ias prelims 2020 study plan

UPSC PRELIMS 2020 STUDY PLAN  (Click Here For Full Timetable)



ocean currents


major ocean current

current circulation

indian ocean

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India and World Geography Day 4 Quiz (Click Here)

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1. Spring tides are caused
  • a. As result of the moon and the sun pulling the earth gravitationally in the same direction.
  • b. As result of the moon and the sun pulling the earth gravitationally in the opposite direction.
  • c. Indention in the coast line.
  • d. None of the above.


2. Consider the following regarding melting of ice and its effects

  1. It will lower down Earth’s temperature
  2. It will affect Gravity of Earth
  3. Give way to release of more green house gases

Select the correct code/s

  • a. 1 and 2
  • b. 2 and 3
  • c. 1 and 3
  • d. 1, 2 and 3


3. Consider the following statements:

  1. Ocean currents are a means to maintain heat balance on earth by taking access heat from lower latitudes to higher latitudes.
  1. Cold currents move from higher latitudes to lower latitudes while warm currents flow from lower latitudes to upper latitudes.

Which of the above statements are correct?

  • a. 1 only
  • b. 2 only
  • c. Both 1 and 2
  • d. Neither 1 nor 2


4. Consider the following statements:

  1. Coriolis force exists due to the rotation of the earth.
  2. Coriolis force causes the wind in Northern hemisphere to move towards its right while it causes ocean current in northern hemisphere to move towards its left.

Which of the above statements are correct?

  • a. 1 only
  • b. 2 only
  • c. Both 1 and 2
  • d. Neithr 1 nor 2


5. Ocean currents are like rivers flowing in the ocean. Which of the following forces influences the flow of ocean current?
  • a. Solar heat
  • b. Winds
  • c. Gravity
  • d. All of the above


6. Consider the following statements:

  1. Unusually high and low tides occur during perigee.
  2. Tidal ranges are much less during perihelion.

Which of the above statements is/are incorrect?

  • a. 1 only
  • b. 2 only
  • c. Both
  • d. Neither


7. Which of the following conditions are favorable for generation of Tropical cyclones?

  1. Temperature less than 27 degree Celsius
  2. Absence of coriolis force
  3. Pre existing high pressure area
  4. Large sea surface

Select the correct answer using the codes given below

  • a. 2 and 3 only
  • b. 4 onlycorrect
  • c. 1,2,3 only
  • d. None of the above


8. Sun spots are the one found on the outer surface of the Sun.Consider the statements regarding Sun spots.

  1. Sun spots region generally have lower temperature than the surrounding region on the Sun’s outer surface.
  2. Sun spots do not have any effect on Earth’s climate.
  3. Each period of weak Sun spot activity co-relates with the period of overall high solar radiation output from the Sun’s surface.
  4. Sun spots generally have 11 year cycle.

Choose the correct statement/s from the following codes.

  • a. 1, 2 only
  • b. 1, 3, 4 only
  • c. 1, 2, 4 only
  • d. 2, 4 only


9. Earth although has an average density of 5.5 g/cm^3, its core has a density of more than 11 g/cm^3.What are the possible reasons?

  1. Core is formed of materials like iron, nickel etc which has higher density.
  2. Incumbent pressure from the overlaying rocks.
  3. High temperature prevalent in the core region [more than 5000 degree Celsius].

Choose the correct code from the following.

  • a. 1, 2 only
  • b. 2, 3 only
  • c. 1, 3 only
  • d. All the above


10. The hot dry wind, which is nicknamed as ‘The Doctor’, is
  • a. The Berg
  • b. The Harmattan
  • c. The Bora
  • d. The Sirocco


11. Which of the statement is incorrect about ‘Rip’ Current?
  • a. They are perpendicular to the beach and flow towards it.
  • b. They are formed when breaking waves accumulate water on the shore.
  • c. It can be hazardous to people who are in water.
  • d. They form on the surface of the water.


12. The process of folding is highly unlikely to take place in which of the following rocks

  1. Sedimentary
  2. Metamorphic
  3. Igneous

Select the correct code

  • a. 2 only
  • b. 1 and 3
  • c. 2 and 3
  • d. 1 and 2


13. “These rocks are distinguished by their layer formation. They are also called stratified rocks. They are non-crystalline and often contain fossils of various plants, animals and microorganisms.” What type of rocks is being described in the statement?
  • a. Igneous
  • b. Metamorphic
  • c. Sedimentary
  • d. Can be any type depending upon the location


14. Igneous rocks are formed by cooling and solidification of lava (or magma). Which of the following statements correctly explains the characteristic of igneous rocks?

  1. Plutonic igneous rocks cools and solidifies rapidly, hence they have very small size crystals.
  2. Plutonic igneous rocks are formed at some depth in the earth’s surface. They are never exposed to the earth’s surface.

Select the code from the following

  • a. 1 only
  • b. 2 only
  • c. Both 1 and 2
  • d. Neither 1 nor 2


15. The earth’s crust is divided into two layers- upper crust and lower crust. Which of the following statements are correct about the earth’s crust?

  1. The upper crust mainly consists of granitic rocks while the lower crust consists of Basaltic rocks.
  2. The upper and lower crust is divided by a discontinuity called Conard line.

Select the correct code from the following

  • a. 1 only
  • b. 2 only
  • c. Both 1 and 2
  • d. Neither 1 nor 2


16. Consider the following.

  1. Change in Ocean Temperature
  2. Over exposure to sunlight
  3. Extreme high tides

Which of the following is responsible for coral bleaching?

  • a. 1 only
  • b. 2 and 3 only
  • c. 1 and 2 only
  • d. None of the above


17. Which of the following phenomena is true with respect to boiling water?
  • a. Boiling point of water remains same irrespective of altitude
  • b. Boiling point of water increases with increase in altitude
  • c. Boiling point of water decreases with increases in altitude
  • d. Boiling point is decreases with decrease in altitude.


18. The ocean temperature decreases with increase in depth. However, water at the bottom of the ocean (even in the deepest trenches) is not frozen. Which of the following statements correctly explain the reason for this?
  • a. The ocean surface is covered with ice which creates insulation.
  • b. Due to pressure and salinity condition the water doesn’t freeze
  • c. The body temperature of fishes keeps the water warm.
  • d. There is warm under current constantly flowing on the ocean surface.


19. Coral reefs are not found at the mouth of rivers. Which of the following reasons are responsible for that?

  1. Salinity is less at the mouth of river.
  2. Rivers bring a lot of sediments which causes turbidity in the water.
  3. Corals are washed away by river water

Select the code from the following

  • a. 1 only
  • b. 2 only
  • c. 1 and 2
  • d. 1,2 and 3


20. Consider the following statements about the ‘Roaring Forties’

  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

Choose correct codes from the below given options

  • a. 2 and 3 only
  • b. 2,3 and 4 only
  • c. 1 ,3 and 4 only
  • d. 1,2 and 4 only


21. Consider the following statements related to Cyclones and Anti-cyclones

  1. Cyclone rotates anti-clockwise in Northern hemisphere and anti-cyclone rotates clockwise in Northern Hemisphere.
  2. Cyclones are characterized by fine weather where as Anti-cyclones are characterized by dull weather.
  3. In Cyclone winds blow inward into the region of low pressure , whereas in Anti-cyclone winds blow outwards.

Choose correct codes from the below given options

  • a. 1 and 3 only
  • b. 3 only
  • c. 1 and 2 only
  • d. 2 and 3 only


22. Consider the following statements

  1. Coriolis force is weakest along the equator but increases progressively towards the poles
  2. Trade winds are deflected in anti-clockwise direction in northern hemisphere and Clock-wise direction in the southern hemisphere.

Choose codes from below options

  • a. 1 only
  • b. 2 only
  • c. Both 1 and 2
  • d. None


23. Consider the following

  1. The collision and coalescences of black holes
  2. Supernova collapse to form black holes
  3. The wobbly rotation of neutron stars with deformed crusts

Which of the following is/are the possible reasons for generation of Gravitational waves?

  • a. 1 and 2 only
  • b. 2 and 3 only
  • c. 1 and 3 only
  • d. 1, 2, and 3


24. Which of the following effects on human health are caused by ozone depletion?

  1. Skin Cancer
  2. Cataract
  3. Sunburn
  4. Dyslexia

Select the correct code

  • a. 1 and 3
  • b. 1, 2 and 3
  • c. 1, 2, 3 and 4
  • d. Only 1


25. Consider the statements about Orbital Decay

  1. Orbital Decay results due to only three factors namely atmospheric drag, tidal effects and gravitational radiation
  2. In orbital mechanics, decay is a process that leads to gradual decrease of the distance between two orbiting bodies at their closest approach over many orbital periods.

Select the correct statement/s

  • a. Only 1
  • b. Only 2
  • c. Both
  • d. None


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