Layers Of The Atmosphere Essay

Layers Of The Atmosphere Essay-90
Fortunately, that same pressure also exists inside us pushing outward; otherwise we would be crushed by the mass of air around us.Gravity compresses air, making it denser near Earth's surface; it thins rapidly with increasing altitude. Using chemical composition as a criterion, the atmosphere divides into two broad regions, the heterosphere (80 to 480 km altitude) and the homosphere (Earth's surface to 80 km altitude).The atmosphere above 10 km is called the stratosphere, followed by the mesosphere.

The principal substance of this atmosphere is air, the medium of life as well as a major industrial and chemical raw material.

Air is a simple mixture of gases that is naturally odorless, colorless, The weight (force over a unit area) of the atmosphere, or air pressure, pushes in on all of us.

At heights of above 80 km (50 miles), in the thermosphere, the atmosphere is so thin that free electrons can exist for short periods of time before they are captured by a nearby positive ion.

The number of these free electrons is sufficient to affect radio propagation.

Let us find out more about layers of atmosphere and the importance of air. Usually, air is colorless, odorless, tasteless and it cannot be seen. It is a mixture of about 78% nitrogen, 21% oxygen, 0.9% argon, 0.04% carbon dioxide, and very small amounts of other gases. This pollution causes various problems including acid rain and global warming. The thermosphere is the layer of the Earth’s atmosphere directly above the mesosphere.

Before discussing Layers of Atmosphere in detail let us have a look at Importance of Air first. The outermost layer of the atmosphere is the exosphere and it fades in the space. It extends from mesopause and consists of two layers (a) Ionosphere and (b) Exosphere.

The climate of an area is affected by its latitude, terrain, and altitude, as well as nearby water bodies and their currents.

Climates can be classified according to the average and the typical ranges of different variables, most commonly temperature and precipitation. The narrow band of land, water, and air where all kinds of life are possible is known as: Sol. The biosphere is the narrow band of land, water, and air where all kinds of life are possible.

Mesosphere layer lies above the stratosphere and extends to a height of 90 km from ground level.

This temperature in this layer decreases with height and reaches a minimum of The troposphere is the lowermost and densest layer.


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