[Mission 2022] QUIZ – 2020: INSIGHTS STATIC QUIZ , 16 October 2021 – Geography – INSIGHTSIAS

Solution: a)

The rocks equidistant on either sides of the crest of mid-oceanic ridges show remarkable similarities in terms of period of formation, chemical compositions and magnetic properties. Rocks closer to the mid-oceanic ridges have normal polarity and are the youngest. The age of the rocks increases as one moves away from the crest.

Solution: b)

The western cyclonic disturbances are weather phenomena of the winter months brought in by the westerly flow from the Mediterranean region. They usually influence the weather of the north and north-western regions of India.

Tropical cyclones occur during the monsoon as well as in October -November, and are part of the easterly flow.

Solution: d)

The oceans below the photic zone are a vast space, largely dependent on food from photosynthetic primary producers living in the sunlit waters above.

This is because phytoplanktons (primary production) require abundant sunlight and nutrients to grow well.

Solution: c)

• The Bhangar is the older alluviumalong the river beds forming terraces higher than the flood plain.
• The terraces are often impregnated with calcareous concretions known as ‘KANKAR’.
• ‘The Barind plains’ in the deltaic region of Bengal and the ‘bhur formations’ in the middle Ganga and Yamuna doab are regional variations of Bhangar.
• [Bhur denotes an elevated piece of land situated along the banks of the Ganga river especially in the upper Ganga-Yamuna Doab. This has been formed due to accumulation of wind-blown sands during the hot dry months of the year]
• The Khadar is composed of newer alluvium and forms the flood plains along the river banks.

Solution: a)

Usually, large Rivers flowing on the peninsular plateau have their origin in the Western Ghats and discharge their waters in the Bay of Bengal.

Indus, Tapti, Mahi, Narmada and Sabarmati drain in the Arabian Sea. Subarnrekha, Penner and others drain in the Bay of Bengal.