What is the sky
What is the sky
The sky is defined
as that which corresponds to the surface of the earth to the top and thus has
included many parts of the universe,but it can be defined more clearly as the
area that corresponds to the surface of the earth, from sea level to a height
of 100 km, which is an area called the Carmen Line, which is the boundary
between The sky and space, so that this is the boundary in one of the layers of
the atmosphere.
Why is the sky blue?
Gases and
particles surround the globe with the problem of the atmosphere or what is
known as the sky, especially the gases of nitrogen and oxygen, and these gases
are known to be invisible, but when the sun's rays penetrate the atmosphere,
they are exposed to the gas molecules that make up it, and thus those particles
analyze the white light that contains what It is called the colors of the
spectrum of different wavelengths, then these gases absorb the wavelengths of
colors such as red and green except for those related to the blue color, which
only reflects them, which gives that blue color to the sky.
Layers of the atmosphere
The atmosphere
extends from the surface of the earth up to the space in the form of layers,
each of which has certain characteristics, and therefore the sky joins the
atmosphere but only certain layers, and among the most important layers of the
atmosphere that represents the sky are the following
The troposphere
It is considered
the first layer of the atmosphere, which extends from the surface of the land
to a height of 10 km, and it is the layer in which climate changes occur and
directly touch the surface of the earth, and thus living organisms live in this
layer.
Stratosphere
It is considered
the second layer of the atmosphere and extends up to 50 km above the surface of
the earth, and this layer contains the so-called ozone layer that absorbs
ultraviolet light from the sun's rays, and it is characterized by high
temperatures with increasing altitude.
The mesosphere
The mesosphere is
located directly above the stratosphere, so that its distance from the earth
reaches 85 km, and it has approximately 1% of the atmospheric pressure present
at the surface of the sea, and this layer is also characterized by the burning
of most of the meteors in it, and unlike the stratosphere, its temperatures
decrease with the increase in height in it . After that, the layers of the
atmosphere are considered from within outer space, so that there are three
other layers which are the thermosphere, the exosphere, and the inosphere,
which reach a height of 190 km above the surface of the earth, and these layers
have characteristics that differ from the properties of the layers of the
atmosphere known as the Earth's sky, so that they have radioactive and ionic
properties. And the lack of gravity.
Written by Suhaib
Khaza'leh
Mawdoo3
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