Question

1. Meaning of atmosphere.
2. Composition of atmosphere.
3. Importance of atmosphere.

It is a question about GEOGRAPHY...​

Answer 1

Answer:

1)Atmosphere is a layer or a set of layers of gases surrounding a planet or other material body, that is held in place by the gravity of that body.

2)Nitrogen — 78 percent. Oxygen — 21 percent. Argon — 0.93 percent. Carbon dioxide — 0.04 percent.

3)The atmosphere is an important part of what makes Earth livable. It blocks some of the Sun's dangerous rays from reaching Earth. It traps heat, making Earth a comfortable temperature. And the oxygen within our atmosphere is essential for life

Answer 2

1. Meaning of Atmosphere:-

the envelope of gases surrounding the earth or another planet.

2. Composting of Atmosphere

a) Nitrogen — 78 percent

b) Oxygen — 21 percent

c) Argon — 0.93 percent

d)Carbon dioxide — 0.04 percent

e) Trace amounts of neon, helium, methane, krypton and hydrogen, as well as water vapour.

3. Importance of Atmospher:-

1- Protection against the sun's rays

The ozone layer protects life on earth from the harmful effects that excess solar rays can have.

2- Filter of the solar radiation

The first leak occurs 88 kilometers from the Earth's surface, where the atmosphere absorbs X-rays and some ultraviolet radiation.

When entering dense layers of the atmosphere, the process of diffuse reflection (Ralleigh scattering) is produced which deflects the visible rays of light giving the sky its blue color.

3- It allows climates

The troposphere is the layer of the atmosphere that allows the existence of the climate. Without it we would not have the rains and many life cycles could not function properly.

4 - Allows radio waves to circulate

The ionosphere allows the transmission of radio waves. The short waves are reflected in the layer of Appleton (150-220 km) and long waves in the one of Kennely-Heaviside (90-135 km).

5- Temperature balance

The atmosphere also thermally balances the earth's surface. Through the atmospheric circulation, mechanisms are put in place that balance the thermal and pressure differences that occur on the different latitudes of the earth.

6- It allows the changes of station

Atmospheric pressure, ie the weight exerted by the different atmospheric layers on the earth's surface, is the main cause of the formation of different air masses with different properties that give dynamism to the atmosphere and cause Changes in climate , Causing seasonal changes, storms, cyclones, hurricanes and droughts.

7- Protect life on Earth

The atmospheric imbalance endangers life on Earth: the increase in the proportion of Contaminants in the atmosphere , Especially chlorine gases, called chlorofluorocarbons (CFCs), cause the process of oxygen decomposition and the creation of ozone in the atmosphere to be altered.

These gases contribute to the production of a hole in the atmospheric ozone layer, which in turn increases the proportion of solar rays that come into contact with the Earth's surface.