The most abundant element in the Earth's atmosphere is

Agents of fog formation do not include ________

A. High relative humidity

B. Diurnal temperatures of short ranges

C. Winter season

D. Rapid radiation

Which one among the following forces is most powerful in determining movement of wind including its velocity ?

A. Gravitational force

B. Centrifugal force

C. Frictional force

D. Pressure gradient force

Atmospheric humidity is measured by ________

A. Psychrometer

B. Anemometer

C. Lysimeter

D. Hydrometer

Which is the warmest layer of the atmosphere?

A. Thermosphere

B. Troposphere

C. Stratosphere

D. Mesosphere