______ is the most important gas for the survival of living organisms.

(a)

Helium

(b)

carbon-di-oxide

(c)

oxygen

(d)

oxygen

_______  reflects radio waves

(a)

Exosphere

(b)

Ionosphere

(c)

Mesosphere

(d)

Stratosphere

The ________  is the chief energy source of the Earth.

(a)

Sun

(b)

Moon

(c)

Stars

(d)

Clouds.

All types of clouds are found in the _______ 

(a)

Troposphere

(b)

Ionosphere

(c)

Mesosphere

(d)

Exosphere

_____  is called the eye of the storm/cyclone.

(a)

Pressure

(b)

wind

(c)

cyclones

(d)

snow.

This gas helps in protecting the earth from radiation.

(a)

Hydrogen

(b)

Nitrogen

(c)

Ozone

(d)

CO₂

This is the earth's magnetic belt________

(a)

Thermosphere

(b)

Stratosphere

(c)

Mesosphere

(d)

Magnetosphere

Meteorology

(1)

rain shadow region

Climatology

(2)

study of climate

Wind Vane

(3)

direction of wind

Leeward side

(4)

Coil of a snake

Argon

(5)

0.93%

Cyclone

(6)

study of weather

Weather and climate

Land breeze and sea breeze

Tropical cyclone and Temperate cyclones.

Isobar and Isotherm.

The equatorial low pressure belt is an area of calm.

Fog is dangerous for traffic.

Polar Easterlies are cold and dry. Why it is so?

The sub-tropical high pressure are called "horse latitudes". Why?

Define atmosphere.

What is insolation?

Polar Easterlies are cold and dry. Why it is so?

How are clouds formed?

How are Cyclones classified?

What are Auroras?

Cuddalore and Nagapattinam are always affected by cyclones. Why?

Write a paragraph about the structure of the atmosphere.

How are clouds classified? Explain them.