World Geography Questions (MCQs) for UPSC, State PCS and SSC Examinations
World Geography Multiple Choice Questions (MCQs) Quiz for State and UPSC Civil Services Examinations. Objective Questions on Physical Geography and World Geography for competitive examinations.
21. The coral reefs are important in our lives because __:
- They provide variety of ecosystem services
- Some islands would not have survived without them
- They work as sinks of atmospheric carbon
- They support variety of ocean life
Which among the above is / are correct?
[A] Only 1, 2 & 3
[B] Only 2, 3 & 4
[C] Only 1, 2 & 4
[D] 1, 2, 3 & 4
Show Answer
Correct Answer: C [ Only 1, 2 & 4]
Notes:
The third statement in this question may trap you. Coral reefs, which rather than act as ‘carbon sinks’ are found to be slight ‘carbon sources’. It has been long believed that the precipitation of calcium carbonate results in the sequestering of carbon. But the precipitation of calcium carbonate is accompanied by a shift of pH that results in the release of CO2. Various studies have concluded that the coral reefs are sources, not sinks, of atmospheric carbon.
22. In which region do we find the belt of Doldrums?
[A] Polar region
[B] Sub-tropical region
[C] Temperate region
[D] Equatorial region
Show Answer
Correct Answer: D [ Equatorial region]
Notes:
Doldrums or equatorial belt of calms, area around the earth centered slightly north of the equator between the two belts of trade winds. The large amount of solar radiation that arrives at the earth in this area causes intense heating of the land and ocean. This heating results in the rising of warm, moist air; low air pressure; cloudiness; high humidity; light, variable winds; and various forms of severe weather, such as thunderstorms and squalls. Hurricanes originate in this region. The doldrums are also noted for calms, periods when the winds disappear, trapping sailing vessels for days or weeks.
23. Which of the following is / are the subduction zones?
- Southeast Asia
- Andes Mountains
- Mid-Atlantic Ridge
- Caribbean Plate
Select the correct option from the codes given below:
[A] Only 1 & 2
[B] Only 2 & 3
[C] Only 2, 3 & 4
[D] Only 1, 2 & 4
Show Answer
Correct Answer: D [ Only 1, 2 & 4]
Notes:
Mid Atlantic Ridge is where the two plates are diverging, which creates more oceanic floor. Thus, it is not subduction zone. Rest all are subduction zones.
24. With respect to Geomorphology, what are ‘Inselbergs’?
[A] Desert counterpart of the delta formed due to depositional aeolian action
[B] Residual hills formed due to erosional aeolian action
[C] Semi-circular steepsided depression formed through depositional glacial action
[D] Landform created due to combined action of fluvial erosional and depositional
Show Answer
Correct Answer: B [Residual hills formed due to erosional aeolian action]
Notes:
Inselberg are similar to the monadnocks found in peneplains.They are formed due to erosional aeolian action.
25. Consider the following countries:
- Lesotho
- Afghanistan
- Hungary
Which of the above is/are landlocked countries?
[A] 2 Only
[B] 1 and 2 Only
[C] 1,2 and 3
[D] None
Show Answer
Correct Answer: C [ 1,2 and 3]
Notes:
All the above mentioned countries are land locked.
26. Consider the following:
- Africa
- South America
- Australia
In which of the above you can find Savannas?
[A] Only 1 & 2
[B] Only 2 & 3
[C] Only 1 & 3
[D] 1, 2 & 3
Show Answer
Correct Answer: D [ 1, 2 & 3]
Notes:
Savannas are found in tropical parts of Africa, South America, and Australia. They are characterized by extensive grasslands spotted with occasional patches of trees. They receive 50-150 cm annual precipitation, unevenly distributed throughout year. Rainfall patterns produce a seasonally structured ecosystem. Fire is a common feature of Savannah. Many trees are involved in nitrogen fixation.
27. Consider the following:
- Coal bed
- Sea bed
- Metamorphic rocks
Which of the above is/are source(s) for Methane gas production?
[A] 1 Only
[B] 1 & 2 Only
[C] 2 Only
[D] 1, 2 & 3
Show Answer
Correct Answer: D [ 1, 2 & 3]
Notes:
Methane gas can be extracted from frozen methane hydrate deposits under the sea beds. Coal gas methane from coal beds and methane gas from metamorphic rocks.
28. Consider the following comparisons of Arctic Tundra and Antarctic Tundra:
- There are no mammalian fauna in Antarctic Tundra, while they are plenty in Arctic Tundra
- Antarctic Tundra has more extreme temperatures in winters in comparison to Arctic Tundra
Which of the above is / are correct statements?
[A] Only 1
[B] Only 2
[C] Both 1 & 2
[D] Neither 1 nor 2
Show Answer
Correct Answer: B [Only 2]
Notes:
The major difference between Arctic Tundra and Antarctic Tundra is that Antarctic Tundra lacks a large mammal fauna, while in Arctic Tundra we find an array of mammals. The reason is that Antarctica is physically isolated from other continents. However, it is not correct to say that the antarctica has no mammals aty all. Its shores are inhabitated by Sea mammals and sea birds, including seals, walruses and penguins. Further, some small mammals, like rabbits and cats, have been introduced by humans to some of the subantarctic islands.
29. Crystal formation can be found more commonly in which of the following types of rocks?
[A] Intrusive igneous rocks
[B] Extrusive igneous rocks
[C] Metamorphic rocks
[D] Sedimentary rocks
Show Answer
Correct Answer: A [Intrusive igneous rocks]
Notes:
When an igneous rock has cooled quite slowly at depth inside the earth, it is known as intrusive rock. As the molten material solidifies below the surface, it cools very slowly and forms rocks with large crystals. Granite is an example of it.
30. Consider the following statements:
- Earth has greater rotational velocity at equator than at poles
- Coriolis effect decreases from equator towards poles
Which of the above statements is/are correct?
[A] 1 Only
[B] 2 Only
[C] Both 1 & 2
[D] Neither 1 nor 2
Show Answer
Correct Answer: A [1 Only]
Notes:
First statement is correct. Second statement is incorrect because Coriolis Effect increases from equator towards poles and is zero at equator. Coriolis force is an apparent force caused by the earth's rotation.
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