{"id":1743,"date":"2022-10-04T07:14:30","date_gmt":"2022-10-04T07:14:30","guid":{"rendered":"https:\/\/theexampillar.com\/ncert\/?p=1743"},"modified":"2022-11-29T06:38:06","modified_gmt":"2022-11-29T06:38:06","slug":"ncert-solutions-class-7-social-science-geography-chapter-4-air","status":"publish","type":"post","link":"https:\/\/theexampillar.com\/ncert\/ncert-solutions-class-7-social-science-geography-chapter-4-air\/","title":{"rendered":"NCERT Solutions Class 7 Social Science (Geography) Chapter 4 Air"},"content":{"rendered":"<h2 style=\"text-align: center;\"><span style=\"color: #000000; font-family: georgia, palatino, serif;\">NCERT Solutions Class 7 Social Science (Geography)\u00a0<\/span><\/h2>\n<p style=\"text-align: justify;\"><span style=\"color: #000000; font-family: georgia, palatino, serif;\">The NCERT Solutions in English Language for Class 7 Social Science (Geography &#8211; Our Environment) <strong>Chapter &#8211; 4 (Air) <\/strong>has been provided here to help the students in solving the questions from this exercise.\u00a0<\/span><\/p>\n<h2 style=\"text-align: center;\"><span style=\"color: #000000; font-family: georgia, palatino, serif;\">Chapter &#8211; 4 (Air)<\/span><\/h2>\n<p style=\"text-align: center;\"><span style=\"text-decoration: underline; color: #ff0000;\"><span style=\"font-size: 14pt;\"><strong>Exercises<\/strong><\/span><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>1. Answer the following questions.<\/strong><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>(i) What is the atmosphere?<br \/>\n<\/strong><\/span><span style=\"color: #000000;\"><strong>Answer &#8211;\u00a0<\/strong>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.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>(ii) Which two gases make the bulk of the atmosphere?<br \/>\n<\/strong><\/span><span style=\"color: #000000;\"><strong>Answer &#8211; <\/strong>Nirtrogen (78%) and oxygen (21%) make the bulk of the atmosphere.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>(iii) Which gas creates a greenhouse effect in the atmosphere?<br \/>\n<\/strong><\/span><span style=\"color: #000000;\"><strong>Answer &#8211; <\/strong>Carbon dioxide is the gas that creates the greenhouse effect in the atmosphere.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>(iv) What is the weather?<br \/>\n<\/strong><\/span><span style=\"color: #000000;\"><strong>Answer &#8211; <\/strong>The hour to hour or the day to day condition of the atmosphere is called weather. Weather can change dramatically from day-to-day. It may be classified as hot, dry, cold or wet.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>(v) Name three types of rainfall?<br \/>\n<\/strong><\/span><span style=\"color: #000000;\"><strong>Answer &#8211; <\/strong>The three types of rainfall are as follows:-<br \/>\n<\/span><span style=\"color: #000000;\">1. Convectional rainfall<br \/>\n<\/span><span style=\"color: #000000;\">2. Orographic rainfall<br \/>\n<\/span><span style=\"color: #000000;\">3. Cyclonic rainfall<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>(vi) What is air pressure?<br \/>\n<\/strong><\/span><span style=\"color: #000000;\"><strong>Answer &#8211; <\/strong>Air pressure is defined as the pressure exerted by the weight of air on the earth\u2019s surface. The air pressure decreases as height increases and is the highest at the sea level.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>2. Tick the correct answer.<\/strong><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>(i) Which of the following gases protects us from harmful sun rays?<br \/>\n<\/strong><\/span><span style=\"color: #000000;\">(a) Carbon dioxide<br \/>\n<\/span><span style=\"color: #000000;\">(b) Nitrogen<br \/>\n<\/span><span style=\"color: #000000;\">(c) Ozone<br \/>\n<\/span><span style=\"color: #000000;\"><strong>Answer &#8211; <\/strong>(c) Ozone<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>(ii) The most important layer of the atmosphere is<br \/>\n<\/strong><\/span><span style=\"color: #000000;\">(a) Troposphere<br \/>\n<\/span><span style=\"color: #000000;\">(b) Thermosphere<br \/>\n<\/span><span style=\"color: #000000;\">(c) Mesosphere<br \/>\n<\/span><span style=\"color: #000000;\"><strong>Answer &#8211; <\/strong>(a) Troposphere<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>(iii) Which of the following layers of the atmosphere is free from clouds?<br \/>\n<\/strong><\/span><span style=\"color: #000000;\">(a) Troposphere<br \/>\n<\/span><span style=\"color: #000000;\">(b) Stratosphere<br \/>\n<\/span><span style=\"color: #000000;\">(c) Mesosphere<br \/>\n<\/span><span style=\"color: #000000;\"><strong>Answer &#8211;\u00a0<\/strong>(b) Stratosphere<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>(iv) As we go up the layers of the atmosphere, the pressure<br \/>\n<\/strong><\/span><span style=\"color: #000000;\">(a) Increases<br \/>\n<\/span><span style=\"color: #000000;\">(b) Decreases<br \/>\n<\/span><span style=\"color: #000000;\">(c) Remains the same<br \/>\n<\/span><span style=\"color: #000000;\"><strong>Answer &#8211;\u00a0<\/strong>(b) Decreases<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>(v) When precipitation comes down to the earth in the liquid form, it is called<br \/>\n<\/strong><\/span><span style=\"color: #000000;\">(a) Cloud<br \/>\n<\/span><span style=\"color: #000000;\">(b) Rain<br \/>\n<\/span><span style=\"color: #000000;\">(c) Snow<br \/>\n<\/span><span style=\"color: #000000;\"><strong>Answer &#8211;\u00a0<\/strong>(b) Rain<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>3. Match the following.<\/strong><\/span><\/p>\n<div class=\"table-responsive\" style=\"text-align: justify;\">\n<table class=\"table table-bordered\">\n<tbody>\n<tr>\n<td><span style=\"color: #000000;\">(i) Trade Winds<\/span><\/td>\n<td><span style=\"color: #000000;\">(a) Incoming solar energy<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"color: #000000;\">(ii) Loo<\/span><\/td>\n<td><span style=\"color: #000000;\">(b) Seasonal wind<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"color: #000000;\">(iii) Monsoon<\/span><\/td>\n<td><span style=\"color: #000000;\">(c) The horizontal movement of Air<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"color: #000000;\">(iv) Wind<\/span><\/td>\n<td><span style=\"color: #000000;\">(d) A layer of ozone gas<\/span><\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td><span style=\"color: #000000;\">(e) Permanent wind<\/span><\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td><span style=\"color: #000000;\">(f) Local wind<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>Answer &#8211;\u00a0<\/strong><\/span><\/p>\n<div class=\"table-responsive\" style=\"text-align: justify;\">\n<table class=\"table table-bordered\">\n<tbody>\n<tr>\n<td><span style=\"color: #000000;\">(i) Trade Winds<\/span><\/td>\n<td><span style=\"color: #000000;\">(e) Permanent wind<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"color: #000000;\">(ii) Loo<\/span><\/td>\n<td><span style=\"color: #000000;\">(f) Local wind<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"color: #000000;\">(iii) Monsoon<\/span><\/td>\n<td><span style=\"color: #000000;\">(b) Seasonal wind<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"color: #000000;\">(iv) Wind<\/span><\/td>\n<td><span style=\"color: #000000;\">(c) The horizontal movement of Air<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>4. Give reasons.<br \/>\n<\/strong><\/span><span style=\"color: #000000;\"><strong>(i) Wet clothes take longer time to dry on a humid day?<br \/>\n<\/strong><\/span><span style=\"color: #000000;\"><strong>Answer &#8211; <\/strong>Wet clothes take longer time to dry on a humid day because on a humid day, there is more water in the air than on a sunny day. So, air can soak less water from wet clothes, i.e. rate of evaporation decreases.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>(ii) Amount of insolation decreases from the equator towards poles?<br \/>\n<\/strong><\/span><span style=\"color: #000000;\"><strong>Answer &#8211; <\/strong>Insolation is the incoming solar energy intercepted by the earth. Amount of insolation decreases from the equator toward poles, because sun rays fall vertically on the equator and slant on the poles.<\/span><\/p>\n<table style=\"width: 100%; border-collapse: collapse;\" border=\"1\">\n<tbody>\n<tr>\n<td style=\"width: 100%; background-color: #f2e079; text-align: center;\"><span style=\"color: #ff0000; font-size: 14pt;\"><strong>NCERT Class 7<sup>th\u00a0<\/sup>Solution\u00a0<\/strong><\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 100%; text-align: left;\"><span style=\"color: #ff0000; font-size: 14pt;\"><strong><span style=\"color: #0000ff; font-family: georgia, palatino, serif; font-size: 12pt;\"><a class=\"row-title\" style=\"color: #0000ff;\" href=\"https:\/\/theexampillar.com\/ncert\/ncert-solutions-class-7-english\/\" target=\"_blank\" rel=\"noopener\" aria-label=\"\u201cNCERT Solutions Class 6 English\u201d (Edit)\">NCERT Solutions Class 7 English<\/a><\/span><\/strong><\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 100%; text-align: left;\"><span style=\"color: #ff0000; font-size: 14pt;\"><strong><span style=\"color: #0000ff; font-family: georgia, palatino, serif; font-size: 12pt;\"><a class=\"row-title\" style=\"color: #0000ff;\" href=\"https:\/\/theexampillar.com\/ncert\/ncert-solutions-class-7-hindi\/\" aria-label=\"\u201cNCERT Solutions Class 6 Maths\u201d (Edit)\">NCERT Solutions Class 7 Hindi<\/a><\/span><\/strong><\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 100%; text-align: left;\"><span style=\"color: #ff0000; font-size: 14pt;\"><strong><span style=\"color: #0000ff; font-family: georgia, palatino, serif; font-size: 12pt;\"><a class=\"row-title\" style=\"color: #0000ff;\" href=\"https:\/\/theexampillar.com\/ncert\/ncert-solutions-class-7-maths\/\" target=\"_blank\" rel=\"noopener\" aria-label=\"\u201cNCERT Solutions Class 6 Maths\u201d (Edit)\">NCERT Solutions Class 7 Mathematics<\/a>\u00a0<\/span><\/strong><\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 100%; text-align: left;\"><a href=\"https:\/\/theexampillar.com\/ncert\/ncert-solutions-class-7-sanskrit-ruchira\/\" target=\"_blank\" rel=\"noopener\"><span style=\"color: #ff0000; font-size: 14pt;\"><strong><span style=\"color: #0000ff; font-family: georgia, palatino, serif; font-size: 12pt;\">NCERT Solutions Class 7 Sanskrit<\/span><\/strong><\/span><\/a><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 100%; text-align: left;\"><span style=\"color: #ff0000; font-size: 14pt;\"><strong><span style=\"color: #0000ff; font-family: georgia, palatino, serif; font-size: 12pt;\"><a class=\"row-title\" style=\"color: #0000ff;\" href=\"https:\/\/theexampillar.com\/ncert\/ncert-solutions-class-7-science\/\" target=\"_blank\" rel=\"noopener\" aria-label=\"\u201cNCERT Solutions Class 6 Social Science\u201d (Edit)\">NCERT Solutions Class 7 Science<\/a><\/span><\/strong><\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 100%; text-align: left;\"><span style=\"color: #ff0000; font-size: 14pt;\"><strong><span style=\"color: #0000ff; font-family: georgia, palatino, serif; font-size: 12pt;\"><a class=\"row-title\" style=\"color: #0000ff;\" href=\"https:\/\/theexampillar.com\/ncert\/ncert-solutions-class-7-social-science\/\" target=\"_blank\" rel=\"noopener\" aria-label=\"\u201cNCERT Solutions Class 6 Social Science\u201d (Edit)\">NCERT Solutions Class 7 Social Science<\/a><\/span><\/strong><\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>NCERT Solutions Class 7 Social Science (Geography)\u00a0 The NCERT Solutions in English Language for Class 7 Social Science (Geography &#8211; Our Environment) Chapter &#8211; 4 (Air) has been provided here to help the students in solving the questions from this exercise.\u00a0 Chapter &#8211; 4 (Air) Exercises 1. Answer the following questions. (i) What is the [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[220],"tags":[221,250,251,245,5],"class_list":["post-1743","post","type-post","status-publish","format-standard","hentry","category-class-7-social-science","tag-class-7-ncert-solutions","tag-ncert-class-7-social-science-geography-chapter-4-air","tag-ncert-solutions-class-7-social-science-geography-chapter-4-in-english","tag-ncert-solutions-class-7-social-science-geography-in-english","tag-ncert-solutions-in-english"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.9 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>NCERT Solutions Class 7 Social Science (Geography) Chapter 4 Air | TheExamPillar NCERT<\/title>\n<meta name=\"description\" content=\"NCERT Solutions Class 7 Social Science (Geography)\u00a0The NCERT Solutions in English Language for Class 7 Social Science (Geography - 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