{"id":15433,"date":"2022-09-22T15:47:07","date_gmt":"2022-09-22T13:47:07","guid":{"rendered":"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/?p=15433"},"modified":"2022-09-22T15:47:41","modified_gmt":"2022-09-22T13:47:41","slug":"si-no-saps-sortir-no-entris","status":"publish","type":"post","link":"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/general\/si-no-saps-sortir-no-entris\/","title":{"rendered":"Si no saps sortir, no entris&#8230;"},"content":{"rendered":"<p>Dijous 22 de setembre l&#8217;alumnat de\u00a0 2n de batxillerat de l&#8217;optativa CTMA de l&#8217;<a href=\"https:\/\/institutjoanoro.cat\/\" target=\"_blank\" rel=\"noopener\">Institut Joan Or\u00f3<\/a>\u00a0 de\u00a0 Martorell\u00a0ha anat a explorar <a href=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/ambits\/geologia\/les-escletxes-i-els-riscs-geologics\/\">Les Escletxes<\/a> del Papiol acompanyats pel <a href=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/\">Camp d&#8217;aprenentatge de\u00a0 Can Santoi<\/a>.<\/p>\n<p>Per comen\u00e7ar ens hem situat geogr\u00e0ficament i hem interpretat el relleu de la zona, observant dos tipus de materials i tamb\u00e9 l&#8217;orientaci\u00f3 del vessant. Per esbrinar l&#8217;origen de les Escletxes hem plantejat l&#8217;activitat com a una recerca basada en evid\u00e8ncies. Han sorgit diferents hip\u00f2tesis: &#8220;les escletxes s&#8217;han originat a causa de fen\u00f2mens de meteoritzaci\u00f3&#8221;,\u00a0 &#8220;les escletxes s&#8217;han produ\u00eft per efecte de la tect\u00f2nica de plaques&#8221; i tamb\u00e9 &#8220;la gravetat ha participat en el seva formaci\u00f3&#8221;.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-15444 alignleft\" src=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2022\/09\/IMG_9235bis.jpg\" alt=\"\" width=\"199\" height=\"300\" \/>A partir d&#8217;aquestes hip\u00f2tesis han dedicat especial atenci\u00f3 a identificar les propietats dels materials sedimentaris inferiors, les argiles. Han comprovat la plasticitat en pres\u00e8ncia d&#8217;aigua. A continuaci\u00f3 han identificat els estrats superiors, formats per calc\u00e0ries fossil\u00edferes, que a escala micro s\u00f3n impermeables, per\u00f2 a escala meso i macro estan plens de forats i d&#8217;esquerdes verticals. Aquestes esquerdes s\u00ed que poden conduir les aig\u00fces pluvials cap als estrats inferiors argilosos.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignright size-medium wp-image-15445\" src=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2022\/09\/muntatge-2-300x300.jpg\" alt=\"\" width=\"300\" height=\"300\" srcset=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2022\/09\/muntatge-2.jpg 300w, https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2022\/09\/muntatge-2-150x150.jpg 150w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/>Despr\u00e9s d&#8217;una pausa per esmorzar s&#8217;han dedicat a obtenir mesures de 6 escletxes. Han esbrinat la direcci\u00f3, amplada, fond\u00e0ria, inclinacions de les parets i despla\u00e7aments verticals. Han obtingut que la majoria tenen una orientaci\u00f3 nord-sud, s&#8217;inclinen entre 80 i 90 graus i tenen obertures des de menys d&#8217;un metre a quasi 3 metres, amb fond\u00e0ries majorit\u00e0riament inferiors als 10 metres.<\/p>\n<p>Amb tot el que han vist, han reelaborat les\u00a0 hip\u00f2tesis inicials dels fen\u00f2mens erosius. La hist\u00f2ria m\u00e9s factible \u00e9s que els estrats calcaris, m\u00e9s r\u00edgids per\u00f2 amb fissures, han patit una meteoritzaci\u00f3 que ha perm\u00e8s a l&#8217;aigua de pluja fins arribar als estrats inferiors argilosos. Com que tot el conjunt es troba inclinat, el m\u00e9s probable \u00e9s que per gravetat els estrats calcaris s&#8217;hagin esquerdat i lliscat sobre les argiles, produint aquest conjunt de grans esquerdes conegudes com les Escletxes.<\/p>\n<p>En acabar i de cam\u00ed cap el nucli urb\u00e0 hem pogut veure algunes afectacions als edificis per lliscament del substrat argil\u00f3s i han fet una valoraci\u00f3 del risc que suposa per les persones.<\/p>\n<p>Han gaudit d&#8217;una experi\u00e8ncia nova\u00a0 i han posat en pr\u00e0ctica els seus aprenentatges fora de l&#8217;aula. A m\u00e9s han sigut uns investigadors molt intr\u00e8pids endinsant-se en escletxes molt angostes. Com ells mateixos ens han dit: &#8220;si no saps sortir, millor no entris&#8221;. Felicitats per la recerca que heu completat!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Dijous 22 de setembre l&#8217;alumnat de\u00a0 2n de batxillerat de l&#8217;optativa CTMA de l&#8217;Institut Joan Or\u00f3\u00a0 de\u00a0 Martorell\u00a0ha anat a explorar Les Escletxes del Papiol acompanyats pel Camp d&#8217;aprenentatge de\u00a0 Can Santoi. Per comen\u00e7ar ens hem situat geogr\u00e0ficament i hem interpretat el relleu de la zona, observant dos tipus de materials i tamb\u00e9 l&#8217;orientaci\u00f3 del [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":15441,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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