 A.M., what is the longitude at which the time is 2 A.M.?
Answer: 60°
Question 41. If the time at the Greenwich is 10.00 P.M. on April 20, what is the longitude of the place where the time is 8 A.M. on April 21?
Answer: 150°E
Question 42. Gabbro is an example of _____
Answer: Extensive rocks.
Question 43. Lava-obsedian is an example of _____
Answer: Igneous rocks.
Question 44. The ‘Batholiths’ covering small areas are called _____
Answer: Stocks.
Question 45. ‘Boss’ is _____
Answer: the Magma after cooling is not parallel to the layers around it and makes an angle with them.
Question 46. Which pair is incorrect?
(a) Loess—Wind-borne sedimentary rocks.
(b) Till—Ice-deposited sedimentary rocks.
(c) Breccia—Sedimentary rocks formed because of the process of comenation.
Answer: None.
Question 47. Which pair is incorrect?
(a) Conglomerate—Mechanically formed sedimentary rocks.
(b) Coal—Organically formed sedimentary rocks.
(c) Saltpetre—Chemically formed sedimentary rocks.
Answer: None.
Question 48. Which feature may occur when lava cools at the surface?
Answer: Basalt plateau.
Question 49. An intrusion of magma along a bedding plane is called____
Answer: Sill.
Question 50. When a mass of magma cuts across the bedding plane, then it is called _____
Answer: Dyke.