[Mission 2022] QUIZ – 2020: INSIGHTS STATIC QUIZ , 18 October 2021 – Geography

Solution: d)

Evidence in Support of the Continental Drift

• The Matching of Continents (Jig-Saw-Fit): The shorelines of Africa and South America facing each other have a remarkable and unmistakable match.
• Rocks of Same Age Across the Oceans: The belt of ancient rocks of 2,000 million years from Brazil coast matches with those from western Africa.
• Tillite: It is the sedimentary rock formed out of deposits of glaciers. The Gondawana system of sediments from India is known to have its counter parts in six different landmasses of the Southern Hemisphere. Overall resemblance of the Gondawana type sediments clearly demonstrates that these landmasses had remarkably similar histories.
• Placer Deposits: The occurrence of rich placer deposits of gold in the Ghana coast and the absolute absence of source rock in the region is an amazing fact. The gold bearing veins are in Brazil and it is obvious that the gold deposits of the Ghana are derived from the Brazil plateau when the two continents lay side by side.

Solution: b)

Savannah climate:

• This type of climate has alternate wet and dry seasons. There are Only two seasons – winter and summer. Rains occur in summer. Due to distinct wet and dry periods, many Savanna areas have poor lateritic soils which are incapable of supporting good crops.
• Many tribes live in savanna region. Tribes like the Masai tribes of the East African plateau are pastoralists whereas Hausa of northern Nigeria are settled cultivators.

Solution: d)

Carbon dioxide readily dissolves in water and the oceans provide a huge reservoir of carbon. Across the world’s oceans there is a continual cycle of equilibration of dissolved carbon dioxide in water with carbon dioxide in the atmosphere.

The difference in partial pressure of the CO₂ between seawater and air facilitate gaseous exchange. This allows atmospheric CO2 to dissolve in seawater.

The carbon dioxide which dissolves in our oceans occurs in three main forms. Aside from the normal carbon dioxide form, it is also found as bicarbonate and carbonate ions.

Most exists as bicarbonate with carbonate ions acting as the link between carbon dioxide and bicarbonate.

As concentrations of carbon dioxide increase the supply of carbonate ions becomes limited and so the oceans become less and less able to take up carbon dioxide from the atmosphere.

Solution: a)

These are some of the important passes of Western Ghats.

• Thal Ghat: It links Nasik to Mumbai.
• Bhor Ghat: It links Mumbai to Rune.
• Pal Ghat: It connects Kerala to Tamil Nadu (link Kochi to Chennai).
• Senkota pass: It is located between the Nagercoil and the Cardmom hills links Thiruvanathpuram and Madurai

Solution: d)

It is opined that in due course of time Indo– Brahma river was dismembered into three main drainage systems: (i) the Indus and its five tributaries in the western part; (ii) the Ganga and its Himalayan tributaries in the central part; and (iii) the stretch of the Brahmaputra in Assam and its Himalayan tributaries in the eastern part.