Question

How many layers are found in the atmosphere?
A. 2
B. 3
C. 5
D. 4

Answer 1

Hint: The atmosphere comprises layers based on temperature. These primary layers are the troposphere, stratosphere, mesosphere, and thermosphere. A further region at about 500 km above the Earth's surface is known as the exosphere.

Complete answer: The Earth's atmosphere has four primary layers: the troposphere, stratosphere, mesosphere, and thermosphere. These layers conserve our planet by consuming harmful radiation.
1.) Thermosphere- this layer is 53–375 Miles and has molecules of oxygen and nitrogen bombarded by radiation and energetic particles from the Sun. This causes the molecules to split into their component atoms and create heat. The thermosphere increases temperature with altitude because the atomic oxygen and nitrogen cannot radiate the heat from this absorption.
2.) Mesosphere. It is at 31–53 Miles and is essential to understand long-term changes in the Earth's atmosphere and how these changes affect climate. The mesosphere is responsive to small changes in atmospheric chemistry and configuration. it provides evidence for scientists, such as how added greenhouse gases may participate in a change in temperature or water composition in the atmosphere.
3.) Stratosphere- This layer is at 10–31 Miles and the ozone layer lies within the stratosphere. It absorbs ultraviolet radiation from the Sun.
4.) Troposphere- this layer lies at 0–10 Miles and is the layer of the Earth's atmosphere where all human activity takes place.
So, the correct answer is option C- 4 i.e. Earth's atmosphere has 4 primary layers.

Note: We live at the ground of an invisible ocean called the atmosphere. This is a layer of gases surrounding our planet. Nitrogen and oxygen report for 99 percent of the gases in dry air, with argon, carbon dioxide, helium, neon, and other gases composing minute portions. Water vapor and dust are also ingredients and of Earth's atmosphere.