. The ‘graded profile’ of a river course is a

(1) smooth curve from source to mouth.

(2) smooth curve in the upper course.

(3) smooth curve in the middle course.

(4) smooth curve in the lower course.

Sink hole is a phenomenon of _______ topography.

(1) Plain

(2) Desert

(3) Tundra

(4) Karst

Earthquakes are caused by

(1) Denudation

(2) Tectonism

(3) Earth revolution

(4) Earth rotation

The earth completes one rotation on its axis in :

(1) 23 hrs. 56 min. 4.9 sec

(2) 23 hrs. 10 min. 2 sec

(3) 23 hrs. 30 min.

(4) 24 hrs

Granite, quartzite areas have upstanding look because

(1) mechanically weathered faster

(2) these rocks are resistant to all kinds of erosion

(3) these rocks are not easily crowded

(4) not easily worn down

In mountainous areas a natural cause for roadblocks is often :

(1) road repairs and construction

(2) landslides

(3) tree felling

(4) traffic congestion

Which of the following refers to the white salt which covers the land in some areas during the dry season?

(1) usar

(2) reh

(3) erg

(4) reg

Meanders are the features formed by

(1) glaciers

(2) rivers

(3) winds

(4) ocean waters

Uneven distribution of insolation on the earth is mainly due to the

(1) spherical shape of the earth

(2) distribution of land and water

(3) direction of the winds

(4) presence of pressure belts

An equinox occurs when the sun is vertically above _____

(1) Tropic of Capricorn

(2) Tropic of Cancer

(3) Poles

(4) Equator

An Equinox is when:

(1) Day and night are of equal length

(2) Day is of the shortest duration during the year

(3) Day is of the longest duration in the year

(4) Day when maximum rainfall of the year occurs