D. Short Answer Type Questions:
1. What do you know about the composition of the atmosphere?
2. Why is the atmosphere important for us?
3. Write a short note on the atmospheric layers of the earth.
Answers
1. What do you know about the composition of the atmosphere?
Earth's atmosphere is composed of about 78 percent nitrogen, 21 percent oxygen, 0.9 percent argon, and 0.1 percent other gases. Trace amounts of carbon dioxide, methane, water vapor, and neon are some of the other gases that make up the remaining 0.1 percent.
2. Why is the atmosphere important for us?
The atmosphere protects Earth from harmful solar radiations and regulates heating provided by the Sun. The first function is made possible by ozone existing in the stratosphere, the second function is achieved by a mix of gases existing in the whole atmosphere called “greenhouse gases”.
3. Write a short note on the atmospheric layers of the earth.
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.
1.What do you know about the composition of the atmosphere?
ans) Earth's atmosphere is composed of about 78 percent nitrogen, 21 percent oxygen, 0.9 percent argon, and 0.1 percent other gases. Trace amounts of carbon dioxide, methane, water vapor, and neon are some of the other gases that make up the remaining 0.1 percent.
2.Why is the atmosphere important for us?
ans) The atmosphere contains the air that we breathe; protects us from the harmful radiation of the Sun; helps to keep the planet's heat on the surface, and plays a very important role in the water cycle. ... Also, without photosynthesis, there would be very little oxygen in the air.
3.Write a short note on the atmospheric layers of the earth.
ans) The atmosphere is the layer of gases around the Earth. It is held in place by Earth's gravity. There are total 5 layers of atmosphere, named stratosphere, troposphere, mesosphere, thermosphere, and exosphere. ... The atmosphere protects life on Earth by absorbing (taking) ultraviolet rays from the sun.