{"id":3388,"date":"2022-12-13T06:14:50","date_gmt":"2022-12-13T06:14:50","guid":{"rendered":"https:\/\/5thclass.deltapublications.in\/?page_id=3388"},"modified":"2025-09-22T09:29:50","modified_gmt":"2025-09-22T09:29:50","slug":"s-15-a-earthquakes","status":"publish","type":"page","link":"https:\/\/5thclass.deltapublications.in\/index.php\/s-15-a-earthquakes\/","title":{"rendered":"s-15.a Earthquakes"},"content":{"rendered":"\n<h2 class=\"wp-block-heading has-text-align-center has-text-color\" style=\"color:#00056d;text-transform:uppercase\"><strong>Earthquakes<\/strong><\/h2>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<div style=\"position: relative; width: 100%; height: 0; padding-top: 56.2500%;\n padding-bottom: 0; box-shadow: 0 2px 8px 0 rgba(63,69,81,0.16); margin-top: 1.6em; margin-bottom: 0.9em; overflow: hidden;\n border-radius: 8px; will-change: transform;\">\n  <iframe loading=\"lazy\" style=\"position: absolute; width: 100%; height: 100%; top: 0; left: 0; border: none; padding: 0;margin: 0;\"\n    src=\"https:\/\/www.canva.com\/design\/DAGHVs52BKA\/3doQr1gAwYeYL72uvEVqSQ\/watch?embed\" allowfullscreen=\"allowfullscreen\" allow=\"fullscreen\">\n  <\/iframe>\n<\/div>\n<a href=\"https:&#x2F;&#x2F;www.canva.com&#x2F;design&#x2F;DAGHVs52BKA&#x2F;3doQr1gAwYeYL72uvEVqSQ&#x2F;watch?utm_content=DAGHVs52BKA&amp;utm_campaign=designshare&amp;utm_medium=embeds&amp;utm_source=link\" target=\"_blank\" rel=\"noopener\">earthquake<\/a> by Delta publications\n<\/div>\n<\/div>\n\n\n<div class=\"wp-block-image is-resized\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"360\" height=\"360\" src=\"https:\/\/5thclass.deltapublications.in\/wp-content\/uploads\/2023\/10\/image-removebg-preview-2023-10-16T175941.825.png\" alt=\"\" class=\"wp-image-8613\" srcset=\"https:\/\/5thclass.deltapublications.in\/wp-content\/uploads\/2023\/10\/image-removebg-preview-2023-10-16T175941.825.png 360w, https:\/\/5thclass.deltapublications.in\/wp-content\/uploads\/2023\/10\/image-removebg-preview-2023-10-16T175941.825-300x300.png 300w, https:\/\/5thclass.deltapublications.in\/wp-content\/uploads\/2023\/10\/image-removebg-preview-2023-10-16T175941.825-150x150.png 150w\" sizes=\"auto, (max-width: 360px) 100vw, 360px\" \/><\/figure><\/div>\n\n\n<p class=\"has-text-color has-huge-font-size\" style=\"color:#74008b\"><strong>Key Notes:<\/strong><\/p>\n\n\n\n<div class=\"wp-block-group has-large-font-size\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<p class=\"has-text-color\" style=\"color:#b00012\"><strong>1. What is an Earthquake?<\/strong><\/p>\n\n\n\n<p><br>&#8211; An earthquake is the shaking of the Earth&#8217;s surface caused by the sudden release of energy in the Earth&#8217;s crust.<br>&#8211; This energy release is usually the result of the movement of tectonic plates.<\/p>\n\n\n\n<p><strong>2. Causes of Earthquakes:<\/strong><br>&#8211; Most earthquakes are caused by the movement of tectonic plates.<br>&#8211; Earthquakes can also be triggered by volcanic activity, landslides, and human activities such as mining and reservoir-induced seismicity (from filling large reservoirs).<\/p>\n\n\n\n<p><strong>3. Tectonic Plate Movement:<\/strong><br>&#8211; Earth&#8217;s outer shell is divided into large pieces called tectonic plates.<br>&#8211; These plates are always moving, but they can get stuck along their boundaries. When they suddenly slip, it causes an earthquake.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><a href=\"https:\/\/www.usgs.gov\/media\/images\/normal-dip-slip-fault\"><img decoding=\"async\" src=\"https:\/\/d9-wret.s3.us-west-2.amazonaws.com\/assets\/palladium\/production\/s3fs-public\/styles\/side_image\/public\/thumbnails\/image\/eq-ed-fault-labeled.gif?itok=WoXCsT4H\" alt=\"cartoon of two blocks of offset earth crust at an angle\"\/><\/a><figcaption class=\"wp-element-caption\">A normal (dip-slip) fault is an inclined fracture&nbsp;where the rock&nbsp;mass&nbsp;above an inclined fault moves down (Public domain.)<\/figcaption><\/figure><\/div>\n\n\n<p><strong>4. Focus and Epicenter:<\/strong><br>&#8211; The point inside the Earth where the earthquake begins is called the &#8220;focus&#8221; or &#8220;hypocenter.&#8221;<br>&#8211; The point directly above the focus on the Earth&#8217;s surface is called the &#8220;epicenter.&#8221;<\/p>\n\n\n\n<p><strong>5. Seismic Waves:<\/strong><br>&#8211; Earthquake energy travels in the form of seismic waves.<br>&#8211; There are two main types of seismic waves: P-waves (Primary waves) and S-waves (Secondary waves).<\/p>\n\n\n\n<p><strong>6. Measuring Earthquakes:<\/strong><br>&#8211; Earthquakes are measured using instruments called seismometers.<br>&#8211; The magnitude scale most commonly used is the Richter scale.<\/p>\n\n\n\n<p><strong>7. Effects of Earthquakes:<\/strong><br>&#8211; Earthquakes can cause buildings and bridges to collapse, landslides, tsunamis, and damage to roads and infrastructure.<br>&#8211; People and animals can be injured or killed in earthquakes.<\/p>\n\n\n\n<p><strong>8. Safety Tips:<\/strong><br>&#8211; During an earthquake, &#8220;Drop, Cover, and Hold On&#8221; is a recommended safety action.<br>&#8211; After an earthquake, be cautious of aftershocks, and have an emergency kit ready.<\/p>\n\n\n\n<p><strong>9. Famous Earthquakes:<\/strong><br>&#8211; Some famous earthquakes include the 1906 San Francisco earthquake, the 2011 Tohoku earthquake and tsunami in Japan, and the 1994 Northridge earthquake in California.<\/p>\n\n\n\n<p><strong>10. Earthquake Preparedness:<\/strong><br>&#8211; Communities in earthquake-prone areas should have earthquake preparedness plans in place and build structures to withstand seismic activity.<\/p>\n\n\n\n<p class=\"has-text-color\" style=\"color:#d90000\"><strong>Let&#8217;s practice!<\/strong><\/p>\n<\/div><\/div>\n\n\n\n<p><a href=\"https:\/\/www.usgs.gov\/media\/images\/tectonic-plates-earth\"><\/a><\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/wordwall.net\/play\/82148\/670\/810\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/5thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-56.png\" alt=\"\" class=\"wp-image-5101\" srcset=\"https:\/\/5thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-56.png 500w, https:\/\/5thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-56-300x300.png 300w, https:\/\/5thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-56-150x150.png 150w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/wordwall.net\/play\/82933\/177\/205\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/5thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-58.png\" alt=\"\" class=\"wp-image-5102\" srcset=\"https:\/\/5thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-58.png 500w, https:\/\/5thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-58-300x300.png 300w, https:\/\/5thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-58-150x150.png 150w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><\/figure>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Earthquakes earthquake by Delta publications Key Notes: 1. What is an Earthquake? &#8211; An earthquake is the shaking of the Earth&#8217;s surface caused by the sudden release of energy in the Earth&#8217;s crust.&#8211; This energy release is usually the result of the movement of tectonic plates. 2. Causes of Earthquakes:&#8211; Most earthquakes are caused by<a class=\"more-link\" href=\"https:\/\/5thclass.deltapublications.in\/index.php\/s-15-a-earthquakes\/\">Continue reading <span class=\"screen-reader-text\">&#8220;s-15.a Earthquakes&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"class_list":["post-3388","page","type-page","status-publish","hentry","entry"],"_links":{"self":[{"href":"https:\/\/5thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3388","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/5thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/5thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/5thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/5thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/comments?post=3388"}],"version-history":[{"count":11,"href":"https:\/\/5thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3388\/revisions"}],"predecessor-version":[{"id":15904,"href":"https:\/\/5thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3388\/revisions\/15904"}],"wp:attachment":[{"href":"https:\/\/5thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/media?parent=3388"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}