{"id":10811,"date":"2018-02-20T16:31:45","date_gmt":"2018-02-20T11:01:45","guid":{"rendered":"http:\/\/mycbseguide.com\/blog\/?p=10811"},"modified":"2019-01-29T12:23:08","modified_gmt":"2019-01-29T06:53:08","slug":"natural-phenomena-class-8-notes-science","status":"publish","type":"post","link":"https:\/\/mycbseguide.com\/blog\/natural-phenomena-class-8-notes-science\/","title":{"rendered":"Some Natural Phenomena class 8 Notes Science"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_76 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/mycbseguide.com\/blog\/natural-phenomena-class-8-notes-science\/#Some_Natural_Phenomena_class_8_Notes_Science\" >Some Natural Phenomena class 8 Notes Science<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/mycbseguide.com\/blog\/natural-phenomena-class-8-notes-science\/#CBSE_Class_8_Science_Revision_Notes_Chapter_15_Some_Natural_Phenomena\" >CBSE Class 8 Science\u00a0Revision Notes Chapter 15\u00a0Some Natural Phenomena<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/mycbseguide.com\/blog\/natural-phenomena-class-8-notes-science\/#Protective_measures_for_earthquake\" >Protective measures for earthquake:<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/mycbseguide.com\/blog\/natural-phenomena-class-8-notes-science\/#CBSE_Class_8_Revision_Notes_and_Key_Points\" >CBSE Class 8 Revision Notes and Key Points<\/a><\/li><\/ul><\/nav><\/div>\n<p><strong>Natural Phenomena class 8 Notes Science<\/strong> in PDF are available for free download in myCBSEguide mobile app. The best app for CBSE students now provides Some Natural Phenomena class 8 Notes Science latest chapter wise notes for quick preparation of CBSE exams and school based annual examinations. Class 8 Science notes on chapter 15 Some Natural Phenomena Science are also available for download in CBSE Guide website.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Some_Natural_Phenomena_class_8_Notes_Science\"><\/span>Some Natural Phenomena class 8 Notes Science<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Download CBSE class 8th revision notes for chapter 15 Some Natural Phenomena in PDF format for free. Download revision notes for Some Natural Phenomena class 8 Notes and score high in exams. These are the Some Natural Phenomena class 8 Notes prepared by team of expert teachers. The revision notes help you revise the whole chapter 15 in minutes. Revision notes in exam days is one of the best tips recommended by teachers during exam days.<\/p>\n<p style=\"text-align: center;\"><strong>Revision Notes for class 8 Science\u00a0<a class=\"button\" href=\"https:\/\/mycbseguide.com\/downloads\/cbse-class-08-science\/1466\/cbse-revision-notes\/7\/\">Download as PDF<\/a><\/strong><\/p>\n<h2><span class=\"ez-toc-section\" id=\"CBSE_Class_8_Science_Revision_Notes_Chapter_15_Some_Natural_Phenomena\"><\/span><b>CBSE Class 8 Science\u00a0Revision Notes Chapter 15\u00a0<\/b><b>Some Natural Phenomena<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Some objects can be charged by rubbing with other objects.<\/p>\n<p>There are two kinds of charges \u2014 positive charge and negative charge<\/p>\n<p>Like charges repel and unlike charges attract each other.<\/p>\n<p>The electrical charges produced by rubbing are called static charges.<\/p>\n<p>When charges move, they constitute an electric current.<\/p>\n<p>An electroscope may be used to detect whether a body is charged or not.<\/p>\n<p>The process of transfer of charge from a charged object to the earth is called earthing.<\/p>\n<p>The process of electric discharge between clouds and the earth or between different clouds causes lightning. The formation of clouds involves friction between water droplets in the atmosphere. The friction charges the particles in the atmosphere. The negative charges accumulate at the bottom of the cloud and the positive charges at the top. As the accumulation of the charges increases, the cloud will induce positive charges on the ground nearby. As the amount of charge increases, the negative charges on the cloud tend to make a path towards the ground, and it results in a narrow streak of electrical discharge, which we call lightning.<\/p>\n<p>Lightning strike could destroy life and property. Protective measures are of utmost importance during lightning strikes. Taking shelter in interiors(house or other closed places) and vehicles(closed e.g. cars)\u00a0are the most preferred measures.<\/p>\n<p>Lightning conductors can protect buildings from the effects of lightning.<\/p>\n<p>A natural phenomenon that cannot be predicted is an <strong>earthquake.<\/strong> The earth consists of three major layers, called<strong> the crust, the mantle and the core.\u00a0<\/strong>The core is further divided into the inner core and the outer core. The mantle consists of semi-solid material above which the crust floats. The crust consists of oceans and continents.<\/p>\n<p>The<strong> crust<\/strong> is divided into several parts, called <strong>tectonic plates<\/strong>. The regions where one tectonic plate slides against another are referred to as<strong> fault zones<\/strong>, and these are the regions where an earthquake is likely to occur. Hence, these zones are referred to as <strong>seismic zones.<\/strong><\/p>\n<p>The place in the interior of the earth where an earthquake occurs is the<strong> focus<\/strong>, and the region on the surface of the earth that is the closest to focus is likely to experience the largest damage. This region is called the <strong>epicenter <\/strong>of the earthquake.<\/p>\n<p>The instrument that measures the severity of an earthquake is a <strong>seismograph<\/strong>. It basically consists of a drum that rolls and a pendulum with a stylus that traces the waves of an earthquake on a sheet like a graph paper.\u00a0The energy released at the focus of an earthquake, propagates outwardly in form of waves known as <strong>seismic waves.<\/strong><\/p>\n<p>Destructive energy of an earthquake is measured on the <strong>Richter scale.<\/strong> It is a\u00a0logarithmic scale, ranging from 1 to 10 for indicating the intensity of an earthquake. The earthquake measuring 7 or more on Richter scale can cause severe damage to life and property.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Protective_measures_for_earthquake\"><\/span><strong>Protective measures for earthquake:<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>1. If you are at home:<br \/>\nTake shelter under a table and stay there till shaking stops.<br \/>\nStay away from tall and heavy objects that may fall on you.<br \/>\nIf you are in bed, do not get up. Protect your head with a pillow.<\/p>\n<p>2. If you are outdoors:<br \/>\nFind a clear spot, away from buildings, trees and overhead power lines. Drop to the ground.<br \/>\nIf you are in a car or a bus, do not come out. Ask the driver to drive slowly to a clear spot. Do not come out till the tremors stop.<\/p>\n<p>Moreover, it is advisable to make the structure of buildings simple so that they are\u00a0\u2018Quake Safe\u2019.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"CBSE_Class_8_Revision_Notes_and_Key_Points\"><\/span><strong>CBSE Class 8 Revision Notes and Key Points<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Some Natural Phenomena class 8 Notes Science. CBSE quick revision note for class-8 Science, Chemistry, Maths, Biology, and other subject are very helpful to revise the whole syllabus during exam days. The revision notes covers all important formulas and concepts given in the chapter. Even if you wish to have an overview of a chapter, quick revision notes are here to do if for you. These notes will certainly save your time during stressful exam days.<\/p>\n<ul>\n<li><a href=\"http:\/\/mycbseguide.com\/downloads\/cbse-class-08-mathematics\/1449\/cbse-revision-notes\/7\/\">Mathematics<\/a><\/li>\n<li><a href=\"http:\/\/mycbseguide.com\/downloads\/cbse-class-08-science\/1466\/cbse-revision-notes\/7\/\">Science<\/a><\/li>\n<li><a href=\"http:\/\/mycbseguide.com\/downloads\/cbse-class-08-social-science\/1485\/cbse-revision-notes\/7\/\">Social Science<\/a><\/li>\n<\/ul>\n<p>To download Some Natural Phenomena class 8 Notes Science, sample paper for class 8 Science, Social Science, Science, Science; do check myCBSEguide app or website. myCBSEguide provides sample papers with solution, test papers for chapter-wise practice, NCERT solutions, NCERT Exemplar solutions, quick revision notes for ready reference, CBSE guess papers and CBSE important question papers. Sample Paper all are made available through\u00a0<a href=\"https:\/\/play.google.com\/store\/apps\/details?id=in.techchefs.MyCBSEGuide&amp;referrer=utm_source%3Dmycbse_bottom%26utm_medium%3Dtext%26utm_campaign%3Dmycbseads\"><strong>the best app for CBSE students<\/strong><\/a>\u00a0and myCBSEguide website.<\/p>\n<ul>\n<li class=\"entry-title\"><a href=\"https:\/\/mycbseguide.com\/blog\/10779-2\/\">Crop Production and Management class 8 Notes Science<\/a><\/li>\n<li class=\"entry-title\"><a href=\"https:\/\/mycbseguide.com\/blog\/microorganisms-class-8-notes-science\/\">Microorganisms class 8 Notes Science<\/a><\/li>\n<li class=\"entry-title\"><a href=\"https:\/\/mycbseguide.com\/blog\/synthetic-fibres-plastics-class-8-notes-science\/\">Synthetic Fibres and Plastics class 8 Notes Science<\/a><\/li>\n<li class=\"entry-title\"><a href=\"https:\/\/mycbseguide.com\/blog\/materials-metals-non-metals-class-8-notes-science\/\">Materials: Metals and Non-Metals class 8 Notes Science<\/a><\/li>\n<li class=\"entry-title\"><a href=\"https:\/\/mycbseguide.com\/blog\/coal-petroleum-class-8-notes-science\/\">Coal and Petroleum class 8 Notes Science<\/a><\/li>\n<li class=\"entry-title\"><a href=\"https:\/\/mycbseguide.com\/blog\/combustion-flame-class-8-notes-science\/\">Combustion and Flame class 8 Notes Science<\/a><\/li>\n<li class=\"entry-title\"><a href=\"https:\/\/mycbseguide.com\/blog\/conservation-plants-animals-class-8-notes-science\/\">Conservation of Plants and Animals class 8 Notes Science<\/a><\/li>\n<li class=\"entry-title\"><a href=\"https:\/\/mycbseguide.com\/blog\/cell-structure-functions-class-8-notes-science\/\">Cell-Structure and Functions class 8 Notes Science<\/a><\/li>\n<li class=\"entry-title\"><a href=\"https:\/\/mycbseguide.com\/blog\/reproduction-animals-class-8-notes-science\/\">Reproduction in Animals class 8 Notes Science<\/a><\/li>\n<li class=\"entry-title\"><a href=\"https:\/\/mycbseguide.com\/blog\/reaching-age-adolescence-class-8-notes-science\/\">Reaching the age of Adolescence class 8 Notes Science<\/a><\/li>\n<li class=\"entry-title\"><a href=\"https:\/\/mycbseguide.com\/blog\/force-pressure-class-8-notes-science\/\">Force and Pressure class 8 Notes Science<\/a><\/li>\n<li class=\"entry-title\"><a href=\"https:\/\/mycbseguide.com\/blog\/friction-class-8-notes-science\/\">Friction class 8 Notes Science<\/a><\/li>\n<li class=\"entry-title\"><a href=\"https:\/\/mycbseguide.com\/blog\/sound-class-8-notes-science\/\">Sound class 8 Notes Science<\/a><\/li>\n<li class=\"entry-title\"><a href=\"https:\/\/mycbseguide.com\/blog\/chemical-effects-electric-current-class-8-notes-science\/\">Chemical Effects of Electric Current class 8 Notes Science<\/a><\/li>\n<li class=\"entry-title\"><a href=\"https:\/\/mycbseguide.com\/blog\/light-class-8-notes-science\/\">Light class 8 Notes Science<\/a><\/li>\n<li class=\"entry-title\"><a href=\"https:\/\/mycbseguide.com\/blog\/stars-solar-system-class-8-notes-science\/\">Stars and the Solar System class 8 Notes Science<\/a><\/li>\n<li class=\"entry-title\"><a href=\"https:\/\/mycbseguide.com\/blog\/pollution-air-water-class-8-notes-science\/\">Pollution of Air and Water class 8 Notes Science<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Natural Phenomena class 8 Notes Science in PDF are available for free download in myCBSEguide mobile app. The best app for CBSE students now provides Some Natural Phenomena class 8 Notes Science latest chapter wise notes for quick preparation of CBSE exams and school based annual examinations. Class 8 Science notes on chapter 15 Some &#8230; <a title=\"Some Natural Phenomena class 8 Notes Science\" class=\"read-more\" href=\"https:\/\/mycbseguide.com\/blog\/natural-phenomena-class-8-notes-science\/\" aria-label=\"More on Some Natural Phenomena class 8 Notes Science\">Read more<\/a><\/p>\n","protected":false},"author":2,"featured_media":10780,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[293,456],"tags":[457,150,1541,426,240,962,975],"class_list":["post-10811","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cbse-class-08","category-revision-notes","tag-cbse-notes","tag-cbse-notes-and-key-points","tag-cbse-revision-notes","tag-quick-revision","tag-quick-revision-notes","tag-science-notes","tag-some-natural-phenomena"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Some Natural Phenomena class 8 Notes Science | myCBSEguide<\/title>\n<meta name=\"description\" content=\"Some Natural Phenomena class 8 Notes Science chapter 15 in PDF format for free download. 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