{"id":11505,"date":"2018-02-12T10:22:53","date_gmt":"2018-02-12T09:22:53","guid":{"rendered":"http:\/\/www.imelasavoie.fr\/?p=11505"},"modified":"2018-02-17T14:58:16","modified_gmt":"2018-02-17T13:58:16","slug":"atelier-sciences-pourquoi-y-a-t-il-eu-autant-de-verglas-dans-la-cour-de-lime","status":"publish","type":"post","link":"https:\/\/www.imelasavoie.fr\/?p=11505","title":{"rendered":"[Atelier sciences] Pourquoi y a-t-il eu autant de verglas dans la cour de l&rsquo;IME ?"},"content":{"rendered":"<h1 style=\"text-align: center;\">Pourquoi y a-t-il eu autant de verglas dans la cour de l&rsquo;IME ?<\/h1>\n<p>Pour r\u00e9pondre \u00e0 cette question, il faut conna\u00eetre les diff\u00e9rents \u00e9tats de l&rsquo;eau (H2O). Voici la repr\u00e9sentation mol\u00e9culaire de l&rsquo;eau:<\/p>\n<p><a href=\"https:\/\/www.imelasavoie.fr\/wp-content\/uploads\/2018\/02\/La_mol\u00e9cule_deau.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-medium wp-image-11509\" src=\"https:\/\/www.imelasavoie.fr\/wp-content\/uploads\/2018\/02\/La_mol\u00e9cule_deau-300x269.png\" alt=\"\" width=\"300\" height=\"269\" srcset=\"https:\/\/www.imelasavoie.fr\/wp-content\/uploads\/2018\/02\/La_mol\u00e9cule_deau-300x269.png 300w, https:\/\/www.imelasavoie.fr\/wp-content\/uploads\/2018\/02\/La_mol\u00e9cule_deau.png 313w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p>L&rsquo;eau existe sous diff\u00e9rents \u00e9tats: \u00e9tat solide, \u00e9tat liquide et \u00e9tat gazeux.<\/p>\n<p>&nbsp;<\/p>\n<p>On peut repr\u00e9senter ces diff\u00e9rents \u00e9tats sou la forme d&rsquo;un diagramme:<\/p>\n<p><a href=\"https:\/\/www.imelasavoie.fr\/wp-content\/uploads\/2018\/02\/Image_004.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-medium wp-image-11508\" src=\"https:\/\/www.imelasavoie.fr\/wp-content\/uploads\/2018\/02\/Image_004-300x151.png\" alt=\"\" width=\"300\" height=\"151\" srcset=\"https:\/\/www.imelasavoie.fr\/wp-content\/uploads\/2018\/02\/Image_004-300x151.png 300w, https:\/\/www.imelasavoie.fr\/wp-content\/uploads\/2018\/02\/Image_004.png 709w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p><iframe loading=\"lazy\" src=\"https:\/\/www.youtube.com\/embed\/GvX_9PCT8oM\" width=\"560\" height=\"315\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/p>\n<p>Le ph\u00e9nom\u00e8ne que nous avons observ\u00e9 avec le verglas partout dans la cour, c&rsquo;\u00e9tait un ph\u00e9nom\u00e8ne de \u00ab\u00a0pluie vergla\u00e7ante\u00a0\u00bb.<\/p>\n<p>Concr\u00e8tement, il pleut en dessous de\u00a00\u00b0C.\u00a0Ce n&rsquo;est pas normal. Normalement, il devrait neiger. Alors, d\u00e8s que l&rsquo;eau\u00a0touche le sol froid (en dessous de 0\u00b0C) alors cette eau liquide passe instantan\u00e9ment \u00e0 l&rsquo;\u00e9tat solide et forme de la glace ou du verglas.<\/p>\n<p><a href=\"https:\/\/www.imelasavoie.fr\/wp-content\/uploads\/2018\/02\/Figure-sb13-Courbe-de-cristallisation-presentant-une-surfusion-T-th-Temperature-de.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-medium wp-image-11507\" src=\"https:\/\/www.imelasavoie.fr\/wp-content\/uploads\/2018\/02\/Figure-sb13-Courbe-de-cristallisation-presentant-une-surfusion-T-th-Temperature-de-300x139.png\" alt=\"\" width=\"300\" height=\"139\" srcset=\"https:\/\/www.imelasavoie.fr\/wp-content\/uploads\/2018\/02\/Figure-sb13-Courbe-de-cristallisation-presentant-une-surfusion-T-th-Temperature-de-300x139.png 300w, https:\/\/www.imelasavoie.fr\/wp-content\/uploads\/2018\/02\/Figure-sb13-Courbe-de-cristallisation-presentant-une-surfusion-T-th-Temperature-de-768x355.png 768w, https:\/\/www.imelasavoie.fr\/wp-content\/uploads\/2018\/02\/Figure-sb13-Courbe-de-cristallisation-presentant-une-surfusion-T-th-Temperature-de.png 850w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p>Ce ph\u00e9nom\u00e8ne s&rsquo;appelle un ph\u00e9nom\u00e8ne de surfusion. Et on peut faire l&rsquo;exp\u00e9rience \u00e0 la maison !!! A la rentr\u00e9e, on teste en classe \ud83d\ude09<\/p>\n<p><iframe loading=\"lazy\" src=\"https:\/\/www.youtube.com\/embed\/umHvObBVHtE\" width=\"560\" height=\"315\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/p>\n<p><iframe loading=\"lazy\" src=\"https:\/\/www.youtube.com\/embed\/8ExRopuown0\" width=\"560\" height=\"315\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/p>\n<p>Nouvelle question: Comment le sel fait-il pour bloquer le ph\u00e9nom\u00e8ne de solidification de l&rsquo;eau ?<\/p>\n<p>C&rsquo;est ce que nous verrons prochainement \ud83d\ude09<\/p>\n<p style=\"text-align: center;\">Les classes Dinamo 1 et 2<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Pourquoi y a-t-il eu autant de verglas dans la cour de l&rsquo;IME ? Pour r\u00e9pondre \u00e0 cette question, il faut conna\u00eetre les diff\u00e9rents \u00e9tats de l&rsquo;eau (H2O). Voici la repr\u00e9sentation mol\u00e9culaire de l&rsquo;eau: L&rsquo;eau existe sous diff\u00e9rents \u00e9tats: \u00e9tat solide, &hellip; <a href=\"https:\/\/www.imelasavoie.fr\/?p=11505\">Continuer la lecture <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[48,59,61,56],"tags":[],"class_list":["post-11505","post","type-post","status-publish","format-standard","hentry","category-actualites","category-dinamo1","category-dinamo2","category-les-classes-et-ateliers"],"_links":{"self":[{"href":"https:\/\/www.imelasavoie.fr\/index.php?rest_route=\/wp\/v2\/posts\/11505","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.imelasavoie.fr\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.imelasavoie.fr\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.imelasavoie.fr\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.imelasavoie.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=11505"}],"version-history":[{"count":0,"href":"https:\/\/www.imelasavoie.fr\/index.php?rest_route=\/wp\/v2\/posts\/11505\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.imelasavoie.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=11505"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.imelasavoie.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=11505"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.imelasavoie.fr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=11505"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}