hydrosphere & oceanography section 2 MCQ Questions & Answers Detailed Explanation

Question : 1

Arrange the following features formed by rivers in its course starting from upstream:

1. Meanders
2. Falls
3. Delta
4. Oxbow Lake

a) 1 – 4 – 2 – 3

b) 1 – 2 – 3 – 4

c) 2 – 1 – 3 – 4

d) 2 – 1 – 4 – 3

Question : 2

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

Question : 3

Which one among the following rivers is the longest?

a) Lena

b) Congo

c) Amazon

d) Amur

Question : 4

Which one is the most extensive part of the oceanic floor?

a) Deep Sea Plains

b) Oceanic Shelves

c) Ocean Deeps

d) Oceanic Slope

Question : 5

Among oceanic trenches the deepest trench is

a) Tonga trench

b) Mariana trench

c) Kurile trench

d) Japan trench

Question : 6

When water freezes in the polar seas the salts

a) partly freeze and partly sink to the bottom

b) sink to the bottom

c) form a layer on top

d) remain in the sub-surface water that does not freeze