What process takes place during the youthful stage of a river?

(1) Valley widening

(2) River rejuvenating

(3) Valley deepening

(4) Meandering

Winds blowing constantly in one direction in rocky deserts form

(1) Chimneys

(2) Mushrooms rocks

(3) Yardangs

(4) Demoiselles

What is the mean temperature of Earth?

(1) 6 degree Celsius

(2) 16 degree Celsius

(3) 26 degree Celsius

(4) 36 degree Celsius

What is the position of the Earth when it is at the greatest distance from the sun?

(1) Aphelion

(2) Antipode

(3) Perihelion

(4) Aldiate

The deflection of the winds to the right in the northern hemisphere is caused by :

(1) revolution of the earth

(2) rotation of the earth

(3) uneven heating of the earth

(4) All the above

Atmospheric pressure exerted on earth is due to :

(1) rotation of the earth

(2) revolution of the earth

(3) gravitational pull

(4) the uneven heating of the earth

Which one of the following has the highest wind velocity?

(1) Typhoon

(2) Hurricane

(3) Cyclone

(4) Tornado

Speed of wind is measured by

(1) barometer

(2) hygrometer

(3) thermometer

(4)anemometer

Trade winds are due to

(1) Conduction

(2) Convection

(3) Radiation

(4) Scattering

Ozone-hole in the atmosphere is largely caused by the presence of

(1) Oxygen

(2) Hydrogen

(3) Chloro-fluoro-carbon

(4) Radio-active waste

The term Roaring Forties is related to the

(1) Trade winds

(2) Planetary winds

(3) Westerlies

(4) Polar winds