Chapter 4. Air Class 7 Geography [LATEST] Solutions NCERT Exercise in English - CBSE Study
NCERT Solutions for Class 7 Geography are carefully prepared according to the latest CBSE syllabus and NCERT textbooks to help students understand every concept clearly. These solutions cover all important Chapter 4. Air with detailed explanations and step-by-step answers for better exam preparation. Each NCERT Exercise is explained in simple language so that students can easily grasp the fundamentals and improve their academic performance. The study material is designed to support daily homework, revision practice, and final exam preparation for Class 7 students. With accurate answers, concept clarity, and structured content, these NCERT solutions help learners build confidence and score higher marks in their examinations. Whether you are revising a specific topic or preparing an entire chapter, this resource provides reliable and syllabus-based guidance for complete success in Geography.
Class 7 English Medium Geography All Chapters:
Chapter 4. Air
1. NCERT Exercise
Exercise - Question:
Que: Answer the following questions.
(i) What is atmosphere?
(ii) Which two gases make the bulk of the atmosphere?
(iii) Which gas creates green house effect in the atmosphere?
(iv) What is weather?
(v) Name three types of rainfall?
(vi) What is air pressure?
Ans:
(i) A huge blanket of air by which our earth is surrounded called atmosphere.
(ii) (a) Nitrogen (b) oxygen.
(iii) Carbon dioxide.
(iv) Weather is hour-to-hour, day to day condition of the atmosphere.
(v) (i) Convectional rainfall, (ii) orographic rainfall, (iii) cyclone rainfall.
(vi) Air pressure is definedas the preesure excreted by the weight of air on the earth's surface.
Que: Tick the correct answer.
(i) Which of the following gases protects us from harmful sun rays?
(a) Carbon dioxide
(b) Nitrogen
(c) Ozone
(ii) The most important layer of the atmosphere is
(a) Troposphere
(b) Thermosphere
(c) Mesosphere
(iii) Which of the following layers of the atmosphere is free from clouds?
(a) Troposphere
(b) Stratosphere
(c) Mesosphere
(iv) As we go up the layers of the atmosphere, the pressure
(a) Increases
(b) Decreases
(c) Remains the same
(v) When precipitation comes down to the earth in the liquid form, it is called
(a) Cloud
(b) Rain
(c) Snow
Ans:
(i) - (c)
(ii) - (a)
(iii) - (b)
(iv) - (b)
(v) - (b).
Que: Match the following.
(i) Trade Winds (a) Incoming solar energy
(ii) Loo (b) Seasonal wind
(iii) Monsoon (c) Horizontal movement of Air
(iv) Wind (d) Layer of ozone gas
(e) Permanent wind
(f) Local wind
Ans:
| Column I | Column II |
| (i) Trade winds | (e) Permanent wind |
| (ii) Loo | (f) Local wind |
| (iii) Monsoon | (b) Seasonal wind |
| (iv) Wind | (c) Horizontal movement of air |
Que: Give reasons.
(i) Wet clothes take longer time to dry on a humid day?
(ii) Amount of insolation decreases from equator towards poles?
Ans:
(i) Because on a humid day, there is more water in air than a sunny day. So, air can soak less water from wet clothes, i.e. rate of evaporation decreases.
(ii) Because sun rays fall vertical on the equator while slanting on the poles.
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