An atmosphere is a blanket of gases that surrounds Earth. It is held near the surface of the planet by Earth’s gravitational attraction. Argon, oxygen and nitrogen from the three main constituents of the atmosphere. Definition

2019年10月2日 · (i) Atmosphere is a thin blanket of air that surrounds the earth. It protects us from the harmful rays of the sun. It consists of several gases in which nitrogen and oxygen occupy the major portion. (ii) Nirtrogen (78%) and oxygen (21%) make the bulk of the atmosphere. (iii) Carbon dioxide creates a greenhouse effect in the atmosphere.

2024年1月27日 · Here we have given Air Class 7 Geography Chapter 4 Notes. Our atmosphere is surrounded by a huge blanket of air called atmosphere. Composition of the Atmosphere. Nitrogen and oxygen are the two gases which make up the bulk of the atmosphere. Carbon dioxide, helium, ozone, argon and hydrogen are found in lesser quantities.

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GEOGRAPHY CLASS 7 CHAPTER – ATMOSPHERE E/ Q 1) What is the composition of the atmosphere? Ans: The atmosphere composed of mixture of gasses, Water vapour, dust particles, pollen grains and many impurities (smoke, salt and other chemicals). The main constituent gasses

In the atmosphere, the density of air increases with increase in height. All weather phenomena occurs in the stratosphere. A greenhouse is a brick house used to grow plants in cold areas. A rise in sea level due to global warming will cause flooding of mountainous areas. Light year is used to measure the thickness of ozone layer. Answer.

2019年12月5日 · What is the atmosphere as explained in Chapter 4 of NCERT Solutions for Class 7 Geography? The blanket of air surrounding the Earth is called the atmosphere. The atmosphere primarily comprises nitrogen and oxygen in bulk and other gases like carbon dioxide, helium, ozone, etc. in fewer quantities.

2016年9月13日 · • A huge blanket of air that surrounds earth is called atmosphere. • It provides us the air we breathe and protects us from the harmful effects of the sun’s rays which is essential for our survival. • Nitrogen and oxygen are two gases which make up the bulk of the atmosphere.

The atmosphere is a combination of various gases that sheathes the earth. The air is an essential part of the earth’s mass, and 99%of it is constricted to the peak of 32 km from the earth’s surface. The atmosphere has water vapor, gases (nitrogen, oxygen, etc.), and dust particles.

2023年10月9日 · Earth’s atmosphere consists of five distinct layers, each with unique characteristics and significance. The troposphere is the lowest layer of the atmosphere and is where weather phenomena occur. It contains the air we breathe and is essential for life on Earth.