{"id":286,"date":"2014-04-24T09:26:19","date_gmt":"2016-11-25T11:50:53","guid":{"rendered":"http:\/\/natgeokids.com?p=286"},"modified":"2019-10-31T15:35:33","modified_gmt":"2019-10-31T15:35:33","slug":"structure-of-the-earth","status":"publish","type":"post","link":"https:\/\/www.natgeokids.com\/uk\/discover\/geography\/physical-geography\/structure-of-the-earth\/","title":{"rendered":"Structure of the Earth!"},"content":{"rendered":"\n<p><strong>Get ready to dig deep, gang, and join us on a fascinating journey to the centre of the Earth&#8230;<\/strong><\/p>\n\n\n\n<p>The secrets buried inside our planet are revealed by recording and studying things called <strong>seismic waves<\/strong>. Caused by things like earthquakes, explosions and the movement of our oceans, there are two types of seismic wave \u2013 a <strong>shear wave<\/strong>, which won&#8217;t travel through liquid; and a <strong>pressure wave<\/strong>, which moves through both liquid and solids. These waves show that the Earth is made from five layers: the inner and outer core, the lower and upper mantle, and the crust.<\/p>\n\n\n<p><!-- \/wp:post-content --><\/p>\n<p><!-- wp:separator --><\/p>\n<hr class=\"wp-block-separator\" \/><!-- \/wp:separator -->\n<p>\u00a0<\/p>\n<p><!-- wp:heading {\"level\":3,\"align\":\"center\"} --><\/p>\n<h3 style=\"text-align: center;\"><em>Check out our magazine!<\/em><\/h3>\n<p><!-- \/wp:heading --><\/p>\n<p><!-- wp:image {\"id\":33392,\"align\":\"right\"} --><\/p>\n<div class=\"wp-block-image\">\n<figure class=\"alignright\"><img decoding=\"async\" width=\"318\" height=\"414\" class=\"wp-image-33392\" src=\"https:\/\/cdn.creatureandcoagency.com\/uploads\/2019\/10\/National-Geographic-Kids-magazine-content-break-2.jpg\" alt=\"\" srcset=\"https:\/\/cdn.creatureandcoagency.com\/uploads\/2019\/10\/National-Geographic-Kids-magazine-content-break-2.jpg 318w, https:\/\/cdn.creatureandcoagency.com\/uploads\/2019\/10\/National-Geographic-Kids-magazine-content-break-2-230x300.jpg 230w\" sizes=\"(max-width: 318px) 100vw, 318px\" \/><\/figure>\n<\/div>\n<p><!-- \/wp:image --><\/p>\n<p><!-- wp:paragraph {\"align\":\"left\"} --><\/p>\n<p style=\"text-align: left;\"><strong><em>National Geographic Kids is an exciting monthly read for planet-passionate boys and girls, aged 6-13!<\/em><\/strong><\/p>\n<p><!-- \/wp:paragraph --><\/p>\n<p><!-- wp:paragraph {\"align\":\"left\"} --><\/p>\n<p style=\"text-align: left;\"><em>Packed full of fun features, jaw-dropping facts and awe-inspiring photos \u2013 it&#8217;ll keep you entertained for hours! <\/em><\/p>\n<p><!-- \/wp:paragraph --><\/p>\n<p><!-- wp:paragraph {\"align\":\"left\"} --><\/p>\n<p style=\"text-align: left;\"><em>Find our magazine in all good newsagents, or become a subscriber and have it delivered to your door! Ask your parents to check out the &#8216;Subscribe&#8217; tab on our website!<\/em><\/p>\n<p><!-- \/wp:paragraph --><\/p>\n<p><!-- wp:heading {\"level\":6,\"align\":\"center\"} --><\/p>\n<h6 style=\"text-align: center;\">(AD)<\/h6>\n<p><!-- \/wp:heading --><\/p>\n<p><!-- wp:separator --><\/p>\n<hr class=\"wp-block-separator\" \/><!-- \/wp:separator -->\n<p>\u00a0<\/p>\n<p><!-- wp:paragraph --><\/p>\n<p><a href=\"http:\/\/www.natgeokids.com\/wp-content\/uploads\/2014\/04\/structure-of-the-earth-.jpg\"><img decoding=\"async\" class=\"wp-image-3696 aligncenter\" src=\"http:\/\/www.natgeokids.com\/wp-content\/uploads\/2014\/04\/structure-of-the-earth-.jpg\" alt=\"structure of the earth\" width=\"404\" height=\"403\" srcset=\"https:\/\/cdn.creatureandcoagency.com\/uploads\/2014\/04\/structure-of-the-earth-.jpg 590w, https:\/\/cdn.creatureandcoagency.com\/uploads\/2014\/04\/structure-of-the-earth--300x300.jpg 300w, https:\/\/cdn.creatureandcoagency.com\/uploads\/2014\/04\/structure-of-the-earth--150x150.jpg 150w, https:\/\/cdn.creatureandcoagency.com\/uploads\/2014\/04\/structure-of-the-earth--50x50.jpg 50w\" sizes=\"(max-width: 404px) 100vw, 404px\" \/><\/a><\/p>\n<h2><span style=\"text-decoration: underline;\">Inner Core<\/span><\/h2>\n<p><span style=\"letter-spacing: 0px;\"><strong>Temperature:\u00a0<\/strong><\/span><span style=\"letter-spacing: 0.0px;\">5,000\u00b0C &#8211; 6,000\u00b0C<br \/><\/span><span style=\"letter-spacing: 0px;\"><strong>State<\/strong><\/span><span style=\"letter-spacing: 0.0px;\">: Solid<br \/><\/span><span style=\"letter-spacing: 0px;\"><strong>Composition<\/strong><\/span><span style=\"letter-spacing: 0.0px;\">: iron and nickel<\/span><\/p>\n<p><span style=\"letter-spacing: 0.0px;\">The Earth\u2019s inner core is a huge metal ball, <strong>2,500km<\/strong> wide. Made mainly of iron, the temperature of the ball is <strong>5,000\u00b0C<\/strong> to <strong>6,000\u00b0C<\/strong> \u2013 that\u2019s up to 6,000 times hotter than our atmosphere and scorching enough to make metal melt! The metal at the inner core stays solid because of the incredible pressure surrounding it.<\/span><\/p>\n<h2><span style=\"text-decoration: underline;\">Outer Core<\/span><\/h2>\n<p><b>Temperature<\/b>: 4,000\u00b0C \u2013 6,000\u00b0C<br \/><b>State<\/b>: Liquid<br \/><b>Composition<\/b>: iron, nickel, sulphur and oxygen<\/p>\n<p>This liquid layer of iron and nickel is <b>5,150km<\/b> deep. The outer core flows around the centre of the Earth, and the movement of the metals creates our planet\u2019s magnetic field.<\/p>\n<h2><span style=\"text-decoration: underline;\">Lower Mantle<\/span><\/h2>\n<p><span style=\"letter-spacing: 0px;\"><strong>Temperature<\/strong><\/span><span style=\"letter-spacing: 0.0px;\">: 3,000\u00b0C<br \/><\/span><span style=\"letter-spacing: 0px;\"><strong>State<\/strong><\/span><span style=\"letter-spacing: 0.0px;\">: solid<br \/><strong>Composition<\/strong>: iron, oxygen, silicon, magnesium and aluminium<\/span><\/p>\n<p><span style=\"letter-spacing: 0.0px;\">The lower mantle is found between <strong>670km<\/strong> and <strong>2,890km<\/strong> below the surface, and is made from solid rock. The rock is hot enough to melt, but is solid because of the pressure pushing down on it.<\/span><\/p>\n<h2><span style=\"text-decoration: underline;\">Upper Mantle<\/span><\/h2>\n<p><b>Temperature<\/b>: 1,400\u00b0C \u2013 3,000\u00b0C<br \/><b>State<\/b>: liquid \/ solid<br \/><b>Composition<\/b>: iron, oxygen, silicon, magnesium and aluminium<\/p>\n<p>This layer is up to<b> 670km<\/b> below the Earth\u2019s surface. The lower part of the upper mantle is made from both solid and melted rock (liquid), while the rock in the upper region is stiffer, because it\u2019s cooler.<\/p>\n<h2><span style=\"text-decoration: underline;\">Crust<\/span><\/h2>\n<p><b>Temperature<\/b>: Around 22\u00b0C<br \/><b>State<\/b>: Solid<br \/><b>Composition<\/b>: <em>Oceanic crust<\/em> made up of iron, oxygen, silicon, magnesium and aluminium.<br \/><em>Continental crust<\/em> made up of granite, sedimentary rocks and metamorphic\u00a0rocks.<\/p>\n<p>The Earth&#8217;s surface is covered by its thinnest layer, the crust. Land is made of <b>continental crust<\/b>, which is <b>8km<\/b> to <b>70km<\/b> thick and made mostly from a rock called granite. The layer beneath the ocean bed is made of <b>oceanic crust<\/b>, which is about <b>8km<\/b> thick and made mainly from a rock called basalt.<\/p>\n<p><a href=\"http:\/\/www.natgeokids.com\/wp-content\/uploads\/2014\/04\/structure-of-the-earth-\u2013-earths-crust.jpg\"><img decoding=\"async\" class=\"wp-image-3697 aligncenter\" src=\"http:\/\/www.natgeokids.com\/wp-content\/uploads\/2014\/04\/structure-of-the-earth-\u2013-earths-crust.jpg\" alt=\"structure of the earth\" width=\"584\" height=\"370\" srcset=\"https:\/\/cdn.creatureandcoagency.com\/uploads\/2014\/04\/structure-of-the-earth-\u2013-earths-crust.jpg 635w, https:\/\/cdn.creatureandcoagency.com\/uploads\/2014\/04\/structure-of-the-earth-\u2013-earths-crust-300x190.jpg 300w\" sizes=\"(max-width: 584px) 100vw, 584px\" \/><\/a><\/p>\n<p>\u00a0<\/p>\n<p style=\"text-align: center;\"><a href=\"http:\/\/www.natgeokids.com\/wp-content\/uploads\/2014\/04\/structure-of-the-earth-fact.jpg\"><img decoding=\"async\" class=\"size-full wp-image-3698 aligncenter\" src=\"http:\/\/www.natgeokids.com\/wp-content\/uploads\/2014\/04\/structure-of-the-earth-fact.jpg\" alt=\"structure of the earth\" width=\"200\" height=\"198\" srcset=\"https:\/\/cdn.creatureandcoagency.com\/uploads\/2014\/04\/structure-of-the-earth-fact.jpg 200w, https:\/\/cdn.creatureandcoagency.com\/uploads\/2014\/04\/structure-of-the-earth-fact-150x150.jpg 150w, https:\/\/cdn.creatureandcoagency.com\/uploads\/2014\/04\/structure-of-the-earth-fact-50x50.jpg 50w\" sizes=\"(max-width: 200px) 100vw, 200px\" \/><\/a><\/p>\n<h4 style=\"text-align: center;\">By studying rocks and meteorites (rocks from <strong><a href=\"https:\/\/www.natgeokids.com\/uk\/discover\/science\/space\/ten-facts-about-space\/\" target=\"_blank\" rel=\"noopener noreferrer\">space<\/a><\/strong>), scientists\u00a0believe the Earth is\u00a0about 4.5 billion\u00a0years old!<\/h4>\n<h6>Illustration: Getty Images UK<\/h6>","protected":false},"excerpt":{"rendered":"<p>Get ready to dig deep, gang, and join us on a fascinating journey to the centre of the Earth&#8230; The secrets buried inside our planet are revealed by recording and studying things called seismic waves. Caused by things like earthquakes, explosions and the movement of our oceans, there are two types of seismic wave \u2013 &hellip; <a href=\"https:\/\/www.natgeokids.com\/uk\/discover\/geography\/physical-geography\/structure-of-the-earth\/\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">Structure of the Earth!<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":3699,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[25],"tags":[464,463,462],"christmas-category":[],"class_list":["post-286","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-physical-geography","tag-earth-facts","tag-earth-structure","tag-structure-of-the-earth","countries-australia","countries-ireland","countries-new-zealand","countries-south-africa","countries-united-kingdom"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Structure of the Earth! - National Geographic Kids<\/title>\n<meta name=\"description\" content=\"Learn all about the structure of the Earth here at National Geographic Kids! 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