{"id":1135,"date":"2025-11-14T08:17:28","date_gmt":"2025-11-14T08:17:28","guid":{"rendered":"https:\/\/deliry.com\/svt\/?page_id=1135"},"modified":"2025-11-14T08:56:32","modified_gmt":"2025-11-14T08:56:32","slug":"sarah-et-noemie-tb","status":"publish","type":"page","link":"https:\/\/deliry.com\/svt\/sarah-et-noemie-tb\/","title":{"rendered":"Sarah et No\u00e9mie &#8211; TB"},"content":{"rendered":"\n<h1 class=\"wp-block-heading has-text-align-center\"><strong>\u00c9volution de l&rsquo;eau sur terre: atmosph\u00e8re primitive et atmosph\u00e8re actuelle <\/strong><\/h1>\n\n\n\n<p><\/p>\n\n\n\n<p class=\"has-text-align-center\"><strong>ILLUSTRATION METTANT EN OPPOSITION L\u2019ATMOSPH\u00c8RE PRIMITIVE A CELLE DE NOS JOURS <\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"318\" height=\"159\" src=\"https:\/\/deliry.com\/svt\/wp-content\/uploads\/2025\/11\/image-31.png\" alt=\"\" class=\"wp-image-1104\" style=\"width:612px;height:auto\" srcset=\"https:\/\/deliry.com\/svt\/wp-content\/uploads\/2025\/11\/image-31.png 318w, https:\/\/deliry.com\/svt\/wp-content\/uploads\/2025\/11\/image-31-300x150.png 300w\" sizes=\"auto, (max-width: 318px) 100vw, 318px\" \/><\/figure>\n\n\n\n<p><a href=\"https:\/\/deliry.com\/svt\/wp-content\/uploads\/2025\/11\/image-31.png\">https:\/\/deliry.com\/svt\/wp-content\/uploads\/2025\/11\/image-31.png<\/a><\/p>\n\n\n\n<p>Au premiers jours de la Terre, il y a environ 4,8 milliards d&rsquo;ann\u00e9es, l&rsquo;atmosph\u00e8re \u00e9tait bien diff\u00e9rente de celle que l&rsquo;on connait aujourd&rsquo;hui: c&rsquo;\u00e9tait l&rsquo;atmosph\u00e8re primitive.<\/p>\n\n\n\n<p>Celle-ci, \u00e9tait compos\u00e9 :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>d&rsquo;H2O ( sous forme de vapeurs) \u00e0 ~80%<\/li>\n\n\n\n<li>de CO2 \u00e0 15%<\/li>\n\n\n\n<li>de N2 \u00e0 5%<\/li>\n\n\n\n<li>d&rsquo;O2 \u00e0 0%<\/li>\n<\/ul>\n\n\n\n<p>De nos jours l&rsquo;atmosph\u00e8re actuelle est, elle, compos\u00e9 de:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>d&rsquo;H2O \u00e0 0% ( pr\u00e9sente uniquement sous forme de traces)<\/li>\n\n\n\n<li>de CO2 \u00e0 0,04%<\/li>\n\n\n\n<li>de N2 \u00e0 80%<\/li>\n\n\n\n<li>de O2 \u00e0 20%<\/li>\n<\/ul>\n\n\n\n<p>Ainsi, l&rsquo;on observe de nombreuses diff\u00e9rences de compositions; par exemple, le taux d&rsquo;eau (H2O) dans l&rsquo;atmosph\u00e8re entre l&rsquo;\u00e9poque primitive et nos jours \u00e0 drastiquement chut\u00e9 pour atteindre un tr\u00e8s faible niveau ( des traces d&rsquo;eau encore perceptibles dans l&rsquo;atmosph\u00e8re actuelle). Ce ph\u00e9nom\u00e8ne s&rsquo;explique par un changement de masse, d&rsquo;\u00e9tat de l&rsquo;eau sur notre plan\u00e8te, celle-ci passant de l&rsquo;\u00e9tat gazeux \u00e0 l&rsquo;\u00e9tat liquide. Cette forme liquide de l&rsquo;eau, nous la connaissons tous tr\u00e8s bien; cette eau \u00e0 aujourd&rsquo;hui en effet pris la forme de ce que nous connaissons comme les mers et oc\u00e9ans qui font la richesse biologique de la terre.<\/p>\n\n\n\n<p>Ce changement d&rsquo;\u00e9tat est dut directement au changement de temp\u00e9rature li\u00e9 \u00e0 l&rsquo;activit\u00e9 volcanique et \u00e0 son changement au fils du temps.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"940\" height=\"464\" src=\"https:\/\/deliry.com\/svt\/wp-content\/uploads\/2025\/11\/image-30.png\" alt=\"\" class=\"wp-image-1103\" srcset=\"https:\/\/deliry.com\/svt\/wp-content\/uploads\/2025\/11\/image-30.png 940w, https:\/\/deliry.com\/svt\/wp-content\/uploads\/2025\/11\/image-30-300x148.png 300w, https:\/\/deliry.com\/svt\/wp-content\/uploads\/2025\/11\/image-30-768x379.png 768w\" sizes=\"auto, (max-width: 940px) 100vw, 940px\" \/><\/figure>\n\n\n\n<p><a href=\"https:\/\/deliry.com\/svt\/wp-content\/uploads\/2025\/11\/image-30.png\">https:\/\/deliry.com\/svt\/wp-content\/uploads\/2025\/11\/image-30.png<\/a><\/p>\n\n\n\n<p>lien utilis\u00e9 lors de la cr\u00e9ation de ce cite:<\/p>\n\n\n\n<p><a href=\"https:\/\/www.kartable.fr\/ressources\/enseignement-scientifique\/cours\/latmosphere-terrestre-et-la-vie\/54767\">https:\/\/www.kartable.fr\/ressources\/enseignement-scientifique\/cours\/latmosphere-terrestre-et-la-vie\/54767<\/a><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u00c9volution de l&rsquo;eau sur terre: atmosph\u00e8re primitive et atmosph\u00e8re actuelle ILLUSTRATION METTANT EN OPPOSITION L\u2019ATMOSPH\u00c8RE PRIMITIVE A CELLE DE NOS JOURS https:\/\/deliry.com\/svt\/wp-content\/uploads\/2025\/11\/image-31.png Au premiers jours de la Terre, il y a environ 4,8 milliards d&rsquo;ann\u00e9es, l&rsquo;atmosph\u00e8re \u00e9tait bien diff\u00e9rente de celle que l&rsquo;on connait aujourd&rsquo;hui: c&rsquo;\u00e9tait l&rsquo;atmosph\u00e8re primitive. Celle-ci, \u00e9tait compos\u00e9 : De nos jours&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_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,"footnotes":""},"class_list":["post-1135","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/deliry.com\/svt\/wp-json\/wp\/v2\/pages\/1135","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/deliry.com\/svt\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/deliry.com\/svt\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/deliry.com\/svt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/deliry.com\/svt\/wp-json\/wp\/v2\/comments?post=1135"}],"version-history":[{"count":13,"href":"https:\/\/deliry.com\/svt\/wp-json\/wp\/v2\/pages\/1135\/revisions"}],"predecessor-version":[{"id":1228,"href":"https:\/\/deliry.com\/svt\/wp-json\/wp\/v2\/pages\/1135\/revisions\/1228"}],"wp:attachment":[{"href":"https:\/\/deliry.com\/svt\/wp-json\/wp\/v2\/media?parent=1135"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}