{"id":1741,"date":"2022-10-04T07:14:20","date_gmt":"2022-10-04T07:14:20","guid":{"rendered":"https:\/\/theexampillar.com\/ncert\/?p=1741"},"modified":"2022-11-29T06:37:59","modified_gmt":"2022-11-29T06:37:59","slug":"ncert-solutions-class-7-social-science-geography-chapter-3-our-changing-earth","status":"publish","type":"post","link":"https:\/\/theexampillar.com\/ncert\/ncert-solutions-class-7-social-science-geography-chapter-3-our-changing-earth\/","title":{"rendered":"NCERT Solutions Class 7 Social Science (Geography) Chapter 3 Our Changing Earth"},"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; 3 (Our Changing Earth) <\/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; 3 (Our Changing Earth)<\/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.<br \/>\n<\/strong><\/span><span style=\"color: #000000;\"><strong>(i) Why do the plates move?<br \/>\n<\/strong><\/span><span style=\"color: #000000;\"><strong>Answer &#8211; <\/strong>The plates move due to endogenic forces acting in the interior of the earth.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>(ii) What are exogenic and endogenic forces?<br \/>\n<\/strong><\/span><span style=\"color: #000000;\"><strong>Answer &#8211; <\/strong>The forces that act in the interior of the earth are called endogenic forces. The forces that act on the earth\u2019s surface are called exogenic forces.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>(iii) What is erosion?<br \/>\n<\/strong><\/span><span style=\"color: #000000;\"><strong>Answer &#8211; <\/strong>Erosion is the wearing away of the landscape by different agents like water, wind, and ice.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>(iv) How are flood plains formed?<br \/>\n<\/strong><\/span><span style=\"color: #000000;\"><strong>Answer &#8211; <\/strong>During its course through a plain, a river sometimes overflows its banks. This leads to the flooding of the neighbouring areas. As it floods, the river water deposits layers of fine soil and sediments on its banks. This leads to the formation of a flat, fertile flood plain.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>(v) What are sand dunes?<br \/>\n<\/strong><\/span><span style=\"color: #000000;\"><strong>Answer &#8211; <\/strong>In deserts, when wind blows, it lifts and transports sand from one place to another. When it stops blowing, the sand particles fall and get deposited in low hill-like structures called sand dunes.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>(vi) How are beaches formed?<br \/>\n<\/strong><\/span><span style=\"color: #000000;\"><strong>Answer &#8211; <\/strong>The sea waves deposit sediments along the seashores. This results in the formation of beaches.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>(vii) What are the ox-bow lakes?<br \/>\n<\/strong><\/span><span style=\"color: #000000;\"><strong>Answer &#8211; <\/strong>When the river enters the plains, it twists and turns forming large bends known as meanders. In due course of time, the meander loops start to cut off the river and form cut off lakes, known as the ox-bow lakes.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>2. Tick the correct answer.<br \/>\n<\/strong><\/span><span style=\"color: #000000;\"><strong>(i) Which is not an erosional feature of sea waves?<br \/>\n<\/strong><\/span><span style=\"color: #000000;\">(a) Cliff<br \/>\n<\/span><span style=\"color: #000000;\">(b) Beach<br \/>\n<\/span><span style=\"color: #000000;\">(c) Sea cave<br \/>\n<strong>Answer &#8211;\u00a0<\/strong>(b) Beach<br \/>\n<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>(ii) The depositional feature of a glacier is:<br \/>\n<\/strong><\/span><span style=\"color: #000000;\">(a) Flood plain<br \/>\n<\/span><span style=\"color: #000000;\">(b) Beach<br \/>\n<\/span><span style=\"color: #000000;\">(c) Moraine<br \/>\n<strong>Answer &#8211;\u00a0<\/strong>(c) Moraine<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>(iii) Which is caused by the sudden movements of the earth?<br \/>\n<\/strong><\/span><span style=\"color: #000000;\">(a) Volcano<br \/>\n<\/span><span style=\"color: #000000;\">(b) Folding<br \/>\n<\/span><span style=\"color: #000000;\">(c) Flood plain<br \/>\n<strong>Answer &#8211;\u00a0<\/strong>(a) Volcano<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>(iv) Mushroom rocks are found in:<br \/>\n<\/strong><\/span><span style=\"color: #000000;\">(a) Deserts<br \/>\n<\/span><span style=\"color: #000000;\">(b) River valleys<br \/>\n<\/span><span style=\"color: #000000;\">(c) Glaciers<br \/>\n<strong>Answer &#8211;\u00a0<\/strong>(a) Deserts<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>(v) Ox bow lakes are found in:<br \/>\n<\/strong><\/span><span style=\"color: #000000;\">(a) Glaciers<br \/>\n<\/span><span style=\"color: #000000;\">(b) River valleys<br \/>\n<\/span><span style=\"color: #000000;\">(c) Deserts<br \/>\n<strong>Answer &#8211;\u00a0<\/strong>(b) River valleys<\/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) Glacier<\/span><\/td>\n<td><span style=\"color: #000000;\">(a) Sea shore<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"color: #000000;\">(ii) Meanders<\/span><\/td>\n<td><span style=\"color: #000000;\">(b) Mushroom rock<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"color: #000000;\">(iii) Beach<\/span><\/td>\n<td><span style=\"color: #000000;\">(c) River of ice<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"color: #000000;\">(iv) Sand dunes<\/span><\/td>\n<td><span style=\"color: #000000;\">(d) Rivers<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"color: #000000;\">(v) Waterfall<\/span><\/td>\n<td><span style=\"color: #000000;\">(e) Vibrations of earth<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"color: #000000;\">(vi) Earthquake<\/span><\/td>\n<td><span style=\"color: #000000;\">(f) Sea cliff<\/span><\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td><span style=\"color: #000000;\">(g) Hard bedrock<\/span><\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td><span style=\"color: #000000;\">(h) Deserts<\/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) Glacier<\/span><\/td>\n<td><span style=\"color: #000000;\">(c) River of ice<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"color: #000000;\">(ii) Meanders<\/span><\/td>\n<td><span style=\"color: #000000;\">(d) Rivers<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"color: #000000;\">(iii) Beach<\/span><\/td>\n<td><span style=\"color: #000000;\">(a) Sea shore<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"color: #000000;\">(iv) Sand dunes<\/span><\/td>\n<td><span style=\"color: #000000;\">(h) Deserts<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"color: #000000;\">(v) Waterfall<\/span><\/td>\n<td><span style=\"color: #000000;\">(g) Hard bedrock<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"color: #000000;\">(vi) Earthquake<\/span><\/td>\n<td><span style=\"color: #000000;\">(e) Vibrations of earth<\/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) Some rocks have the shape of a mushroom.<br \/>\n<\/strong><\/span><span style=\"color: #000000;\"><strong>Answer &#8211; <\/strong>Some rocks have a shape of a mushroom because winds erode the lower section of the rock more than the upper part. Therefore, such rocks have a narrower base and wider top.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>(ii) Flood plains are very fertile.<br \/>\n<\/strong><\/span><span style=\"color: #000000;\"><strong>Answer &#8211; <\/strong>Flood plains are formed by the deposition of fine soil and other material called sediments on the river banks. As the soil and sediments are brought by floodwater, they are very fertile.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>(iii) Sea caves are turned into stacks.<br \/>\n<\/strong><\/span><span style=\"color: #000000;\"><strong>Answer &#8211; <\/strong>When the cavities in the sea caves become bigger and bigger, only the roof of the caves are leftover, which forms sea arches. Further, due to erosion, the roof vanishes and only the walls stay intact, turning the sea caves into stacks.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><strong>(iv) Buildings collapse due to earthquakes.<br \/>\n<\/strong><\/span><span style=\"color: #000000;\"><strong>Answer &#8211; <\/strong>When the lithospheric plates move, the surface of the earth vibrates and then these vibrations travel outwards from the epicentre in the form of waves, which leads to sudden movement and results in the collapse of buildings.<\/span><\/p>\n<p>&nbsp;<\/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; 3 (Our Changing Earth) has been provided here to help the students in solving the questions from this exercise.\u00a0 Chapter &#8211; 3 (Our Changing Earth) Exercises 1. Answer the following questions. [&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":[221,248,249,245,5],"class_list":["post-1741","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-3-our-changing-earth","tag-ncert-solutions-class-7-social-science-geography-chapter-3-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 3 Our Changing Earth | 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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