Physical Geography (UPSC) (Part-I)

Total Questions: 50

31. Along which one of the following meridians did India experience the first light of the sunrise of the new millennium? [2000]

Correct Answer: (d) 92°30' E  
Solution:
  • The first light of the sunrise of new millenium in India experienced at Kathal island of Andaman and Nicobar, which is located at 92 °30 E meridian.   

32. Consider the following statements: [2000]

  1. Tides are of great help in navigation and fishing.
  2. High tide enables big ships to enter or leave the harbour safely   
  3. Tide prevents siltation in the harbours
  4. Kandla and Diamond Harbour are tidal ports

Which of these statements are correct?

Correct Answer: (d) 1, 2, 3 & 4
Solution:All the given statements are true.

33. Consider the following statements about the 'Roaring Forties': [2000]

  1. They blow uninterrupted in the northern and Southern Hemispheres
  2. They blow with great strength and constancy
  3. Their direction is generally from north-west to east in the Southern Hemisphere  
  4. Overcast skies, rain and raw weather are generally
    associated with them

Which of these statements are correct?

 

Correct Answer: (b) 2, 3 & 4
Solution:The westerlies in the southern hemisphere is called as roaring forties; lies between 40° S to 50° S and is a permanent wind. It is slow over landmass. It is uninterrupted in Southern hemisphere but it is discontinued in northern hemisphere due to landmasses.

34. Which one of the following weather conditions is indicated by a sudden fall in barometer reading? [2001]

Correct Answer: (a) Stormy
Solution:In stormy weather condition the pressure of atmosphere varies, which causes sudden fall in barometer reading.

35. Who amongst the following was the first to state that the earth was spherical? [2001]

Correct Answer: (a) Aristotle
Solution:Aristotle in 340 B.C first stated that the earth was spherical in his book "On the Heaven".

36. If the stars are seen to rise perpendicular to the horizon by an observer, he is located on the: [2001]

Correct Answer: (a) Equator
Solution:If the stars are seen to rise perpendicular to the horizon by an observer then the observer is at the equator because celestical equator is an imaginary circle around the sky directly above the earth's equator. It is always 90° from the pole. All the stars rotate in a path that is parallel to the celestical equator.

37. Consider the following statements made about sedimentary rocks: [2001]

  1. Sedimentary rocks are formed at Earth's surface by the hydrological system
  2. Formation of sedimentary rocks involves the weathering of preexisting rocks
  3. Sedimentary rocks contain fossils
  4. Sedimentary rocks typically occur in layers

Which of these statements are correct?

Correct Answer: (d) 1, 2, 3 & 4
Solution:All the statements are true about the sedimentary rock.

38. Volcanic eruptions do not occur in: [2001]

Correct Answer: (a) Baltic Sea
Solution:Volcanic eruptions do not occur in the Baltic Sea.
In case of Baltic sea, the Baltic sea does not lie in between the tectonic plates but instead the basathic rock found in Baltic sea is transported by glacier so volcanic eruptions do not occur in Baltic sea.

39. Quartzite is metamorphosed from: [2001]

Correct Answer: (c) sandstone
Solution:Quartzite is a metamorphosed form of sandstone.

40. Identify the correct order of the process of soil-erosion from the following: [2001]

Correct Answer: (a) Splash erosion, Sheet erosion, Rill erosion, Gully erosion
Solution:The correct order of soil erosion process is splash erosion, sheet erosion, rill erosion and gully erosion. Splash occurs when the raindrop hits the surface; explosive impact soil into individual particles. Sheet erosion is the detachment of soil particles by rain drop and their removal down slope by water flowing overland as a sheet in definite channels. Rill erosion refers to the development of small ephemeral concentrated flow paths which function as both sedimentary source and sediment delivery systems for erosion on hill slopes. Sheet erosion removes the this top layer by raindrop kill or orion occurs in lines which are less than 30 cm deep when these rills are deeper than 30 forming channels are called as gully erosion. Gully erosion occurs when water flows in narrow channels after heavy rain and melting snow.