{"id":2996,"date":"2024-09-16T10:10:44","date_gmt":"2024-09-16T08:10:44","guid":{"rendered":"https:\/\/agora.xtec.cat\/escoladelpoblenoudeldelta\/?p=2996"},"modified":"2024-10-22T11:14:02","modified_gmt":"2024-10-22T09:14:02","slug":"taller-experimentacio-1-lacid-del-oceans","status":"publish","type":"post","link":"https:\/\/agora.xtec.cat\/escoladelpoblenoudeldelta\/portada\/taller-experimentacio-1-lacid-del-oceans\/","title":{"rendered":"Taller experimentaci\u00f3 1: L’\u00e0cid del oceans"},"content":{"rendered":"

L\u2019acidificaci\u00f3 de l\u2019oce\u00e0: Un experiment a l\u2019Escola del Poble Nou del Delta<\/strong><\/p>\n

L\u2019acidificaci\u00f3 de l\u2019oce\u00e0 \u00e9s un dels grans desafiaments ambientals que afronta el nostre planeta. Aquest fenomen es produeix quan els mars i oceans absorbeixen di\u00f2xid de carboni (CO\u2082) de l\u2019atmosfera. En lloc de quedar-se a l\u2019aire, part del CO\u2082 s\u2019incorpora a l\u2019aigua, on reacciona i provoca canvis en la seva qu\u00edmica, fent que l\u2019aigua es torni m\u00e9s \u00e0cida. Per\u00f2, com ens afecta aix\u00f2? I, sobretot, com afecta als organismes marins?<\/p>\n

A la nostra escola, hem volgut entendre millor aquest proc\u00e9s i veure-ho amb els nostres propis ulls. Hem realitzat un experiment senzill per\u00f2 molt revelador. Primer, vam bufar dins d\u2019un recipient amb aigua. Bufar? S\u00ed, vam simular el que fa el CO\u2082 en l\u2019atmosfera quan entra en contacte amb l\u2019aigua. Despr\u00e9s, amb l\u2019ajuda d\u2019un mesurador de pH, vam comprovar com el pH de l\u2019aigua es modificava, fent-se m\u00e9s \u00e0cid. Aquest canvi \u00e9s molt semblant al que passa als nostres oceans, nom\u00e9s que a escala global i a gran escala.<\/p>\n

Per tal d\u2019explorar encara m\u00e9s aquest fenomen, vam posar petxines dins de vinagre, que \u00e9s una subst\u00e0ncia molt \u00e0cida, i tamb\u00e9 unes altres en aigua normal. Sab\u00edeu que molts organismes marins com els corals, les petxines i els bivalves estan formats per carbonat c\u00e0lcic? Aquests organismes s\u00f3n especialment vulnerables a l\u2019acidificaci\u00f3. Com m\u00e9s \u00e0cida es torna l\u2019aigua, m\u00e9s dif\u00edcil els resulta mantenir les seves estructures. Aix\u00ed, les petxines que vam posar en vinagre van comen\u00e7ar a dissoldre\u2019s, mentre que les que estaven en aigua van quedar intactes.<\/p>\n

El nostre experiment reflecteix el que est\u00e0 passant als oceans de tot el m\u00f3n. Amb la crema de combustibles f\u00f2ssils com el carb\u00f3, el petroli i el gas, les emissions de CO\u2082 augmenten considerablement. Aix\u00f2 no nom\u00e9s contribueix al canvi clim\u00e0tic, sin\u00f3 que tamb\u00e9 afecta directament la salut dels nostres mars. Encara que l\u2019oce\u00e0 juga un paper important absorbint part d\u2019aquest CO\u2082 i ajudant a esmorteir l\u2019escalfament global, aix\u00f2 comporta un preu. Com m\u00e9s CO\u2082 absorbeix, m\u00e9s \u00e0cida es torna l\u2019aigua, i aix\u00f2 afecta negativament moltes esp\u00e8cies marines.<\/p>\n

La conclusi\u00f3 \u00e9s clara: hem de reduir les emissions de CO\u2082 si volem protegir els nostres oceans i la vida que hi habita. I com hem pogut veure amb aquest petit experiment a l\u2019escola, fins i tot accions senzilles poden ajudar-nos a entendre millor els problemes ambientals i motivar-nos a fer alguna cosa al respecte.<\/p>\n

Algunes fotos:<\/p>\n

\"\"<\/a>\"\"<\/a><\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

L\u2019acidificaci\u00f3 de l\u2019oce\u00e0: Un experiment a l\u2019Escola del Poble Nou del Delta L\u2019acidificaci\u00f3 de l\u2019oce\u00e0 \u00e9s un dels grans desafiaments ambientals que afronta el nostre planeta. Aquest fenomen es produeix quan els mars i oceans absorbeixen di\u00f2xid de carboni (CO\u2082) de l\u2019atmosfera. En lloc de quedar-se a l\u2019aire, part del CO\u2082 s\u2019incorpora a l\u2019aigua, on […]<\/p>\n","protected":false},"author":4,"featured_media":2999,"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 center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[164,4,5],"tags":[177],"class_list":["post-2996","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-experimentacio-tallers","category-portada","category-primaria","tag-experiments24-25"],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/agora.xtec.cat\/escoladelpoblenoudeldelta\/wp-json\/wp\/v2\/posts\/2996","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/agora.xtec.cat\/escoladelpoblenoudeldelta\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/agora.xtec.cat\/escoladelpoblenoudeldelta\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/escoladelpoblenoudeldelta\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/escoladelpoblenoudeldelta\/wp-json\/wp\/v2\/comments?post=2996"}],"version-history":[{"count":1,"href":"https:\/\/agora.xtec.cat\/escoladelpoblenoudeldelta\/wp-json\/wp\/v2\/posts\/2996\/revisions"}],"predecessor-version":[{"id":3000,"href":"https:\/\/agora.xtec.cat\/escoladelpoblenoudeldelta\/wp-json\/wp\/v2\/posts\/2996\/revisions\/3000"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/escoladelpoblenoudeldelta\/wp-json\/wp\/v2\/media\/2999"}],"wp:attachment":[{"href":"https:\/\/agora.xtec.cat\/escoladelpoblenoudeldelta\/wp-json\/wp\/v2\/media?parent=2996"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/agora.xtec.cat\/escoladelpoblenoudeldelta\/wp-json\/wp\/v2\/categories?post=2996"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/agora.xtec.cat\/escoladelpoblenoudeldelta\/wp-json\/wp\/v2\/tags?post=2996"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}