{"id":9397,"date":"2023-12-22T14:32:52","date_gmt":"2023-12-22T13:32:52","guid":{"rendered":"https:\/\/sitesecoles43.ac-clermont.fr\/0430615k\/?p=9397"},"modified":"2023-12-22T14:38:09","modified_gmt":"2023-12-22T13:38:09","slug":"leau-a-letat-liquide-prend-t-elle-moins-ou-plus-de-place-que-leau-a-letat-solide","status":"publish","type":"post","link":"https:\/\/sitesecoles43.ac-clermont.fr\/0430615k\/2023\/12\/22\/leau-a-letat-liquide-prend-t-elle-moins-ou-plus-de-place-que-leau-a-letat-solide\/","title":{"rendered":"L\u2019eau \u00e0 l\u2019\u00e9tat LIQUIDE prend-t-elle moins ou plus de place que l\u2019eau \u00e0 l\u2019\u00e9tat SOLIDE ?"},"content":{"rendered":"\n<p>La classe de CE2 a d\u00e9cid\u00e9 de r\u00e9pondre \u00e0 cette question en se servant de la d\u00e9marche exp\u00e9rimentale comme les grands scientifiques.<\/p>\n\n\n\n<p><strong><em>Exp\u00e9rience<\/em><\/strong><br>On a mis de la neige dans une \u00e9prouvette et on a not\u00e9 le niveau (ras bord). On a attendu que la neige fonde&#8230;<\/p>\n\n\n\n<figure class=\"wp-block-gallery columns-2 is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\"><ul class=\"blocks-gallery-grid\"><li class=\"blocks-gallery-item\"><figure><img loading=\"lazy\" decoding=\"async\" width=\"488\" height=\"650\" src=\"https:\/\/sitesecoles43.ac-clermont.fr\/0430615k\/wp-content\/uploads\/sites\/16\/2023\/12\/bleu.jpg\" alt=\"\" data-id=\"9398\" data-full-url=\"https:\/\/sitesecoles43.ac-clermont.fr\/0430615k\/wp-content\/uploads\/sites\/16\/2023\/12\/bleu.jpg\" data-link=\"https:\/\/sitesecoles43.ac-clermont.fr\/0430615k\/?attachment_id=9398\" class=\"wp-image-9398\" srcset=\"https:\/\/sitesecoles43.ac-clermont.fr\/0430615k\/wp-content\/uploads\/sites\/16\/2023\/12\/bleu.jpg 488w, https:\/\/sitesecoles43.ac-clermont.fr\/0430615k\/wp-content\/uploads\/sites\/16\/2023\/12\/bleu-225x300.jpg 225w\" sizes=\"auto, (max-width: 488px) 85vw, 488px\" \/><\/figure><\/li><li class=\"blocks-gallery-item\"><figure><img loading=\"lazy\" decoding=\"async\" width=\"470\" height=\"627\" src=\"https:\/\/sitesecoles43.ac-clermont.fr\/0430615k\/wp-content\/uploads\/sites\/16\/2023\/12\/fiole.jpg\" alt=\"\" data-id=\"9399\" data-full-url=\"https:\/\/sitesecoles43.ac-clermont.fr\/0430615k\/wp-content\/uploads\/sites\/16\/2023\/12\/fiole.jpg\" data-link=\"https:\/\/sitesecoles43.ac-clermont.fr\/0430615k\/?attachment_id=9399\" class=\"wp-image-9399\" srcset=\"https:\/\/sitesecoles43.ac-clermont.fr\/0430615k\/wp-content\/uploads\/sites\/16\/2023\/12\/fiole.jpg 470w, https:\/\/sitesecoles43.ac-clermont.fr\/0430615k\/wp-content\/uploads\/sites\/16\/2023\/12\/fiole-225x300.jpg 225w\" sizes=\"auto, (max-width: 470px) 85vw, 470px\" \/><\/figure><\/li><\/ul><\/figure>\n\n\n\n<p><strong><em>Observation<\/em><\/strong><br>L\u2019eau a pris <em><u>moins<\/u><\/em> de place que la neige\u00a0!<br><strong><em>Pourquoi\u00a0? Hypoth\u00e8ses\u2026.<\/em><\/strong><br>L\u2019eau s\u2019est-elle \u00e9vapor\u00e9e\u00a0? Non, car il ne fait pas assez chaud dans la classe.<br>Donc, c\u2019est autre chose\u2026..<\/p>\n\n\n\n<p><strong><em>Une histoire de place\u00a0?<\/em><\/strong><br>La mol\u00e9cule d\u2019eau ne se place pas de la m\u00eame fa\u00e7on quand l\u2019eau est \u00e0 l\u2019\u00e9tat liquide ou solide.<\/p>\n\n\n\n<div class=\"wp-block-image is-style-default\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"713\" height=\"621\" src=\"https:\/\/sitesecoles43.ac-clermont.fr\/0430615k\/wp-content\/uploads\/sites\/16\/2023\/12\/lego.jpg\" alt=\"\" class=\"wp-image-9400\" srcset=\"https:\/\/sitesecoles43.ac-clermont.fr\/0430615k\/wp-content\/uploads\/sites\/16\/2023\/12\/lego.jpg 713w, https:\/\/sitesecoles43.ac-clermont.fr\/0430615k\/wp-content\/uploads\/sites\/16\/2023\/12\/lego-300x261.jpg 300w\" sizes=\"auto, (max-width: 709px) 85vw, (max-width: 909px) 67vw, (max-width: 984px) 61vw, (max-width: 1362px) 45vw, 600px\" \/><\/figure><\/div>\n\n\n\n<p class=\"has-text-align-center\">16 mol\u00e9cules H2O dans chaque r\u00e9cipient \u00e9tat liquide puis solide.<br>Pour un m\u00eame nombre de mol\u00e9cules d\u2019eau ( H20) suivant les liaisons entre les atomes, l\u2019eau \u00e0 l\u2019\u00e9tat solide sort du r\u00e9cipient ( ou le casse )&nbsp;!<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-style-rounded\"><img loading=\"lazy\" decoding=\"async\" width=\"548\" height=\"279\" src=\"https:\/\/sitesecoles43.ac-clermont.fr\/0430615k\/wp-content\/uploads\/sites\/16\/2023\/12\/mol.jpg\" alt=\"\" class=\"wp-image-9401\" srcset=\"https:\/\/sitesecoles43.ac-clermont.fr\/0430615k\/wp-content\/uploads\/sites\/16\/2023\/12\/mol.jpg 548w, https:\/\/sitesecoles43.ac-clermont.fr\/0430615k\/wp-content\/uploads\/sites\/16\/2023\/12\/mol-300x153.jpg 300w\" sizes=\"auto, (max-width: 548px) 85vw, 548px\" \/><\/figure>\n\n\n\n<p>Dans la glace,&nbsp;les mol\u00e9cules d&rsquo;eau retenues par des liaisons hydrog\u00e8ne s&rsquo;agencent selon un r\u00e9seau d&rsquo;hexagones qui laisse beaucoup de vide&nbsp;: la glace prend donc plus de place que le liquide. Les liaisons hydrog\u00e8ne se retrouvent aussi dans l&rsquo;eau liquide mais de fa\u00e7on moins stable.<\/p>\n\n\n\n<p><strong><em>V\u00e9rification de notre hypoth\u00e8se&nbsp;<\/em><\/strong><br>Je remplis \u00e0 ras bord une bouteille d\u2019eau, on la rebouche et on la met \u00e0 l\u2019ext\u00e9rieur un jour de grand gel.<br>Si notre hypoth\u00e8se est v\u00e9rifi\u00e9e ALORS la bouteille devrait exploser&nbsp;car l\u2019eau \u00e0 l\u2019\u00e9tat SOLIDE prend plus de place que l\u2019eau \u00e0 l\u2019\u00e9tat LIQUIDE !<\/p>\n","protected":false},"excerpt":{"rendered":"<p>La classe de CE2 a d\u00e9cid\u00e9 de r\u00e9pondre \u00e0 cette question en se servant de la d\u00e9marche exp\u00e9rimentale comme les grands scientifiques. Exp\u00e9rienceOn a mis de la neige dans une \u00e9prouvette et on a not\u00e9 le niveau (ras bord). On a attendu que la neige fonde&#8230; ObservationL\u2019eau a pris moins de place que la neige\u00a0!Pourquoi\u00a0? &hellip; <a href=\"https:\/\/sitesecoles43.ac-clermont.fr\/0430615k\/2023\/12\/22\/leau-a-letat-liquide-prend-t-elle-moins-ou-plus-de-place-que-leau-a-letat-solide\/\" class=\"more-link\">Continuer la lecture<span class=\"screen-reader-text\"> de &laquo;&nbsp;L\u2019eau \u00e0 l\u2019\u00e9tat LIQUIDE prend-t-elle moins ou plus de place que l\u2019eau \u00e0 l\u2019\u00e9tat SOLIDE ?&nbsp;&raquo;<\/span><\/a><\/p>\n","protected":false},"author":32,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-9397","post","type-post","status-publish","format-standard","hentry","category-non-classe"],"_links":{"self":[{"href":"https:\/\/sitesecoles43.ac-clermont.fr\/0430615k\/wp-json\/wp\/v2\/posts\/9397","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sitesecoles43.ac-clermont.fr\/0430615k\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sitesecoles43.ac-clermont.fr\/0430615k\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sitesecoles43.ac-clermont.fr\/0430615k\/wp-json\/wp\/v2\/users\/32"}],"replies":[{"embeddable":true,"href":"https:\/\/sitesecoles43.ac-clermont.fr\/0430615k\/wp-json\/wp\/v2\/comments?post=9397"}],"version-history":[{"count":2,"href":"https:\/\/sitesecoles43.ac-clermont.fr\/0430615k\/wp-json\/wp\/v2\/posts\/9397\/revisions"}],"predecessor-version":[{"id":9406,"href":"https:\/\/sitesecoles43.ac-clermont.fr\/0430615k\/wp-json\/wp\/v2\/posts\/9397\/revisions\/9406"}],"wp:attachment":[{"href":"https:\/\/sitesecoles43.ac-clermont.fr\/0430615k\/wp-json\/wp\/v2\/media?parent=9397"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sitesecoles43.ac-clermont.fr\/0430615k\/wp-json\/wp\/v2\/categories?post=9397"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sitesecoles43.ac-clermont.fr\/0430615k\/wp-json\/wp\/v2\/tags?post=9397"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}