Saturday, March 16, 2019

Definition of atmosphere


Earth
God loves the earth with some of the features of other planets to become suitable for the living organisms, it is strategically located for the sun, allowing the appropriate amount of sunlight, the radiation provides warmth to the surface of the earth and make the temperature on the surface moderate, and help the plants in the process Daytime photosynthesis and the production of food for growth. These plants are a source of food for humans and animals. They are characterized by the presence of water necessary for the life of all living organisms and can not live without it. It is surrounded by a shelter that protects it and provides suitable conditions for life. To define the atmosphere, its components and its importance.



Definition of atmosphere
It is a group of gases that surround a body with enough mass, and these gases remain in place because of the attractiveness of that body, and the planet has an atmosphere of air consisting of a group of gases are: nitrogen by 78% and oxygen by 21%, and a small amount of carbon dioxide Helium, hydrogen and neon.
Offers atmosphere:
Protection of the surface of the earth from harmful radiation emitted by the sun, the gases in which it absorbs.
Maintain the temperature of the surface to be suitable for the living organisms, where there is a homogeneity between the temperatures during the night and day and there are no differences can not be tolerated.
Oxygen is necessary to breathe living organisms.
Helps in the formation of weather and climate, it works to prevent the gathering of a lot of hot air in one place, causing storms and rain.
Protection from the fall of meteorites and meteors, as it reduces the speed of its impact on the ground is not destructive.
Terrestrial atmosphere layers
The troposphere: The first layer of the earth's surface, where weather fluctuates, rises about eight kilometers in the polar region, and eighteen kilometers above the equator, the thickest layer, separating it from the layer that follows it.
Stratosphere: It is the second layer and is fairly stable for use by aircraft when flying, and contains the ozone layer so called the "ozone layer".
The mesosphere: It is specialized in the destruction of meteorites and meteors that are moving towards the earth, and low temperatures.
The thermosphere: the class in which space travel and space shuttle travel. This layer produces the phenomenon of polar twilight, with charged particles, helium gases and hydrogen.
Oxosphere: the last layer of the atmosphere where it merges with outer space, becomes very thin, and molecules become rare because of their escape into outer space.

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