hydrosphere & oceanography section 5 MCQ Questions & Answers Detailed Explanation

Answer: (d)

Answer: (b)

The Sunderban forest lies in the vast delta on the Bay of Bengal formed by the super confluence of the Padma, Brahmaputra and Meghna rivers across southern Bangladesh. The seasonally flooded Sundarbans freshwater swamp forests lie inland from the mangrove forests on the coastal fringe.

The forest covers 10,000 km². of which about 6,000 are in Bangladesh. It became inscribed as a UNESCO world heritage site in 1997.

Answer: (c)

Continental Shelf is a gentle seaward sloping surface extending from the coasts towards the open sea. In all, about 7.5% of the total area of the oceans is covered by continental shelves.

The shelf is formed by the drowning of a part of a continent with a relative rise in sea level or marine deposition beneath the water.

Answer: (d)

Answer: (b)

Answer: (a)

The equator subdivides it into the North Pacific Ocean and South Pacific Ocean, with two exceptions: the Galápagos and Gilbert Islands, while straddling the equator, are deemed wholly within the South Pacific.

The Mariana Trench in the western North Pacific is the deepest point in the world, reaching a depth of 10,911 metres (35,797 ft).