explain layers of atmosphere.
Answers
Layers of the atmosphere. The atmosphere is comprised of layers based on temperature. These layers are the troposphere, stratosphere, mesosphere and thermosphere. A further region at about 500 km above the Earth's surface is called the exosphere.
Explanation:Troposphere: It is the undermost layer of the earth’s atmosphere. At the base of the troposphere, the air is warmer. Density and air pressure also decrease with the altitude.
Stratosphere: It is the 2nd layer of the atmosphere. It occurs at an altitude of fifty kilometres.
Mesosphere: It lies beneath troposphere and above the stratosphere. Temperature decreases with the altitude.
Thermosphere: It extends to six hundred kilometres high. Aurora and satellites occur in this layer. It starts just above the mesosphere.
The ionosphere is an abundant layer composed of ionized atoms, molecules and electrons that expand from about forty-eight kilometres above the surface overlapping into the mesosphere and thermosphere.
The exosphere is the upper limit of earth’s atmosphere. It extends from the top of the thermosphere up to 10,000 km