Class 7 Geography (Our Environment) Chapter 4 Questions and Answers - FREE PDF Download
Get the easy to understand Vedantu's Class 7 Geography NCERT Solutions. Access the "Air" Class 7 PDF, which simplifies fundamental principles crucial for understanding the subject's complex topics, with these detailed solutions.
By accessing class 7 geography chapter 4 questions and answers, students gain comprehensive insights into the core concepts such as components of an environment, natural environment, ecosystem, and more outlined in the curriculum. Check out the revised CBSE Class 7 Social Science Syllabus and start with Vedantu to excel in your exams.
Glance on NCERT Solutions for Class 7 Geography Chapter 4 Air
Class 7th Geography Air chapter explains the fundamental aspects of the Earth's atmosphere and its significance in sustaining life and influencing weather patterns.
NCERT class 7 geography chapter 4 provides detailed explanations, diagrams, and examples to enhance understanding of the complex interactions within the atmosphere.
It begins by describing air and its composition in the Earth's atmosphere, along with the percentage of gases found. Then it continues onto the structure of the Earth's atmosphere, with all the lawyers from the Earth's troposphere to the exosphere described in detail.
Class 7 geography chapter 4 questions and answers emphasis the impact of human activities on air quality and climate and highlight the importance of sustainable practices.
With these solutions, students gain a foundational understanding of the atmosphere's composition, dynamics, and crucial role in shaping Earth's environment and weather patterns.
It helps students to not only grasp the scientific principles underlying Earth's atmosphere but also recognize the importance of sustainable practices to preserve air quality and ensure a healthy environment for future generations.
By studying the composition and dynamics of air, students gain insights into the interconnected systems that shape our planet's environment.
1. Answer the following questions.
i. What is atmosphere?
Ans: The vast blanket of air around the earth’s surface is called the atmosphere.
ii. Which two gases make the bulk of atmosphere?
Ans: Nitrogen and Oxygen make up the bulk of the atmosphere.
iii. Which gas creates greenhouse effect in the atmosphere?
Ans: Carbon dioxide creates greenhouse effect in the atmosphere
iv. What is weather?
Ans: Observation of the physical features such as temperature, wind conditions, etc. over a short area for a short amount of time is called weather.
v. Name three types of rainfall.
Ans: The three types of rainfall are topographic, convectional and frontal.
vi. What is air pressure?
Ans: The pressure exerted by the atmosphere due to its weight over a region is called atmospheric pressure.
2. Tick the correct answer:
i. Which of the following gases protects us from harmful sun rays?
(a) Carbon dioxide (b) Nitrogen (c) Ozone.
Ans: (c) Ozone
ii. The most important layer of the atmosphere is.
(a) Troposphere (b) Thermosphere. (c) Mesosphere
Ans: (a) Troposphere.
iii. Which of the following layers of atmosphere free from clouds?
(a) Troposphere (b) Stratosphere (c) Mesosphere
Ans: (b) Stratosphere.
iv. As we go up the layers of the atmosphere, the pressure
(a) Increases. (b) Decreases. (c) Remain same
Ans: (b) Decreases.
v. When precipitation comes down to the earth liquid form, it is called:
(a) Cloud (b) Rain (c) Snow
Ans: (b) Rain
1. Match the following:
Ans:
4. Give reasons.
i. Wet clothes take longer time to dry on a humid day?
Ans: It is because on a humid day, the air is already saturated with water vapour so it cannot absorb the water from the clothes.
ii. Amount of insolation decreases from equator towards poles?
Ans: It is because the angle of sunrays falling on the earth decreases from equator to the poles. So, insolation decreases towards the poles.
5. For Fun
i. Solve this crossword puzzle with the help of given clues (on page no.28):
Ans:
ii. Make a weather calendar for one week. Use pictures or symbols to show different types of weather. You can use more than one symbol in a day, if the weather changes. For example, the sun comes out when rain stops. An example is given below:
Topics Covered in Class 7 Geography Chapter 4 Air
Benefits of NCERT Solutions for Class 7 Social Science Air Chapter 4
NCERT Solutions provides a thorough explanation of concepts related to air, such as its composition, air pressure, wind patterns, and the water cycle
These questions and answers include practical examples and real-world scenarios related to air and atmospheric phenomena.
The chapter solutions also included topics such as natural disasters, global warming, and the various effects that it has on human life.
NCERT Solutions for Class 7 Social Science Chapter 4, "Air," aligns precisely with the NCERT curriculum, ensuring that students receive a comprehensive and accurate understanding of the subject matter.
NCERT geography class 7 chapter 4 PDF provides clarity on complex concepts related to the composition, importance, and challenges associated with our Earth's atmosphere.
This Chapter Air class 7 questions and answers serves as a vital tool for exam preparation, offering step-by-step explanations and solutions to exercises, enabling students to practice and gauge their knowledge.
In addition to the solutions, Vedantu's subject experts provide important questions for NCERT class 7 geography chapter 4, facilitating easy syllabus revision before exams.
Important Study Material Links for Class 7 Geography Chapter 4 Air
Conclusion
Vedantu's NCERT Solutions for Class 7 Social Science Chapter 4 - "Air" is an invaluable educational resource for students. These solutions provide a structured and comprehensive approach to understanding the complex topic of our planet's atmosphere. Solutions are updated as per the NCERT curriculum, ensuring that students receive accurate and well-explained answers to their questions. These solutions aid in exam preparation by offering clarity on crucial concepts related to air composition, environmental issues, and the importance of clean air. By utilizing Vedantu's NCERT geography chapter 4 class 7 Solutions, students can enhance their knowledge, critical thinking skills, and overall academic performance.
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Related Important Links for Class 7 Geography
Discover essential related links for Class 7 Geography, offering detailed solutions, study materials, and resources to help students understand geographical concepts and prepare effectively for exams.
Important Related Links for NCERT Class 7 Social Science
Explore these essential related links for NCERT Class 7 Social Science, providing comprehensive resources, solutions, and study guides to support students in mastering key topics and preparing for exams effectively.
FAQs on NCERT Solutions for Class 7 Social Science Geography Chapter 4 Air
1. What is Wind?
Wind is an element of air that is the momentum of atmospheric air from one area to another. It occurs when gases from a high-pressure area move towards a low-pressure area. Winds are differentiated based on their velocity, the region they occur, and effects. Over a long period, winds can form landforms by erosion and deposition. They also affect the massive wildfires that the world is facing by being a source of oxygen to the strong fuel. Multiple plant species depend on the wind for their livelihood. Polar easterlies are cold winds while high-pressure winds blow across the North and South Poles.
2. What is Atmospheric Pressure?
Atmospheric pressure, also known as barometric pressure, is force per unit area exerted by an atmospheric column. An atmosphere is a unit of measurement. It is equal to the average air pressure at sea level which is at a temperature of 15 degrees Celsius. One atmosphere is 1,013 millibars or 760 millimetres of mercury. Atmospheric pressure drops as altitude increases. The atmospheric pressure on Honolulu, Hawai'i, is about double that of Denali, Alaska. Honolulu is at sea level. Aircraft create artificial pressure so that cabin passengers can lie comfortably. Different atmospheric pressures in different areas affect the human body.
3. What is the atmosphere as explained in Chapter 4 of NCERT Solutions for Class 7 Geography?
As explained in Chapter 4 of NCERT Solutions for Class 7 Geography, the atmosphere is a coat of air that surrounds the earth. The atmosphere consists of gases such as Nitrogen and Oxygen that have a higher concentration. The rest of the percentage comprises gases such as carbon dioxide, helium, etc. Vedantu provides NCERT solutions that are verified by experienced experts and are easy to understand.
4. What are the main topics covered in Chapter 4 of NCERT Solutions for Class 7 Geography?
The main topics that are covered in Chapter 4 of NCERT Solutions for Class 7 Geography are the climate, weather, layers of the atmosphere, atmosphere and composition of the atmosphere. The Vedantu study guide helps the students to start their exam preparation with revision notes, verified solutions by the experts, mock tests, and doubt clearing sessions.
5. What do you mean by air according to Class 7 Science?
In Class 7 Chapter 4, Air is defined as the mixture of different gases that are present in the earth’s atmosphere. 78% of the gas comprises Nitrogen, 21% oxygen, and the rest is inert gases. The pure air is said to have no colour or smell. Without air, humans cannot survive on Earth. Vedantu provides solutions free of cost to all the exercises chapter-wise. The solutions provided follow the guidelines set by the CBSE Board.
6. What is the air pressure in Science for Class 7?
Air pressure is the pressure force that is exerted on the earth’s surface or body from all directions simultaneously by air. The air pressure seems to decrease with an increase in height. Vedantu offers solutions in a simplified manner that are verified by experienced experts. The students can download the solutions for free for their offline reference. These are easily accessible at any time on the Vedantu website (vedantu.com)
7. Name the layers of the Earth’s atmosphere.
Earth Atmosphere consists of the following layers:
Troposphere: The first layer that is closest to earth among the other layers is the Troposphere.
Stratosphere: 50km above ground level, the Stratosphere is the second layer of the Earth atmosphere.
Mesosphere: Extending from 50km to 85km above the ground level, the Mesosphere is the coldest layer of the Earth’s atmosphere.
Thermosphere: The layer that extends from 90 km above the ground level is the Thermosphere.
Exosphere: The thinnest and the last layer of the Earth’s atmosphere is the Exosphere.
Vedantu offers a complete study guide for the students and is available for free download.
8. What topics are covered in NCERT Social Science Chapter 4 - Air Chapter Class 7?
NCERT Social Science Chapter 4 air class 7 questions and answers cover topics such as the composition of air, air pressure, wind patterns, rainfall, the role of air in ecosystems, the structure of the atmosphere, weather phenomena like cyclones and anticyclones, and the human impact on air quality and climate.
9. How can NCERT Chapter 4 Air help in understanding atmospheric dynamics?
NCERT air class 7 questions and answers provide clear explanations and diagrams that simplify complex concepts related to air and atmospheric dynamics. Class 7 geography chapter 4 questions and answers break down topics into understandable sections, helping students grasp the fundamentals of air composition, air pressure variations, wind patterns, and their impacts.
10. What are the benefits of using NCERT geography class 7 chapter 4 pdf?
NCERT geography chapter 4 class 7 offers comprehensive coverage of the chapter, ensuring students understand all key concepts thoroughly.
They provide practice questions and solved examples that aid in exam preparation.
The solutions encourage critical thinking through activities and exercises that prompt students to apply their knowledge to real-world scenarios.
NCERT Solutions promote interdisciplinary learning by integrating concepts from science and geography.
11. What are some real-life examples of how the concepts in NCERT class 7 geography chapter 4 pdf apply to everyday situations?
Real-life examples include understanding why coastal areas experience sea breezes and land breezes, how air pressure affects weather changes, and why certain regions receive more rainfall than others due to wind patterns as explained in class 7 geography chapter 4 PDF.
12. How does NCERT Class 7 Social Science Chapter 4 - Air relate to other subjects like Science?
Class 7 Geography ch 4 Question Answer integrates scientific principles such as the properties of gases, the water cycle, and weather patterns with geographical concepts. This interdisciplinary approach in class 7 geography chapter 4 solutions helps students see how scientific knowledge applies to geographical phenomena.
13. What are some practical activities or experiments that can help students understand the concepts of air and its dynamics discussed in air chapter class 7 pdf?
Practical activities in Air chapter class 7 pdf include measuring air pressure using a homemade barometer, studying local wind patterns by observing weather changes and conducting experiments to understand the factors influencing rainfall and its distribution.
14. How does NCERT Chapter 4 Air Geography Class 7 address environmental issues like air pollution and climate change?
Chapter 4 Air Geography Class 7 discusses human activities that contribute to air pollution, such as industrial emissions and vehicular exhaust. Class 7 Geography Chapter 4 solutions also explores the broader implications of climate change caused by greenhouse gases and their impact on global weather patterns.
