hydrosphere & oceanography section 2 MCQ Questions & Answers Detailed Explanation

Question : 1

Sea water is saltier than rain water because

a) the air around the sea is saltish

b) sea animals are salt producing

c) rivers wash away salts from earth and pour them into the sea

d) sea beds have salt producing mines

Question : 2

Which one of the following pairs is not correctly matched?

a) Sunda strait — Java Sea and Indian Ocean

b) Palk strait — Mannar Gulf and Bay of Bengal

c) Davis strait — Baffin Sea and Atlantic Ocean

d) Dover strait — Arctic Sea and N. Atlantic Ocean

Question : 3

The ocean current different from the remaining three is

a) Peruvian

b) South Equatorial

c) Benguela

d) Brazilian

Question : 4

Where is ‘Ninety East Ridge’ situated?

a) Arctic Ocean

b) Atlantic Ocean

c) Pacific Ocean

d) Indian Ocean

Question : 5

Which one among the following rivers is the longest?

a) Lena

b) Congo

c) Amazon

d) Amur

Question : 6

The most important fishing grounds of the world are found in the regions where

a) continental shelf is undulating

b) warm and cold oceanic currents meet

c) warm and cold atmospheric currents meet

d) rivers drain out large amounts of freshwater into the sea