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CBSE Class 7 Geography Chapter 4 Notes - Air

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Air Class 7 Notes Geography Chapter 4 - PDF Download

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Air is the standard term for a mixture of gasses that constitute the Earth’s atmosphere. The gas is chiefly nitrogen, mixed with argon, water vapour, oxygen, trace gases, and carbon dioxide. Air contributes to a significant factor for the survival of living creatures. In this chapter, students will learn the significance of air and how it is essential for our survival. Students can refer to the Class 7 Geography Chapter 4 Notes to understand elaborate explanations on the structure of the atmosphere, composition of the atmosphere, and climate, weather, and so on.

CBSE Class 7 Geography Chapter 4 Notes - Air part-1
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FAQ (Frequently Asked Questions)

1. What is the importance of rainfall?

Rainfall is essential due to several reasons. These include- 

  • It plays a fundamental role in the survival of animals and plants. 

  • It offers freshwater to the surface of the earth. 

  • If rainfall is comparatively less, drought and water scarcity may occur. Moreover, if it’s relatively more, floods may take place. 

2. What are the different types of rainfall?

In brief, there are three types of rainfall. These include- 

  • The cyclonic rainfall

  • The conventional rainfall 

  • The orographic rainfall 

3. What is the importance of carbon dioxide?

Carbon dioxide is essential for green plants as they use it to prepare food while releasing oxygen. Additionally, animals or humans release this carbon dioxide that is used by the plants to prepare food. It further creates a balance for humans.