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Indian Geography Test 5
Read Instructions for the test.
Negative marks are -0.33 per wrong answer
Right answer is 1 mark
No time limit but finish in 30 mins
Solution can be found at below chapters:
Test series is based on following chapters.
Indian Geography Chapter 6: OCEANOGRAPHY
Indian Geography Chapter 7: ISLANDS
Q1: Which is true ?
Ocean crust isn't uniform or flat
It has higher diversity than continental crust.
It is highly dense, thick crust and basaltic.
Q2: Continent Shelf
This is the seaward extension of the continent from the shoreline to the continental edge
They are absent on mountainous coasts and are widest in shores of lowland coasts
The continental shelf formation may be by submerging of continental edges due to rising water levels or by water erosion
Q3: Properties of continental shelf
They are responsible for preventing cold under current from rising and also increase the height of tides.
They are excellent location for ports
Q4: richest fishing grounds of the world are
Q5: Characteristics of continental shelves are
It is shallow part of ocean and connected to the continent.
It has highest bio diversity.
Light reaches the bottom and hence aquatic plants are found.
Q6: Resources in continental shelf
90% of petroleum reserves are found in shelves.
Sulfur metal rarely found on land but is abundant in continental shelf due to marine volcanism.
Concentration of heavy metals on shelf. E.g.: Monazite sand [thorium], gold, silver and diamonds.
Massive slope at the end of the shelf.
Landfalls of terrestrial deposits.
Great rivers form canyons, underwater waterfalls
Q8: Continental Rise
Transition between ocean block and continental block.
Absent near trenches as trenches consume the depositional material of the continental rise.
Q9: Abyssal plains:
Occupies 2/3rd of the ocean floor
High diversity in types of landforms and deposits from continental and aquatic sediments.
Q10: UN Convention on laws of seas
Decides deep sea mining, environment protection, maritime boundary and dispute settlement.
As per the convention, territorial sea is 12 miles from coast, 24 miles is contiguous zone and 200 miles is the exclusive economic zone
state can explore minerals and produce energy in EEZ
Q11: Resources from an abyssal plain
Poly metallic nodules
both a and b
Q12: Continental islands
These islands were formally a part of the mainland and now detached from the continent by a shallow lagoon or a deep channel
islands formed due to coral activity
both a and b
volcanic activity creates them
Q13: Continental islands are of types
Q14: Oceanic islands
isolated islands that lay thousands of miles away from the mainland.
They have flora and fauna different from the nearest mainland.
They are usually sparsely populated but are useful stops for the aeroplanes and steamers.
Q15: Coral reefs
Sources of greatest biodiversity amongst marine ecosystems
They are indicative of the health of the marine ecology. Cant survive in muddied waters or polluted water. They need sediment free water.
Q16: Characteristics of coral reefs
Corals are tiny fleshy sea anemones. They extract calcium from the sea and form skeletons to protect their bodies.
They have a symbiotic relationship with microscopic plant Zoantharia which are photosynthetic in origin.
Q17: Conditions needed for coral reefs
Shallow platform where sunlight reaches
Warm, tropical and low latitude waters.
Q18: Reasons for coral bleaching
Global warming and ozone depletion
Ocean acidification, Algal bloom
Marine pollution and oil spills.
Q19: Types of coral reefs
Q20: Fringing reef
coral reef is formed bordering an island or continent
A distance is created between island and the reef
Here small water bodies are seen to form called lagoons.
Q21: Barrier reef
reef isn’t continuous but broken
The lagoons can connect to ocean.
the coral reef if formed parallel to the coast
Q22: Subsidence Theory by
Q23: Subsidence Theory by Darwin states
All reefs started as fringing reefs of islands or top of volcanoes that emerge out of sea bed
these fringing reefs continue to grow upwards
Finally a barrier reef is formed and this becomes an atoll as the inner island is completely submerged due to the down warping.
Q24: Steps in reef formation in order are
fringing , barrier, atoll
barrier, fringing, atoll
Q25: Glacial Control theory is by
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