The troposphere is the hottest part of the atmosphere because

(1) it is closest to the Sun

(2) there are charged particles in it

(3) it is heated by the Earth’s surface

(4) heat is generated in it

The lowest layer of the atmosphere is :

(1) Stratosphere

(2) Thermosphere

(3) Troposphere

(4) Mesosphere

The zone of Earth’s atmosphere immediately above its surface up to a height of about 16 kms above the equator and 8 kms over the poles is known as :

(1) Mesosphere

(2) Thermosphere

(3) Troposphere

(4) Stratosphere

Which one of the following is called “Roaring Forty”?

(1) Winds blowing in the southern hemisphere between 400– 600 S

(2) Winds blowing in the northern hemisphere between 400– 600 N

(3) Very cold winds which blow in winters

(4) Very hot and fast blowing summer winds

Airmass near to the earth’s surface is warmer because it

(1) radiates heat

(2) contains dust particles

(3) is warmed by terrestrial radiation

(4) is far from the sun

Which one of the following is called North-easter?

(1) Cold and fast-blowing winds in the northern hemisphere that move from sub-polar to polar regions

(2) Cold and fast-blowing winds in the South Pole region

(3) Cold and fast-blowing winds from the polar region in the northern hemisphere

(4) Winds blowing towards Kazakhstan in Central Asia

The density of the earth’s atmosphere is highest in the

(1) Troposphere

(2) Stratosphere

(3) Mesosphere

(4) Ionosphere

Which of the following absorbs part of the insolation and preserves the earth’s radiated heat?

(1) Oxygen

(2) Nitrogen

(3) Water vapour

(4) Carbon-di-oxide

Cyclones are caused due to

(1) low pressure

(2) high pressure

(3) low temperature

(4) high density

What is a ‘tornado’?

(1) A very high-pressure centre

(2) A very low-pressure centre

(3) A very high ocean wave

(4) A planetary wind

Katrina is the name given to _________

(1) Satellite

(2) Star

(3) Heat wave

(4) Hurricane