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Prelims Daily Questions

Dec 1st, 2021 - Daily Quiz

1. Consider the following islands:
  1. Mauna Loa
  2. Galapagos
  3. Marshall Islands
  4. Mauritius
Which of the above islands or groups of islands are volcanic in nature? (a) 3 only (b) 1, 2 and 4 only (c) 2 and 4 only (d) 1, 2, 3 and 4   2. In which of the locations of the world is Laurentian Climate found?
  1. Eastern part of Argentina
  2. North America
  3. Siberia
Select the correct answer using the code given below: (a) 1 only (b) 2 and 3 only (c) 1 and 2 only (d) 1, 2 and 3   3. Which of the following factors is/are responsible for the occurrence of Tides?
  1. The rotation of the earth
  2. The gravitational forces exerted by the Sun
  3. The gravitational forces exerted by the Moon
(a) 1 only (b) 2 and 3 only (c) 1 and 2 only (d) 1, 2 and 3   4. Consider the following gas composition of the atmosphere
  1. Nitrogen
  2. Oxygen
  3. Argon
  4. Carbon dioxide
  5. Neon
Arrange these gases in the decreasing order (a) 2 1 3 4 5 (b) 1 2 3 4 5 (c) 3 2 1 5 4 (d) 1 2 3 5 4   5. Consider the following pairs about the Ocean Current
  1. Gulf Stream Current - Cold 
  2. Falkland Current - Cold 
  3. Mozambique Current - Warm 
Which of the following pairs given above is/are correct? (a) 1 only (b) 2 only (c) 1 and 3 only (d) 2 and 3   Answers 1. (b) All are examples of volcanic islands except the Marshall Islands. Many of the islands in the oceans are the topmost parts of the cones of volcanoes that rise from the ocean bed. Most of them are extinct, but there are also some active ones. The best known volcanic peak of the Pacific Ocean is Mauna Lao in Hawaii. The volcanic islands are scattered in most of the earth's oceans. In the Pacific Ocean, they occur in several groups such as Hawaii, the Galapagos Islands, and the South Sea Islands. St. Helena - Atlantic Ocean Azores islands - Atlantic Ocean Mauritius and Reunion island – Indian Ocean The Marshall Islands, Gilbert and Ellice Islands of Pacific are Coral islands.   2. (b)
The Laurentian Climate or Cool Temperate Eastern Marine Climate has features of both the maritime and continental climates. Laurentian type of climate is found only in two regions and that too only in the northern hemisphere. They are:  North-eastern North America, including eastern Canada, north-east U.S.A., and Newfoundland. This may be referred to as the North American region. Eastern coastlands of Asia, including eastern Siberia, North China, Manchuria, Korea and northern Japan or the Asiatic region.  It is absent in Southern Hemisphere because only a small section of the southern continents extends south of the of 40°S latitude. Some of these small sections come under the rain-shadow region of Andes (Patagonia) and hence Westerlies hardly ever reach these regions. So these regions are subjected to aridity rather than continentiality. In other regions, the oceanic influence is so profound that neither the continental nor the eastern margin type of climate exists.
3. (d)
Tide are the periodical rise and fall of the sea levels, once or twice a day, caused by the combined effects of the gravitational forces exerted by the sun, the moon and the rotation of the earth or the centrifugal force of the Earth. Hence, the correct answer is (d).  The centrifugal force is the force that acts to counter the balance the gravity. Together, the gravitational pull and the centrifugal force are responsible for creating the two major tidal bulges on the earth. On the side of the earth facing the moon, a tidal bulge occurs while on the opposite side through the gravitational attraction of the moon is less as it is farther away, the centrifugal force causes tidal bulge on the other side. The ‘tide-generating’ force is the difference between these two forces; i.e. the gravitational attraction of the moon and the centrifugal force. On the surface of the earth, nearest the moon, pull or the attractive force of the moon is greater than the centrifugal force, and so there is a net force causing a bulge towards the moon. On the opposite side of the earth, the attractive force is less, as it is farther away from the moon, the centrifugal force is dominant. Hence, there is a net force away from the moon. It creates the second bulge away from the moon. On the surface of the earth, the horizontal tide generating forces are more important than the vertical forces in generating the tidal bulges.  
4. (b) Nitrogen-78.08% Oxygen- 20.95% Argon- 0.93% Carbon Dioxide- 0.036% Neon- 0.002%    5. (d)
Ocean Currents of the World

Name of Current

 Nature of Current
North Equatorial Current Hot or Warm
Kuroshio Current Warm
North Pacific Current Warm
Alaskan Current Warm
Counter Equatorial Current Warm
El Nino Current Warm
Tsushima Current Warm
South Equatorial Current Warm
East Australian Current Warm
Humboldt or Peruvian Current Cold
Kuril or Oya shio Current Cold
California Current Cold
Antarctica Current Cold
Okhotsk Current Cold
Florida Current Warm
Gulf Stream Warm
Norwegian Current Warm
Irminger Current Warm
Rannell Current Warm
Antilles Current Warm
Brazilian Current Warm
Labrador Current Cold
Canary Current Cold
Eastern Greenland Current Cold
Benguela Current Cold
Antarctica Current Cold
Falkland Current Cold
Mozambique Current Warm and Stable
Agulhas Current Warm and Stable
South-West Monsoon Current Warm and unstable
North-East Monsoon Current Cold and unstable
Somali Current Cold and unstable
Western Australian Current Cold and Stable
South Indian Ocean Current Cold
The Ocean Currents in the northern hemisphere deflect towards their right and in the southern hemisphere deflect towards their left due to the Coriolis force. The only exception to this rule of the flow of ocean water is found in the Indian Ocean, where the direction of current flow changes with the change in the direction of monsoon wind flow. It is noteworthy that the cold currents are lesser in number as compared to the warm or hot current.


POSTED ON 01-12-2021 BY ADMIN
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