{"id":92252,"date":"2025-06-01T11:19:03","date_gmt":"2025-06-01T11:19:03","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=92252"},"modified":"2025-06-01T11:19:03","modified_gmt":"2025-06-01T11:19:03","slug":"consider-the-following-statements-with-respect-to-the-asthenosphere","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/consider-the-following-statements-with-respect-to-the-asthenosphere\/","title":{"rendered":"Consider the following statements with respect to the &#8216;asthenosphere&#8217;"},"content":{"rendered":"<p>Consider the following statements with respect to the &#8216;asthenosphere&#8217; :<\/p>\n<ul>\n<li>1. It extends from the lower crust to the upper mantle.<\/li>\n<li>2. It is the main source of the magma that finds its way to the surface of the Earth during volcanic eruptions.<\/li>\n<\/ul>\n<p>Which of the statements given above is\/are correct?<\/p>\n<p>[amp_mcq option1=&#8221;1 only&#8221; option2=&#8221;2 only&#8221; option3=&#8221;Both 1 and 2&#8243; option4=&#8221;Neither 1 nor 2&#8243; correct=&#8221;option2&#8243;]<\/p>\n<div class=\"psc-box-pyq-exam-year-detail\">\n<div class=\"pyq-exam\">\n<div class=\"psc-heading\">This question was previously asked in<\/div>\n<div class=\"psc-title line-ellipsis\">UPSC CBI DSP LDCE &#8211; 2023<\/div>\n<\/div>\n<div class=\"pyq-exam-psc-buttons\"><a href=\"\/pyq\/pyq-upsc-cbi-dsp-ldce-2023.pdf\" target=\"_blank\" class=\"psc-pdf-button\" rel=\"noopener\">Download PDF<\/a><a href=\"\/pyq-upsc-cbi-dsp-ldce-2023\" target=\"_blank\" class=\"psc-attempt-button\" rel=\"noopener\">Attempt Online<\/a><\/div>\n<\/div>\n<section id=\"pyq-correct-answer\">\nStatement 2 correctly identifies the asthenosphere as a major source of magma, while Statement 1 inaccurately describes its location.<br \/>\n<\/section>\n<section id=\"pyq-key-points\">\nThe asthenosphere is the highly viscous, mechanically weak and ductile region of the upper mantle, below the lithosphere. It extends roughly from about 100 km to 400 km depth. Statement 1 is incorrect because the asthenosphere is entirely within the upper mantle and does not extend into the lower crust. Statement 2 is correct because partial melting occurs within the asthenosphere due to its temperature and pressure conditions, generating magma that contributes to volcanic activity.<br \/>\n<\/section>\n<section id=\"pyq-additional-information\">\nThe lithosphere, which comprises the rigid crust and uppermost part of the mantle, floats on the ductile asthenosphere. The movement of tectonic plates (parts of the lithosphere) is facilitated by the plastic flow within the asthenosphere.<br \/>\n<\/section>\n","protected":false},"excerpt":{"rendered":"<p>Consider the following statements with respect to the &#8216;asthenosphere&#8217; : 1. It extends from the lower crust to the upper mantle. 2. It is the main source of the magma that finds its way to the surface of the Earth during volcanic eruptions. Which of the statements given above is\/are correct? [amp_mcq option1=&#8221;1 only&#8221; option2=&#8221;2 &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"Consider the following statements with respect to the &#8216;asthenosphere&#8217;\" class=\"read-more button\" href=\"https:\/\/exam.pscnotes.com\/mcq\/consider-the-following-statements-with-respect-to-the-asthenosphere\/#more-92252\">Detailed Solution<span class=\"screen-reader-text\">Consider the following statements with respect to the &#8216;asthenosphere&#8217;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1086],"tags":[1105,1144,1106],"class_list":["post-92252","post","type-post","status-publish","format-standard","hentry","category-upsc-cbi-dsp-ldce","tag-1105","tag-rocks-and-earth-sciences","tag-world-and-physical-geography","no-featured-image-padding"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.2 (Yoast SEO v23.3) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Consider the following statements with respect to the &#039;asthenosphere&#039;<\/title>\n<meta name=\"description\" content=\"Statement 2 correctly identifies the asthenosphere as a major source of magma, while Statement 1 inaccurately describes its location. The asthenosphere is the highly viscous, mechanically weak and ductile region of the upper mantle, below the lithosphere. It extends roughly from about 100 km to 400 km depth. Statement 1 is incorrect because the asthenosphere is entirely within the upper mantle and does not extend into the lower crust. Statement 2 is correct because partial melting occurs within the asthenosphere due to its temperature and pressure conditions, generating magma that contributes to volcanic activity.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/exam.pscnotes.com\/mcq\/consider-the-following-statements-with-respect-to-the-asthenosphere\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Consider the following statements with respect to the &#039;asthenosphere&#039;\" \/>\n<meta property=\"og:description\" content=\"Statement 2 correctly identifies the asthenosphere as a major source of magma, while Statement 1 inaccurately describes its location. The asthenosphere is the highly viscous, mechanically weak and ductile region of the upper mantle, below the lithosphere. It extends roughly from about 100 km to 400 km depth. Statement 1 is incorrect because the asthenosphere is entirely within the upper mantle and does not extend into the lower crust. Statement 2 is correct because partial melting occurs within the asthenosphere due to its temperature and pressure conditions, generating magma that contributes to volcanic activity.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/consider-the-following-statements-with-respect-to-the-asthenosphere\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T11:19:03+00:00\" \/>\n<meta name=\"author\" content=\"rawan239\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"rawan239\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Consider the following statements with respect to the 'asthenosphere'","description":"Statement 2 correctly identifies the asthenosphere as a major source of magma, while Statement 1 inaccurately describes its location. The asthenosphere is the highly viscous, mechanically weak and ductile region of the upper mantle, below the lithosphere. It extends roughly from about 100 km to 400 km depth. Statement 1 is incorrect because the asthenosphere is entirely within the upper mantle and does not extend into the lower crust. Statement 2 is correct because partial melting occurs within the asthenosphere due to its temperature and pressure conditions, generating magma that contributes to volcanic activity.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/exam.pscnotes.com\/mcq\/consider-the-following-statements-with-respect-to-the-asthenosphere\/","og_locale":"en_US","og_type":"article","og_title":"Consider the following statements with respect to the 'asthenosphere'","og_description":"Statement 2 correctly identifies the asthenosphere as a major source of magma, while Statement 1 inaccurately describes its location. The asthenosphere is the highly viscous, mechanically weak and ductile region of the upper mantle, below the lithosphere. It extends roughly from about 100 km to 400 km depth. Statement 1 is incorrect because the asthenosphere is entirely within the upper mantle and does not extend into the lower crust. Statement 2 is correct because partial melting occurs within the asthenosphere due to its temperature and pressure conditions, generating magma that contributes to volcanic activity.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/consider-the-following-statements-with-respect-to-the-asthenosphere\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T11:19:03+00:00","author":"rawan239","twitter_card":"summary_large_image","twitter_misc":{"Written by":"rawan239","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/exam.pscnotes.com\/mcq\/consider-the-following-statements-with-respect-to-the-asthenosphere\/","url":"https:\/\/exam.pscnotes.com\/mcq\/consider-the-following-statements-with-respect-to-the-asthenosphere\/","name":"Consider the following statements with respect to the 'asthenosphere'","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T11:19:03+00:00","dateModified":"2025-06-01T11:19:03+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"Statement 2 correctly identifies the asthenosphere as a major source of magma, while Statement 1 inaccurately describes its location. The asthenosphere is the highly viscous, mechanically weak and ductile region of the upper mantle, below the lithosphere. It extends roughly from about 100 km to 400 km depth. Statement 1 is incorrect because the asthenosphere is entirely within the upper mantle and does not extend into the lower crust. Statement 2 is correct because partial melting occurs within the asthenosphere due to its temperature and pressure conditions, generating magma that contributes to volcanic activity.","breadcrumb":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/consider-the-following-statements-with-respect-to-the-asthenosphere\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/exam.pscnotes.com\/mcq\/consider-the-following-statements-with-respect-to-the-asthenosphere\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/exam.pscnotes.com\/mcq\/consider-the-following-statements-with-respect-to-the-asthenosphere\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/exam.pscnotes.com\/mcq\/"},{"@type":"ListItem","position":2,"name":"UPSC CBI DSP LDCE","item":"https:\/\/exam.pscnotes.com\/mcq\/category\/upsc-cbi-dsp-ldce\/"},{"@type":"ListItem","position":3,"name":"Consider the following statements with respect to the &#8216;asthenosphere&#8217;"}]},{"@type":"WebSite","@id":"https:\/\/exam.pscnotes.com\/mcq\/#website","url":"https:\/\/exam.pscnotes.com\/mcq\/","name":"MCQ and Quiz for Exams","description":"","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/exam.pscnotes.com\/mcq\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209","name":"rawan239","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/761a7274f9cce048fa5b921221e7934820d74514df93ef195a9d22af0c1c9001?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/761a7274f9cce048fa5b921221e7934820d74514df93ef195a9d22af0c1c9001?s=96&d=mm&r=g","caption":"rawan239"},"sameAs":["https:\/\/exam.pscnotes.com"],"url":"https:\/\/exam.pscnotes.com\/mcq\/author\/rawan239\/"}]}},"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/92252","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/comments?post=92252"}],"version-history":[{"count":0,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/92252\/revisions"}],"wp:attachment":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/media?parent=92252"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/categories?post=92252"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/tags?post=92252"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}