"it is warm and dusty,originates from the Sahara and reaches its lowest southern extent in the January". The above best describes the

A. Tropical Maritime airmass

B. Tropical Continental airmass

C. South Westerflies

D. Equatorial Easterlies

Heavy rainfalls are often associated with

A. cirrus clouds

B. cumulonimbus clouds

C. nimbostratus clouds

D. alto-stratus clouds

Which of the following gases is most abundant in the atmosphere?

A. oxygen

B. hydrogen

C. argon

D. nitrogen

Marble,slate and gneiss are

A. metamorphic rocks

B. sedimentary rocks

C. plutonic rocks

D. volcanic rocks

Which of the following is not a process of wind erosion?

A. abrasion

B. attrition

C. hydraulic action

D. deflation

Compressional forces are mainly responsible for the formation of

A. fold mountain

B. volcanic mountains and lava plateau

C. residual maountains and plants

D. block mountains

The instrument used for measuring the speed of wind is called

A. cup anemometer

B. speedometer

C. wind vane

D. prismatic compass

Coastal erosion can be prevented by

A. increasing the volume of water in the ocean

B. increasing the volume of water around the coast

C. the stabilization of sandy and muddy beaches by coastal vegetation

D. the removal of sandy and muddy beaches along the coast

Coastlines washed by cold currents normally have

A. high temperature

B. scanty rainfall

C. excessive rainfall

D. moderate rainfall

A continental shelf is economically important because it

A. is a good fishing ground

B. is good for irrigation

C. is very deep

D. constains little salt