hydrosphere & oceanography section 3 MCQ Questions & Answers Detailed Explanation

Answer: (c)

East Australian current is a warm ocean current that moves warm water from the tropical Coral Sea, where it splits from the South Equatorial Current, down the east coast of Australia.

Answer: (d)

Answer: (b)

The Jeans-Jeffreys tidal hypothesis, championed by James Jeans and Harold Jeffreys, explained the origin of the solar system as a result of a close encounter between the Sun and a second star.

However, it differed significantly from the other major catastrophic hypothesis of the 20th century, the Chamberlin-Moulton planetesimal hypothesis.

Answer: (b)

Answer: (d)

A strait is a narrow, typically navigable channel of water that connects two larger, navigable bodies of water.

It most commonly refers to a channel of water that lies between two landmasses, but it may also refer to a navigable channel through a body of water that is otherwise not navigable, for example, because it is too shallow, or because it contains an unnavigable reef or archipelago.

Answer: (d)

The term “coral reef” generally refers to a marine ecosystem in which the main organisms are corals that house algal symbionts within their tissues.

These ecosystems require:

1. fully marine waters;
2. warm temperatures; and
3. ample sunlight.

They are therefore restricted to shallow waters of tropical and subtropical regions.