Oceanography - Geography Objective Questions and Answers | Geography gkseries mcqs | page7

Answer: Option [A]

Waves approaching the shore is known as Tsunami. Tsunamis have a small amplitude (wave height) offshore, and a very long wavelength (often hundreds of kilometers long, whereas normal ocean waves have a wavelength of only 30 or 40 metres), which is why they generally pass unnoticed at sea, forming only a slight swell usually about 300 millimetres above the normal sea surface. They grow in height when they reach shallower water or the coast.

Answer: Option [C]

Atoll is a kind of inland sea. Atoll is a coral island (or islands) that encircle a lagoon partially or completely. It is formed when the island sinks below the sea, and the barrier reef becomes an atoll enclosing an open lagoon. So in a way it is a kind of inland sea which is a shallow sea that covers central areas of continents during periods of high sea level.

Answer: Option [D]

The correct answer is Continental shelf. The continental shelf is the extended perimeter of each continent and associated coastal plain. The shelf usually ends at a point of increasing slope (called the shelf break). The sea floor below the break is the continental slope.

Answer: Option [A]

The correct answer is Kuroshio. The Kuroshio Current, also known as the Black or Japan Current or the Black Stream, is a north-flowing, warm ocean current on the west side of the North Pacific Ocean basin.

Answer: Option [C]

The term territorial water means water of the sea located close to the coast of a country. The term territorial waters is sometimes used informally to refer to any area of water over which a sovereign state has jurisdiction, including internal waters, the territorial sea, the contiguous zone, the exclusive economic zone, and potentially the extended continental shelf.