The Earth's Atmosphere
Earth has a light blue sky at day time, and a dark blue sky with stars in it is at night time, but what we don't see are the five layers of earth. Earth has five layers of the atmosphere to protect the nature and people of the Earth. These five layers protected us for many many years. I will help you learn about them. These five layers are
Living at the surface of the Earth, we are usually only aware of the events happening in the lowest layer, the troposphere, where all weather occurs. The base of this layer is warmer than its top because the air is heated by the surface of the Earth, which absorbs the Sun’s energy
Above the troposphere lies the stratosphere where jet airplanes fly. Temperatures increase with altitude because of increasing amounts of ozone. The ozone layer within the stratosphere absorbs harmful ultraviolet rays of sunlight.
As the mesosphere extends upward above the stratosphere, temperatures decrease. The coldest parts of our atmosphere are located in this layer and can reach –90°C.
In the forth layer from Earth’s surface, the thermosphere, the air is thin, meaning that there are far fewer air molecules. The thermosphere is very sensitive to solar activity and can heat up to 1,500°C or higher when the Sun is active making an aurora that lights up the night sky. Astronauts orbiting Earth in the space station or space shuttle spend their time in this layer.
The upper layer of our atmosphere, where atoms and molecules escape into space, is called the exosphere.