Oceanography (Optionals IAS Mains Geography): Questions 1 - 9 of 9

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Question number: 1

» Oceanography » Law of the Sea and Marine Pollution

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Appeared in Year: 2016

Essay Question▾

Describe in Detail

Discuss Maritime Zones.

Explanation

Maritime Zone is the area of water surface of any country where there is national rights of that country over mineral and biological resources. Maritime borders are generally used to identify the edge of international waters.

There are different types of maritime zones in the sea or ocean. The division into maritime zones is made according to th

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Question number: 2

» Oceanography » Bottom Topography of the Atlantic, Indian & Pacific Ocean

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Essay Question▾

Describe in Detail

Explain the oceanic relief features of the blue planet.

Explanation

  • Our Earth acquires its name as ‘the blue planet’ because of the presence of oceans which comprises more than 70 % or 140 square miles of the earth’s surface. It is very necessary to study about the oceans. The formal oceanographically investigation began with the British Expedition of the Challenger.
  • The relief of the ocean is similar to the la

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Question number: 3

» Oceanography » Law of the Sea and Marine Pollution

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Appeared in Year: 2016

Essay Question▾

Describe in Detail

Bring out the various ecological problems associated with the exploitation and use of oceans and their resources.

Explanation

  • 71 % area of the earth’s surface is covered by the vast ocean. The vast water reservoir provides resources as well as challenges for us. It is came to known from recent technologies that oceans possess more natural resources than the continents. But man has not developed such techniques to utilize it completely.

  • The marine resources are class

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Question number: 4

» Oceanography » Currents and Tides

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Appeared in Year: 2016

Essay Question▾

Describe in Detail

“The relationship between the winds and the currents is best seen in the Indian Ocean. ” Justify.

Explanation

  • There is a relationship between the winds and the currents in the Indian Ocean. The currents of Indian Ocean are well affected by the monsoon winds and the land areas around it. Indian Ocean is surrounded by Indian Peninsula in the North, Africa in the west and Australia in the south, due to this currents do not flow permanently. In the northern

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Question number: 5

» Oceanography » Currents and Tides

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Essay Question▾

Describe in Detail

Explain movement of ocean currents & thermohaline circulation.

Explanation

Ocean current are stream of water moving in a specific direction observed in oceans.

Thermohaline circulation refers to global circulation of ocean currents observed in ocean, which leads to transport of warm water towards poles and cold water towards equator. As the name suggests thermohaline circulation are currents caused by thermal & salinity

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Question number: 6

» Oceanography » Waves

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Essay Question▾

Describe in Detail

In light of the recent Tsunami in Indonesia (2018) explain the causes and mitigation measures.

Explanation

Tsunami which is series of waves in water body caused by displacement of large volume of water, generally in an ocean. It can be caused by earthquake, volcanic eruptions, landslides, man-made underwater explosions, meteorite impacts etc. have the potential to generate tsunami. The recent tsunami in Indonesia (Sulawesi Tsunami) in 2018 was a cause

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Question number: 7

» Oceanography » Bottom Topography of the Atlantic, Indian & Pacific Ocean

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Essay Question▾

Describe in Detail

Discuss the various oceanic layers and origin of Ocean basin.

Explanation

  • The ocean which consists of many layers showcases the effect of sunlight, water pressure, temperature or depth and which in turn creates many zones. The Ocean basins are characterised by four relief Zones i. e. continent shelves (areas submerged under oceanic water with average depth of 100 fathom & gentle slope toward the sea), Continental slop

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Question number: 8

» Oceanography » Currents and Tides

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Essay Question▾

Describe in Detail

Explain the formation and classification of tides? Why does moon had much important role to play than sun in understanding the tidal impact?

Explanation

  • The Rise and fall of seawater due to gravitational forces (centripetal) of the sun and moon are called tides. The difference between high tide water (Rise of seawater and its movement towards the coast) and low tide water (fall of water & movement towards the sea) is called tidal range.
Image of Gravitational interaction between sun & moon

Image of Gravitational Interaction between Sun & Moon

Image of Gravitational interaction between sun & moon

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Question number: 9

» Oceanography » Sea-Level Changes

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Essay Question▾

Describe in Detail

Explain the idea of sea floor spreading as propounded by Henry Hess and the evidences in support of it.

Explanation

In the early Henry Hess proposed sea-floor spreading hypothesis.

Continental drift along with sea floor spreading formed theory of plate tectonics. According to this theory when oceanic plates diverge, Sea floor spreading occurs & resulting magma from rift zone spread on the surface to create new sea floor.

When oceanic

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