Question.
Name the different layers of the atmosphere.
( Chapter 5: Major Domains of the Earth, Class 6- The Earth: Our Habitat ( GEOGRAPHY), SOCIAL SCIENCE)
Answer.
The atmosphere is one of the four domains of the Earth. The gaseous portion that surrounds the Earth is called the atmosphere.
The Earth's atmosphere is divided into several layers based on temperature and composition. The main layers of the atmosphere, from lowest ( earth's ground) to highest, are:
- Troposphere
- Stratosphere
- Mesosphere
- Thermosphere
- Exosphere
Troposphere:
Troposphere is the lowest layer and is where all weather phenomena occur. It contains most of the Earth's weather-related phenomena and extends from the surface up to about 7-20 kilometers in altitude, depending on location and season.
Stratosphere:
Above the troposphere, the stratosphere contains the ozone layer, which absorbs and scatters the sun's ultraviolet (UV) radiation. It extends from the tropopause (the boundary with the troposphere) to approximately 50 kilometers in altitude.
Mesosphere:
The mesosphere is above the stratosphere and extends from about 50 kilometers to 85 kilometers in altitude. It's the coldest layer of the atmosphere and where meteors burn up when they enter this layer.
Thermosphere:
The thermosphere layer extends from about 85 kilometers (53 miles) to hundreds of kilometers in altitude. It's where the International Space Station orbits. Despite its high altitude, the thermosphere has very thin air, and temperatures rise with increasing altitude due to the absorption of solar radiation.
The ionosphere is part of the thermosphere, radio signals get back to the earth's surface by the ionosphere.
Exosphere:
The exosphere is the outermost layer of the atmosphere, where atoms and molecules can escape into space. It gradually transitions into the vacuum of outer space.
These layers play crucial roles in regulating temperature, and weather patterns, and protecting life on Earth from harmful radiation.
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