{"id":203312,"date":"2025-03-19T05:08:35","date_gmt":"2025-03-19T05:08:35","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=203312"},"modified":"2025-03-19T05:08:38","modified_gmt":"2025-03-19T05:08:38","slug":"how-do-continental-crust-and-oceanic-crust-differ","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/03\/19\/how-do-continental-crust-and-oceanic-crust-differ\/","title":{"rendered":"How do continental crust and oceanic crust differ"},"content":{"rendered":"\n

How do continental crust and oceanic crust differ?
Check all that apply.
A Continental crust is composed of granite; oceanic crust is composed of basalt.
B Continental crust is less dense than oceanic crust.
C Continental crust is thicker than oceanic crust.
D ceanic crust is composed of granite; continental crust is composed of basalt.
E ceanic crust is thicker than continental crust.
F ceanic crust is less dense than continental crust.<\/p>\n\n\n\n

The correct answer and explanation is :<\/strong><\/mark><\/p>\n\n\n\n

The correct answers are:
\u2705 A<\/strong> Continental crust is composed of granite; oceanic crust is composed of basalt.
\u2705 B<\/strong> Continental crust is less dense than oceanic crust.
\u2705 C<\/strong> Continental crust is thicker than oceanic crust.<\/p>\n\n\n\n

Explanation:<\/h3>\n\n\n\n

The Earth’s crust is divided into two main types: continental crust<\/strong> and oceanic crust<\/strong>. These two differ in composition, density, and thickness.<\/p>\n\n\n\n

    \n
  1. Composition<\/strong><\/li>\n<\/ol>\n\n\n\n
      \n
    • Continental crust is primarily composed of granite<\/strong>, which is rich in silica and aluminum (often referred to as “sial”).<\/li>\n\n\n\n
    • Oceanic crust is primarily composed of basalt<\/strong>, which is richer in iron and magnesium (called “sima”).<\/li>\n\n\n\n
    • This makes continental crust lighter in color and less dense compared to the darker, denser basaltic oceanic crust.<\/li>\n<\/ul>\n\n\n\n
        \n
      1. Density<\/strong><\/li>\n<\/ol>\n\n\n\n
          \n
        • Continental crust is less dense<\/strong> than oceanic crust.<\/li>\n\n\n\n
        • The density of continental crust averages 2.7 g\/cm\u00b3<\/strong>, whereas oceanic crust is denser, averaging 3.0 g\/cm\u00b3<\/strong>.<\/li>\n\n\n\n
        • Because of this difference, oceanic crust tends to sink below continental crust during subduction at tectonic plate boundaries.<\/li>\n<\/ul>\n\n\n\n
            \n
          1. Thickness<\/strong><\/li>\n<\/ol>\n\n\n\n
              \n
            • Continental crust is thicker<\/strong>, averaging 30\u201350 km<\/strong>, and in some mountainous regions, it can be over 70 km thick<\/strong>.<\/li>\n\n\n\n
            • Oceanic crust is thinner<\/strong>, typically around 5\u201310 km<\/strong> thick.<\/li>\n<\/ul>\n\n\n\n

              Incorrect Options:<\/h3>\n\n\n\n

              \u274c D<\/strong> Oceanic crust is composed of basalt<\/strong>, not granite.
              \u274c E<\/strong> Oceanic crust is thinner<\/strong>, not thicker than continental crust.
              \u274c F<\/strong> Oceanic crust is denser<\/strong>, not less dense than continental crust.<\/p>\n\n\n\n

              These differences are crucial in understanding plate tectonics, earthquakes, and the formation of geological features like mountains and ocean trenches.<\/p>\n","protected":false},"excerpt":{"rendered":"

              How do continental crust and oceanic crust differ?Check all that apply.A Continental crust is composed of granite; oceanic crust is composed of basalt.B Continental crust is less dense than oceanic crust.C Continental crust is thicker than oceanic crust.D ceanic crust is composed of granite; continental crust is composed of basalt.E ceanic crust is thicker than […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-203312","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/203312","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=203312"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/203312\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=203312"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=203312"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=203312"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}