11. The Largest mass extinction marks the end of which Era?
[A] Paleozoic
[B] Mesozoic
[C] Cenozoic
[D] Neoproterozoic
Show Answer
Correct Answer: A [Paleozoic]
Notes:
The Largest mass extinction marks the extinction of the Paleozoic era. Almost 95% of all the life forms disappears in the fossil record.
12. What is the radius of the inner core?
[A] 2220 km
[B] 1220 km
[C] 6250 km
[D] 3200 km
Show Answer
Correct Answer: B [1220 km ]
Notes:
The inner core is a hot dense ball, mainly composed of iron (85%) and nickel. the radius of the inner core is 1220 km.
13. Who explained the Convectional Current Theory?
[A] Alfred Wegener
[B] Harry Hess
[C] Arthur Holmes
[D] Parker
Show Answer
Correct Answer: C [Arthur Holmes]
Notes:
Arthur Holmes, an English geologist explained in 1930s the Convectional Current Theory. According to him the convectional currents play an important role in the movement of plates.
14. What are the gently sloping deposits on the windward side of the obstructions such as hills called?
[A] Sand shadows
[B] Inselbergs
[C] Seifs
[D] Oghards
Show Answer
Correct Answer: A [Sand shadows]
Notes:
The gently sloping deposits on the windward side of the obstructions such as hills are called as sand shadows. They get deposited on the windward side.
15. Hummocks, Pingos and Plasas are associated with which of the following processes of formation?
[A] Cryogenic process
[B] Fluvial process
[C] Aeolian process
[D] Glacial process
Show Answer
Correct Answer: A [Cryogenic process]
Notes:
Cryogenic landforms are associated with the permafrost formations. They typically occurin ice covered regions.
Landforms of cryogenic processes include:
Pingos
Plasas
Lithalsa
Hummocks,etc
16. Which among the following is a long mesa that at one end slopes upward to higher terrain?
[A] Erg
[B] Inselberg
[C] Cuesta
[D] Potrero
Show Answer
Correct Answer: D [Potrero]
Notes:
Potrero in spanish is a common land in poor condition. Potreros are long mesas that slopes upward at one end to a higher terrain.
17. Which among the following statements is not correct about waterfall?
[A] It is an area where water flows over a vertical drop or a series of steep drops in the course of a stream or river.
[B] They are commonly formed in the lower stage of the river
[C] They can have a wide range of widths and depths.
[D] Angel Falls in Venezuela is the world’s tallest above-water waterfall.
Show Answer
Correct Answer: B [They are commonly formed in the lower stage of the river]
Notes:
The area where the water flows over a vertical drop or a series of steep slopes or drops in the course of a stream or a river is called a waterfall. They are commonly formed in the upper stage of the river. They have a wide range of width and depth. Angel Falls in Venezuela is the world’s tallest above-water waterfall (979 metres).
18. What is the collective name of the six deep blue lakes, which forms a national park, located in Afghanistan?
[A] Lake Istadeh-ye Moqor
[B] Lake Hamun
[C] Lake Band-e Amir
[D] Lake Ab-e Istada
Show Answer
Correct Answer: C [Lake Band-e Amir]
Notes:
Lakes of Band-e Amir is a collection pf six deep blue lakes located in the Bamyan province of Afghanistan. It is located in the middle of barren grey wasteland of Central Afghanistan. These lakes are composed of high mineral contents which is responsible for it’s deep blue color.
19. What is a river that runs wholly or partly beneath the ground surface called?
[A] Ephemeral river
[B] Subterranean river
[C] Exotic river
[D] Youthful river
Show Answer
Correct Answer: B [Subterranean river]
Notes:
Subterranean river is a river that wholly or partly runs beneath the found surface. They are found flowing through cave systems.
20. What are landforms of ridges deposited by a glacier or ice sheet transverse to ice flow called?
[A] Rogen moraine
[B] Drumlins
[C] Arete
[D] Oasis
Show Answer
Correct Answer: A [Rogen moraine]
Notes:
Landforms of ridges deposited by a glacier or ice sheet transverse to ice flow are called rogen moraine. They mainly occur in scotland and ireland.
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