Question 4

(i) Some rocks have a shape of a mushroom.
(ii) Flood plains are very fertile.
(iii) Sea caves are turned into stacks.
(iv) Buildings collapse due to earthquakes.

Answer

(i) In desert, wind is an active agent for soil erosion which erode the lower section of the rock more than the upper part of the rock. Therefore, some rocks have a shape of a mushroom which contain narrower base and wider top.

(ii) Flood plains are very fertile because floods deposit layers of fine soil and other material which is known as sediments which is ideal for cultivation along with its banks.



(iii) When cavities in sea caves become larger, only the roof of the caves remain forming sea arches. Further, erosion breaks the roof and only walls are left which forms the stacks.

(iv) During earthquakes, vibrations travel outwards from the epicenter as waves and propagate through the surface of the earth which produces sudden movements which leads to the collapse of buildings.

Popular Questions of Class 7 Social Science - Our Environment (Geography)

Recently Viewed Questions of Class 7 Social Science - Our Environment (Geography)

Write a Comment: