{"id":89525,"date":"2025-06-01T10:06:21","date_gmt":"2025-06-01T10:06:21","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=89525"},"modified":"2025-06-01T10:06:21","modified_gmt":"2025-06-01T10:06:21","slug":"why-does-the-earth-assume-the-shape-of-an-oblate-ellipsoid","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/why-does-the-earth-assume-the-shape-of-an-oblate-ellipsoid\/","title":{"rendered":"Why does the Earth assume the shape of an oblate ellipsoid?"},"content":{"rendered":"

Why does the Earth assume the shape of an oblate ellipsoid?<\/p>\n

[amp_mcq option1=”The Earth\u2019s rotation causes the Earth to bulge slightly at the equator and flatten at the poles” option2=”The Earth\u2019s rotation causes the Earth to bulge slightly at the poles and flatten at the equator” option3=”The Earth\u2019s revolution causes the Earth to bulge slightly at the equator and flatten at the poles” option4=”The Earth\u2019s revolution causes the Earth to bulge slightly at the poles and flatten at the equator” correct=”option1″]<\/p>\n

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This question was previously asked in<\/div>\n
UPSC CAPF – 2012<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nThe Earth is not a perfect sphere but takes the shape of an oblate ellipsoid (or oblate spheroid), which means it is slightly flattened at the poles and bulges at the equator. This shape is a result of the Earth’s rotation. The centrifugal force generated by rotation is greatest at the equator because the linear velocity is highest there. This outward force counteracts gravity more effectively at the equator, causing the material there to bulge outwards, while the poles, experiencing minimal centrifugal force, are slightly flattened.
\n<\/section>\n
\nThe Earth’s oblate ellipsoid shape (bulging at the equator, flattened at the poles) is primarily caused by the centrifugal force resulting from its rotation.
\n<\/section>\n
\nThe difference between the equatorial diameter and the polar diameter is about 43 kilometers (approximately 12,756 km vs 12,714 km). This difference is relatively small compared to the overall size of the Earth, but it is significant enough for accurate measurements and understanding of Earth’s gravity field.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

Why does the Earth assume the shape of an oblate ellipsoid? [amp_mcq option1=”The Earth\u2019s rotation causes the Earth to bulge slightly at the equator and flatten at the poles” option2=”The Earth\u2019s rotation causes the Earth to bulge slightly at the poles and flatten at the equator” option3=”The Earth\u2019s revolution causes the Earth to bulge slightly … <\/p>\n

Detailed SolutionWhy does the Earth assume the shape of an oblate ellipsoid?<\/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":[1085],"tags":[1116,1150,1106],"class_list":["post-89525","post","type-post","status-publish","format-standard","hentry","category-upsc-capf","tag-1116","tag-the-earth","tag-world-and-physical-geography","no-featured-image-padding"],"yoast_head":"\nWhy does the Earth assume the shape of an oblate ellipsoid?<\/title>\n<meta name=\"description\" content=\"The Earth is not a perfect sphere but takes the shape of an oblate ellipsoid (or oblate spheroid), which means it is slightly flattened at the poles and bulges at the equator. This shape is a result of the Earth's rotation. The centrifugal force generated by rotation is greatest at the equator because the linear velocity is highest there. This outward force counteracts gravity more effectively at the equator, causing the material there to bulge outwards, while the poles, experiencing minimal centrifugal force, are slightly flattened. The Earth's oblate ellipsoid shape (bulging at the equator, flattened at the poles) is primarily caused by the centrifugal force resulting from its rotation.\" \/>\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\/why-does-the-earth-assume-the-shape-of-an-oblate-ellipsoid\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Why does the Earth assume the shape of an oblate ellipsoid?\" \/>\n<meta property=\"og:description\" content=\"The Earth is not a perfect sphere but takes the shape of an oblate ellipsoid (or oblate spheroid), which means it is slightly flattened at the poles and bulges at the equator. This shape is a result of the Earth's rotation. The centrifugal force generated by rotation is greatest at the equator because the linear velocity is highest there. This outward force counteracts gravity more effectively at the equator, causing the material there to bulge outwards, while the poles, experiencing minimal centrifugal force, are slightly flattened. The Earth's oblate ellipsoid shape (bulging at the equator, flattened at the poles) is primarily caused by the centrifugal force resulting from its rotation.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/why-does-the-earth-assume-the-shape-of-an-oblate-ellipsoid\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T10:06:21+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":"Why does the Earth assume the shape of an oblate ellipsoid?","description":"The Earth is not a perfect sphere but takes the shape of an oblate ellipsoid (or oblate spheroid), which means it is slightly flattened at the poles and bulges at the equator. This shape is a result of the Earth's rotation. The centrifugal force generated by rotation is greatest at the equator because the linear velocity is highest there. This outward force counteracts gravity more effectively at the equator, causing the material there to bulge outwards, while the poles, experiencing minimal centrifugal force, are slightly flattened. 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