Table of Contents
Why is the Earth divided into four layers?
The Earth’s atmosphere is made up of gases. It is less dense than the Earth’s crust, which is a solid. This is why the Earth’s surface and atmosphere form distinct layers.
What is the importance of the various atmospheric layers?
They are the following from top to bottom (near the surface): Exosphere, Thermosphere, Mesosphere, Stratosphere and Troposphere. These five different layers provide protection and also make life possible because of the constituent gases which state the significance and importance of atmosphere.
How is each layer of the atmosphere different?
The different layers of the atmosphere. The atmosphere can be divided into layers based on its temperature, as shown in the figure below. These layers are the troposphere, the stratosphere, the mesosphere and the thermosphere. A further region, beginning about 500 km above the Earth’s surface, is called the exosphere.
What atmosphere is divided into two layers?
Based on chemical composition, the atmosphere is divided into two broad layers: the homosphere and the heterosphere. The homosphere extends up to the height of 56 mi. (90 km.) and is characterised by uniformity in chemical composition.
What is the basis for dividing the atmosphere into four?
Background Information: The atmosphere can be divided into four layers based on temperature differences. The layer closest to the Earth is called the troposphere. Above this layer is the stratosphere, followed by the mesosphere, then the thermosphere.
Why is mesosphere important?
The mesosphere is very important for earth’s protection. The mesosphere burns up most meteors and asteroids before they are able to reach the earth’s surface. The mesosphere is the coldest atmospheric layer surrounding the earth. It becomes cold enough to freeze water vapour in its atmosphere into ice clouds.
Why is the situation in the troposphere defined as unstable?
The situation in the troposphere is defined as unstable because the reaction of the natural atmospheric phenomenon like climate, temperature, humidity, rainfall etc. are not realists predictable and stable. And all weather and atmospheric activities (thunder, storm, rainfall, clouds formation etc.)
What determines the layers of the atmosphere?
The atmosphere has five different layers that are determined by the changes in temperature that happen with increasing altitude . Troposphere 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.
What are the four layers of the atmosphere in order?
In order from lowest to highest, the following are the four major layers of the atmosphere: In order from lowest to highest, the following are the four major layers of the atmosphere: the troposphere, stratosphere, mesosphere, and thermosphere.
What is the hottest and coldest layer of the atmosphere?
The MESOSPHERE is the coldest layer and the THERMOSPHERE is the hottest layer in the atmosphere.
What is the highest layer of the atmosphere?
The exosphere is the highest layer of the atmosphere. It extends up to 10,000 km (6,200 miles; 33,000,000 ft.) above the Earth. Satellites orbit the Earth in the exosphere. The atmosphere in this layer is extremely thin and atoms and molecules of air are constantly escaping into outer space.