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. The Ozone is present in which among the following layers of the atmosphere?
[A] Troposphere
[B] Stratosphere
[C] Thermosphere
[D] Exosphere
Show Answer
Correct Answer: B [Stratosphere]
Notes:
The Ozone lies at an altitude between 30 km and 60 km from the earth’s surface. It spans the stratosphere and lower mesosphere. This layer reflects the harmful ultraviolet radiation. The Ozone layer or the ozonosphere is also called chemosphere because a lot of chemical activity takes place here. The temperature rises at a rate of 5°C per kilometer through this layer.
22. Which is the hottest desert in Mexico?
[A] Atacama
[B] Sonoran
[C] Great Basin
[D] Patagonian
Show Answer
Correct Answer: B [Sonoran ]
Notes:
The Sonoran desert is located in North America. It covers the countries, United States and Mexico. It is the hottest desert in Mexico. It has an area of 260,000 square kilometres.
23. What is the albedo of the earth as a whole?
[A] 55 %
[B] 25 %
[C] 15 %
[D] 35 %
Show Answer
Correct Answer: D [35 %]
Notes:
The proportion of insolation that is reflected back by the surface is called its albedo. It depends upon the nature of the surface upon which the solar radiation is incident and the angle of incidence of the solar beam. The albedo for the earth as a whole is called the planetary albedo and it is 35%.
24. Which among the following statements is not correct about Trade winds?
[A] They are seasonal winds which change their direction periodically with the change in season.
[B] They are extremely steady blowing from sub-tropical high pressure areas towards the equatorial low pressure belt
[C] They get deflected to the right in Northern Hemisphere and to the left in Southern Hemisphere due to Coriolis effect
[D] These winds converge near equator & form the ITCZ
Show Answer
Correct Answer: A [They are seasonal winds which change their direction periodically with the change in season.]
Notes:
Trade winds are planetary or permanent winds which are extremely steady blowing from sub-tropical high pressure areas (30 degree N and S) towards the equatorial low pressure belt. They get deflected to the right in Northern Hemisphere and to the left in Southern Hemisphere due to Coriolis effect and Ferrel’s law. These winds converge near the equator an form the ITCZ.
25. Which is a Mediterranean wind that comes from the Sahara and reaches hurricane speeds in North Africa and Southern Europe?
[A] Loo
[B] Mistral
[C] Sirocco
[D] Fohn
Show Answer
Correct Answer: C [Sirocco]
Notes:
Sirocco is a harm wind causing dry dusty conditions along the northern coast of Africa, storms in the Mediterranean Sea, and cool wet weather in Europe. It is a Mediterranean wind that comes from the Sahara and reaches hurricane speeds in North Africa and Southern Europe.
26. Which type of rainfall is usually associated with Hail and Graupel?
[A] Convectional
[B] Orographic
[C] Frontal
[D] Cyclonic
Show Answer
Correct Answer: A [Convectional ]
Notes:
Convectional rainfall occurs when the air on getting heated becomes light and rises up in convection currents. As the air rises, it expands and drops the temperature and subsequently, condensation takes place and cumulus clouds are formed. Heavy rainfall with lightning and thunder occurs which does not last long. This type of rainfall generally takes place in the equatorial regions and internal parts of the continents, predominantly in the northern hemisphere. This rainfall is usually associated with hail and graupel
27. What are mountains with pointed summits rising from the seafloor which does not reach the surface of the ocean called?
[A] Trenches
[B] Seamounts
[C] Atolls
[D] Coral Reefs
Show Answer
Correct Answer: B [Seamounts]
Notes:
Seamounts are mountains with pointed summits, rising from the seafloor that does not reach the surface of the ocean. They are volcanic in origin. These can be 3,000-4,500 m tall.
28. Who among the following has given the classification of Ocean Deposits?
[A] F. Hoyle
[B] Alexander Humboldt
[C] Sir John Murray
[D] Jeans Jaques
Show Answer
Correct Answer: C [Sir John Murray]
Notes:
Sir John Murray has classified the ocean deposits into two broad categories viz.:
terrigenous deposits – Terrigenous deposits are found mainly on the continental shelves and slopes.
pelagic deposits – pelagic deposits predominate on the deep sea floor.
29. Which among the following ocean deposits is correctly arranged in a chronological order from the surface to the deep parts of ocean?
[A] Sand – Gravel – Clay – Silt – Mud
[B] Gravel – Sand – Silt – Clay – Mud
[C] Sand – Silt – Mud – Gravel – Clay
[D] Clay – Sand – Silt – Gravel – Mud
Show Answer
Correct Answer: B [Gravel – Sand – Silt – Clay – Mud]
Notes:
Sediments brought by rivers, streams, winds, glaciers, oceanic currents, waves etc get deposited upon the continental margins are thereby known as terrigenous deposits.
Accordingly the correct order of ocean deposits from the surface to the depth of ocean is:
Gravel – Sand – Silt – Clay – Mud
30. Which among the following statements is/are correct about the Grassland Biome?
- Grassland biomes are normally situated between a forest and a desert.
- Twenty-five percent of the Earth is covered by the grassland biome.
- There is a grassland biome on each continent with the exception of Antarctica.
Select the correct code from the options given below:
[A] Only 1
[B] Only 3
[C] Only 2 & 3
[D] 1, 2 & 3
Show Answer
Correct Answer: D [1, 2 & 3]
Notes:
Grasslands are characterized as lands dominated by grasses rather than large shrubs or trees. Grassland biomes are normally situated between a forest and a desert. In fact, grasslands surround every desert in Asia. Twenty-five percent of the Earth is covered by the grassland biome. There is a grassland biome on each continent with the exception of Antarctica.
