World & Physical Geography MCQs
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. Which among the following layers of the earth’s atmosphere helps in Radio transmission?
[A] Troposphere
[B] Stratosphere
[C] Mesosphere
[D] Thermosphere
Show Answer
Correct Answer: D [Thermosphere]
Notes:
The Thermosphere is located between 80 and 400 km above the mesopause. It contains electrically charged particles known as ions.It is therefore known as Ionosphere. The temperature here starts increasing with heights. Radio waves transmitted from the earth are reflected back to the earth by this layer.
22. The Kalahari desert is located in which among the following continents?
[A] Africa
[B] Asia
[C] Europe
[D] South America
Show Answer
Correct Answer: A [Africa]
Notes:
The Kalahari Desert is a large semi-arid sandy savannah in Southern Africa. It covers the countries: Botswana, parts of Namibia and regions of South Africa. It covers an area of 930,000 square kilometres.
23. Which among the following statements is not correct about cyclones?
[A] Cyclones rotate anti-clockwise in Northern Hemisphere and clockwise in Southern Hemisphere.
[B] Cyclone is any low-pressure area with winds spiralling inwards
[C] About 65 per cent of cyclonic activity occurs between 10° and 20° latitude.
[D] They are mostly formed in eastern tropical oceans
Show Answer
Correct Answer: D [They are mostly formed in eastern tropical oceans]
Notes:
Tropical cyclones form mostly on the western margins of the oceans.
They don’t form in the eastern tropical oceans because the cold currents lower the surface temperatures of the eastern parts of the tropical oceans making them unfit for the breeding of cyclonic storms.
24. The Lomonosov Ridge is located in which among the following Oceans?
[A] Southern
[B] Pacific
[C] Atlantic
[D] Arctic
Show Answer
Correct Answer: D [Arctic]
Notes:
The Lomonosov Ridge is a band of continental crust that stretches across the Arctic Ocean and separates the Mesozoic Amerasian Basin from the Cenozoic Eurasian Basin.
25. Which among the following layers of ocean and density is/are correctly matched?
- Surface Layer – Highest density
- Pynocline Layer – Sharp density gradient
- Deep or bottom layer – Lowest but uniform density.
Select the correct code from the options given below:
[A] Only 1
[B] Only 2
[C] Only 1 & 3
[D] 1, 2 & 3
Show Answer
Correct Answer: B [Only 2]
Notes:
Salinity is directly positively related to seawater density.
There are 3 layers in seawater from sea surface to the ocean bottoms. They are
Surface Layer of Lowest density
Pynocline Layer of sharp density gradient
Deep or bottom layer of highest but uniform density.
26. Which among the following currents keep the temperature higher along the eastern coast of US?
[A] Labrador current
[B] West Wind Drift
[C] Humboldt current
[D] Gulf Stream current
Show Answer
Correct Answer: D [Gulf Stream current]
Notes:
The currents have a significant effect on the climate of the coastal areas. There are differences in temperature between the western and the eastern coasts at the same latitudes. For example, the eastern coast of US in the tropical zone is warmer than the western coast. The Gulf Stream keeps the temperature higher along the eastern coast.
27. Which among the following statements is/are correct about soils?
- The clay-humus complex is essential for a fertile soil as it provides it with a high water and nutrient holding capacity.
- The humus in the soil however increases the risk of erosion.
Select the correct code from the options given below:
[A] Only 1
[B] Only 2
[C] Both 1 & 2
[D] Neither 1 & 2
Show Answer
Correct Answer: A [Only 1]
Notes:
The clay-humus complex is essential for a fertile soil as it provides it with a high water and nutrient holding capacity. Humus acts as a cement binding the soil particles together and thus reducing the risk of erosion.
28. In which among the following soils the proportion of fine particles is relatively higher?
[A] Clayey Soil
[B] Silt Soil
[C] Loamy Soil
[D] Sandy Soil
Show Answer
Correct Answer: A [Clayey Soil]
Notes:
The soil is classified on the basis of the proportion of particles of various sizes.
If soil contains greater proportion of big particles it is called sandy soil.
If the proportion of fine particles is relatively higher, then it is called clayey soil.
29. Which among the following types of Grasslands is characterized by scattered trees?
- Savannah Grassland
- Temperate Grassland
Select the correct code from the options given below:
[A] Only 1
[B] Only 2
[C] Both 1 & 2
[D] Neither 1 & 2
Show Answer
Correct Answer: A [Only 1]
Notes:Savanna is grassland with scattered individual trees. Savannas of one sort or another cover almost half the surface of Africa and large areas of Australia, South America, and India. Savannas are always found in warm or hot climates where the annual rainfall is from about 50.8 to 127 cm (20-50 inches) per year.
Temperate grasslands are characterized as having grasses as the dominant vegetation. Trees and large shrubs are absent.
30. What does the term “Polynya” refer to?
[A] A genus of brown macroalgae found in both temperate and tropical oceans globally.
[B] A narrow water passage linking two seas or large water bodies.
[C] An area of open, unfrozen sea water encapsulated by sea or pack ice.
[D] A ring-shaped coral reef outlining a lagoon either partially or fully.
Show Answer
Correct Answer: C [An area of open, unfrozen sea water encapsulated by sea or pack ice.]
Notes:
A “Polynya” is an open, unfrozen sea area surrounded by pack ice. These areas of persistent open water can mostly be oval or circular but may also have irregular shapes. Two types exist: Coastal Polynyas, located beyond land-fast ice and remaining static throughout winter, and Open Ocean Polynyas which are larger and sustained, associated with deep water upwelling. Examples include the North Water Polynya found off Greenland’s coast and the larger Weddell Polynya in the Weddell Sea of Antarctica.
