hydrosphere & oceanography section 6 MCQ Questions & Answers Detailed Explanation

Question : 1

The largest current, because of its dark waters is known as the ‘black current’ and that is :

a) Antarctic Current

b) California Current

c) Gulf Stream

d) Kuroshio Current

Question : 2

Which among the following statements characterized EI Nino?

1. It occurs at irregular intervals
2. It carriers warmer water
3. It carries less saline water
4. Its atmospheric equivalent is southern oscillation.

a) 1, 2, 3 and 4

b) 3 and 4 only

c) 1 and 2 only

d) 2 and 3 only

Question : 3

The riverbank is weakest where the river turns. This is because water

a) reacts more effectively with the bank at a turn

b) flows faster as it turns

c) gets concentrated on the inner bank of the turn, making it denser

d) effectively bounces off the outer bank as it turns exerting an extra pressure on the bank

Question : 4

Which one among the following is a sea without having a coastline?

a) Bering sea

b) Baltic sea

c) North sea

d) Sargasso sea

Question : 5

Identify the correct statement regarding variation in density of ocean water and air at the same temperature—.

a) Ocean water is 200 times more denser than air.

b) Ocean water is 400 times more denser than air.

c) Ocean water is 800 times more denser than air.

d) Ocean water is 600 times more denser than air.

Question : 6

Spring Tide occurs

a) When the night is very cold

b) When a strong wind blows

c) When the Sun, the Earth and Moon are in a straight line

d) When the Sun and Moon make a right angle