{"id":1016,"date":"2023-06-19T13:09:45","date_gmt":"2023-06-19T07:39:45","guid":{"rendered":"https:\/\/lotusarise.com\/qna\/?p=1016"},"modified":"2024-04-03T07:13:12","modified_gmt":"2024-04-03T01:43:12","slug":"q-consider-the-following-statements-36","status":"publish","type":"post","link":"https:\/\/lotusarise.com\/qna\/upsc\/q-consider-the-following-statements-36","title":{"rendered":"Q. Consider the following statements:"},"content":{"rendered":"\n<ol class=\"wp-block-list\" type=\"1\">\n<li>The Earth\u2019s magnetic field has reversed every few hundred thousand years.<\/li>\n\n\n\n<li>When the Earth was created more than 4000 million years ago, there was 54% oxygen and&nbsp;<strong>no carbon dioxide.<\/strong><\/li>\n\n\n\n<li>When living organisms orginated, they modified the early atmosphere of the Earth.<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">Which of the statements given above is\/are correct?<\/p>\n\n\n\n<ul class=\"mcq wp-block-list\">\n<li>1 only<\/li>\n\n\n\n<li>2 and 3 only<\/li>\n\n\n\n<li>1 and 3 only<\/li>\n\n\n\n<li>1, 2 and 3<\/li>\n<\/ul>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><strong>Answer: (c) 1 and 3 only<\/strong><\/p>\n<\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\">Notes:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Scientists estimate&nbsp;<strong>reversals have happened&nbsp;at least hundreds of times&nbsp;over&nbsp;the&nbsp;past&nbsp;three billion&nbsp;years.<\/strong><\/li>\n\n\n\n<li>Over the last 20 million years,&nbsp;<strong>magnetic north and south have flipped<\/strong>&nbsp;roughly every 200,000 to 300,000 years.<\/li>\n\n\n\n<li>The last of these major reversals occurred about 780,000 years ago.<\/li>\n\n\n\n<li>Between&nbsp;4.5 and 2.5 billion years (the Archaean and Proterozoic time), the&nbsp;earliest&nbsp;secondary&nbsp;atmosphere contained carbon dioxide&nbsp;(CO2),&nbsp;methane&nbsp;(CH4),&nbsp;water vapor&nbsp;(H2O),&nbsp;carbon monoxide&nbsp;(CO), a&nbsp;little nitrogen&nbsp;(N), and&nbsp;hydrogen&nbsp;(H). So Carbon dioxide is present.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Also Read:&nbsp;<a href=\"https:\/\/lotusarise.com\/origin-of-atmosphere-upsc\/\">Origin of Atmosphere<\/a><\/strong><\/p>\n\n\n<style>.wp-block-kadence-spacer.kt-block-spacer-_52ca62-c4 .kt-block-spacer{height:40px;}.wp-block-kadence-spacer.kt-block-spacer-_52ca62-c4 .kt-divider{border-top-width:2px;border-top-color:#eee;width:100%;border-top-style:solid;}<\/style>\n<div class=\"wp-block-kadence-spacer aligncenter kt-block-spacer-_52ca62-c4\"><div class=\"kt-block-spacer kt-block-spacer-halign-center\"><hr class=\"kt-divider\"\/><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Which of the statements given above is\/are correct? Answer: (c) 1 and 3 only Notes: Also Read:&nbsp;Origin of Atmosphere<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","footnotes":""},"categories":[1,3],"tags":[37],"years":[55],"class_list":["post-1016","post","type-post","status-publish","format-standard","hentry","category-upsc","category-prelims","tag-geography","years-55"],"acf":[],"taxonomy_info":{"category":[{"value":1,"label":"UPSC"},{"value":3,"label":"Prelims"}],"post_tag":[{"value":37,"label":"Geography"}],"years":[{"value":55,"label":"2018"}]},"featured_image_src_large":false,"author_info":{"display_name":"LotusArise","author_link":"https:\/\/lotusarise.com\/qna\/author\/team-lotusarise"},"comment_info":0,"category_info":[{"term_id":1,"name":"UPSC","slug":"upsc","term_group":0,"term_taxonomy_id":1,"taxonomy":"category","description":"","parent":0,"count":1269,"filter":"raw","cat_ID":1,"category_count":1269,"category_description":"","cat_name":"UPSC","category_nicename":"upsc","category_parent":0},{"term_id":3,"name":"Prelims","slug":"prelims","term_group":0,"term_taxonomy_id":3,"taxonomy":"category","description":"","parent":1,"count":1251,"filter":"raw","cat_ID":3,"category_count":1251,"category_description":"","cat_name":"Prelims","category_nicename":"prelims","category_parent":1}],"tag_info":[{"term_id":37,"name":"Geography","slug":"geography","term_group":0,"term_taxonomy_id":37,"taxonomy":"post_tag","description":"","parent":0,"count":167,"filter":"raw"}],"_links":{"self":[{"href":"https:\/\/lotusarise.com\/qna\/wp-json\/wp\/v2\/posts\/1016","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lotusarise.com\/qna\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lotusarise.com\/qna\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lotusarise.com\/qna\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/lotusarise.com\/qna\/wp-json\/wp\/v2\/comments?post=1016"}],"version-history":[{"count":0,"href":"https:\/\/lotusarise.com\/qna\/wp-json\/wp\/v2\/posts\/1016\/revisions"}],"wp:attachment":[{"href":"https:\/\/lotusarise.com\/qna\/wp-json\/wp\/v2\/media?parent=1016"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lotusarise.com\/qna\/wp-json\/wp\/v2\/categories?post=1016"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lotusarise.com\/qna\/wp-json\/wp\/v2\/tags?post=1016"},{"taxonomy":"years","embeddable":true,"href":"https:\/\/lotusarise.com\/qna\/wp-json\/wp\/v2\/years?post=1016"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}