Table of Contents
Air is surrounding us. It’s a combination of various gases. The air in Earth’s climate is comprised of roughly 78% nitrogen and 21% oxygen. Our air is partitioned into five layers beginning from the world’s surface. The five layers are Troposphere, Stratosphere, Mesosphere, Thermosphere, and Exosphere. Climate is this hour-to-hour, everyday state of the environment. The normal climate state of a spot for a more drawn-out timeframe addresses the environment of a spot. For students of Class 7, NCERT Solutions for 7th Class Social Science Geography gives solid essential information on the parts and will assume a conspicuous part while getting ready for the end of the year exams.
Students can also get the NCERT Solutions for 7th Class for different subjects at the connected article.
NCERT Solutions for 7th Class Social science 4th Chapter Air – Download PDF Here
TEXTUAL QUESTIONS
Ques 1. What is the atmosphere?
Ans. The huge blanket of air surrounding the Earth is called the atmosphere.
Ques 2. Which two gases make up the bulk of the atmosphere?
Ans. Nitrogen and oxygen make up the bulk of the atmosphere.
Ques 3. Which gas creates the greenhouse effect in the atmosphere?
Ans. Carbon dioxide creates a greenhouse effect in the atmosphere.
Ques 4. What is the weather?
Ans. Weather refers to the short-term changes in the atmosphere. It is the hour-to-hour, day-to-day condition of the atmosphere
Ques 5. Name three types of rainfall?
Ans. Convectional rainfall, orographic rainfall, and cyclonic rainfall are the three types of rainfall.
Ques 6. What is air pressure?
Ans. Air pressure is defined as the pressure exerted by the weight of air on the Earth’s surface.
Tick the correct answer.
(i) Which of the following gases protects us from harmful sun rays?
(a) Carbon dioxide
(b) Nitrogen
(c) Ozone
Answer: c
(ii) The most important layer of the atmosphere is
(a) Troposphere
(b) Thermosphere
(c) Mesosphere
Answer: a
(iii) Which of the following layers of the atmosphere is free from clouds?
(a) Troposphere
(b) Stratosphere
(c) Mesosphere
Answer: b
(iv) As we go up the layers of the atmosphere, the pressure
(a) Increases
(b) Decreases
(c) Remains the same
Answer: b
(v) When precipitation comes down to the earth in the liquid form, it is called
(a) Cloud
(b) Rain
(c) Snow
Answer: b
Match the following.
| (i) Trade Winds | (a) Incoming solar energy |
| (ii) Loo | (b) Seasonal wind |
| (iii) Monsoon | (c) The horizontal movement of Air |
| (iv) Wind | (d) A layer of ozone gas |
| (e) Permanent wind | |
| (f) Local wind |
Answer:
| (i) Trade Winds | (e) Permanent wind |
| (ii) Loo | (f) Local wind |
| (iii) Monsoon | (b) Seasonal wind |
| (iv) Wind | (c) The horizontal movement of Air |
Give reasons.
1. Wet clothes take a longer time to dry on a humid day?
i) Things remain damp and wet and take a longer time to dry when the atmosphere around them has damp and wet.
ii) Humidity is the amount of moisture or water vapour present in the air at any moment in time.
iii) On a humid day, the air is full of water vapour. As the air gets warmer, its capacity to hold the action of waves, water vapour increases.
iv) As a result, conditions become more and more humid. Hence, wet clothes take a longer time to dry on a humid day.
2. Amount of insolation decreases from the equator towards poles?
Insolation is the incoming solar energy intercepted by the earth. The amount of insolation decreases from the equator toward the poles, because sun rays fall vertically on the equator and slant on the poles.
Air Summary
The chapter “Air” from the NCERT Social Science Geography book details:
- Synthesis of the Atmosphere
- Climate and Climate
- Design of the Atmosphere
- Lower atmosphere
- Mesosphere
- Stratosphere
- Mesosphere
- Thermosphere
- Exosphere
Our Environment is the NCERT Social Science Geography book for students of Class 7. For NCERT Solutions for 7th Class Social Sciences, visit the connected article.
FAQs on Ncert Solutions for Class 7 Social Science Geography Chapter 4 Air
1. What the atmosphere is as explained in the 4th Chapter of NCERT Solutions for 7th Class Geography?
The cover of air encompassing the earth is known as the climate. The environment principally contains nitrogen and oxygen in mass and different gases like carbon dioxide, helium, ozone, and so on in lesser amounts. All living creatures on earth rely upon the climate for their endurance. Other significant ideas of this section can be adapted effectively by alluding to the NCERT Solutions made by subject specialists at INFINITY LEARN.
2. What are the main topics covered in the 4th Chapter of NCERT Solutions for 7th Class Geography?
The main topics covered in the 4th Chapter of NCERT Solutions for 7th Class Social Science Geography are:
Organization of the Atmosphere
Climate and Climate
Design of the Atmosphere
- Lower atmosphere
- Mesosphere
- Stratosphere
- Mesosphere
- Thermosphere
- Exosphere
3. How might I involve the NCERT Solutions for 7th Class Social Science Geography 4th Chapter PDF from INFINITY LEARN successful for my exams readiness?
Students can get to the NCERT Solutions for 7th Class Social Science Geography4th Chapter PDF from INFINITY LEARN by essentially tapping on the download joins connected. Students can use these answers to gain proficiency with the right responses for the inquiries present in their recommended CBSE course reading. Every one of the arrangements made is extremely precise and in light of the most recent CBSE prospectus and rules. Significantly, students can involve the arrangements PDF for modification purposes as it contains every one of the fundamental subjects being featured.
