hydrosphere & oceanography section 3 MCQ Questions & Answers Detailed Explanation

Question : 1

Which of the following rivers crosses the Equator twice?

a) Amazon

b) Nil

c) Zaire

d) Niger

Question : 2

The biggest island of the Indian Ocean is

a) Sumatra

b) Lakshadweep

c) Maldives

d) Madagascar

Question : 3

Tsunamis are mainly produced by

a) Tides

b) Cyclones

c) Subaerial earthquakes

d) Submarine earthquakes

Question : 4

Consider the following statements.

1. Ocean currents are the slow surface movement of water in the ocean.
2. Ocean currents assist in maintaining the Earth’s heat balance.
3. Ocean currents are set in motion primarily by prevailing winds.
4. Ocean currents are affected by the configuration of the ocean.

a) 1, 2, 3 and 4

b) 1, 3 and 4

c) 1 and 2

d) 2, 3 and 4

Question : 5

“Tsunami” is the name given to which of the following?

a) Undersea Waves

b) Tidal Waves

c) Earthquake

d) Cyclone

Question : 6

In sea, plants are restricted up to the depth of

a) 2000 m

b) 1000 m

c) 20 m

d) 200 m