Nitrogen gas found in atmosphere is 78%, oxygen is 21%
Speed of electromagnet ways is 300000 km/sec
The layer of earth in which we live is Troposphere
The atmospheric layer closet to earth is Troposphere.
Weather phenomenon take place in Troposphere
Atmospheric layer ideal for flying is Troposphere
Ionosphere reflects radio-waves back to earth
Nimbostratus clouds bring a long steady rain
Clouds found at highest altitude are Noctilucent
Thickness of atmosphere around earth is 145 km
Atmosphere maintains earth’s temperature
% of insulation received by earth’s surface is 51%
Atmospheric layers are divided into 4 parts
Sun’s heat and energy reaches earth by Radiation
Air is composed of 78% Nitrogen.
21% Oxygen.
1% other gases.
Troposphere is 10 km, Stratosphere is from 10 to 40 km,
Mesosphere (Neutraspace) is from 40 to 80 km, Thermosphere (Ionosphere) is from 80 to 370 km and Exosphere (Heaviside) is beyond 370 km.
Megnetosphere that lies beyond the Exosphere is not the part of atmosphere.
3/4th of the air that envelops the earth is in troposphere.
97% of the air is below the upper boundary of the stratosphere, which is the maximum height that aircraft may reach with the support of air.
Smog is when water vapour condenses around a particle of smoke
Atmospheric temperature increases at higher altitudes due to convection
Formaula of Ozone is O3
CFCs are Chloro Fluoro Carbons
Earth’s atmosphere is over 1000 km deep
Biosphere is the sphere of life which covers all the three spheres i.e litho, hydro, atmosphere
Ozone layer is found in Stratosphere.
Climate is the average weather of a particular place over many years. Weather change day to day, whereas climate remains same for years.
Every seson, trees add a new ring of growth to their trunks
Clouds are made of water droplets, ice, crystals, particles of dust and air
Warm air can hold more water vapour than cold air
The age of Earth is calculated as 4500 million years.
Ozone is measured in percentage (chk)
The amount of ozone in the atmosphere is expressed in ppm/
The amount of ozone in the atmosphere is expressed in dobson units (Check it)
Air is composed of nitrogen (78.08%), oxygen (20.95%), argon (0.94%) and carbon dioxide (0.03%).
Nitrogen gas dominates the earth’s surface.
Weathering takes place more quickly in warm, wet area than in cold and dry regions.
An atmosphere is a blanket of gas that surrounds a plane.
Earth’s atmosphere is over 1000 kilometers deep, but most of it is in the 30 kilometers closest to Earth.
Weight of the air pushing on us is known as atmospheric pressure.
Atmospheric pressure is equal to 14.73 lbs per sq. inch.
Atmospheric pressure decreases with height.
In nature the nitrogen of the atmosphere is made available for the plant growth through the activity of bacteria called nitrogen fixation of bacteria in roots of plants. Earthworms provide nitrogenous wastes.
Ozone is found in stratosphere b/w 20 to 50 km.
The tidal effect of Moon on the surface of Earth is less that that of Sun because Moon’s gravitational pull at Earth’s surface is less as compared to Sun’s gravitational pull. Tidal effect of sun is 146% of moon.
Injurious ultraviolet radiations are mostly prevented from reaching the earth as these are absorbed mostly by Ionosphere
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