{"id":4640,"date":"2017-11-16T19:09:54","date_gmt":"2017-11-16T18:09:54","guid":{"rendered":"http:\/\/agora.xtec.cat\/ceip-santesteve\/?p=4640"},"modified":"2017-11-17T11:23:25","modified_gmt":"2017-11-17T10:23:25","slug":"experimentem-per-que-uns-objectes-suren-i-daltres-no","status":"publish","type":"post","link":"https:\/\/agora.xtec.cat\/iesantesteve\/bloc-1r-17-18\/experimentem-per-que-uns-objectes-suren-i-daltres-no\/","title":{"rendered":"Experimentem: per qu\u00e8 uns objectes suren i d’altres no?"},"content":{"rendered":"

Als submarins i submarinistes i als Exploradors marins ens va sorgir un dubte: per qu\u00e8 hi ha objectes que suren quan els posem a l’aigua i d’altres que no ho fan?<\/p>\n

Per resoldre els nostres dubtes hem decidit experimentar amb diferents objectes que tenim a la classe: clips, llapis, la tapa d’un tub de cola, una bola de plastilina i la mateixa bola de plastilina convertida en vaixell.<\/p>\n

Primer hem fet les nostres hip\u00f2tesis: suraran o no suraran? I despr\u00e9s, les hem comprovat. Per\u00f2 ens ha sorgit moltes preguntes i una contradicci\u00f3: Uns materials suren i altres no? Els objectes que pesen m\u00e9s s’enfonsen i els que pesen m\u00e9s suren? Per qu\u00e8 si les dues boles de plastilina eren de la mateixa mida, una ha surat i l’altra s’ha enfonsat? T\u00e9 a veure la forma dels objectes amb la flotaci\u00f3?<\/p>\n

Hem acabat veient que les coses\u00a0suren segons el material\u00a0amb qu\u00e8\u00a0estan fetes.\u00a0Per\u00f2, el clip \u00e9s de metall i s’enfonsa. Com \u00e9s que els vaixells s\u00f3n de metall i no s’enfonsen?<\/p>\n

Llavors hem fet un petit experiment. Hem posat a l’aigua un globus desinflat.\u00a0Sura, per\u00f2 si intentem enfonsar-lo, s’enfonsa. Despr\u00e9s l’hem inflat i ho hem tornat a provar. No hi ha manera d’enfonsar-lo!\u00a0Per qu\u00e8? Ahhh!!! Perqu\u00e8 a dintre t\u00e9 aire! I a m\u00e9s a m\u00e9s, hem descobert que l’aigua t\u00e9 una for\u00e7a que impedeix a alguns objectes enfonsar-se.<\/p>\n

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

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

Als submarins i submarinistes i als Exploradors marins ens va sorgir un dubte: per qu\u00e8 hi ha objectes que suren quan els posem a l’aigua i d’altres que no ho fan? Per resoldre els nostres dubtes hem decidit experimentar amb diferents objectes que tenim a la classe: clips, llapis, la tapa d’un tub de cola, […]<\/p>\n","protected":false},"author":71,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"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":[178],"tags":[],"class_list":["post-4640","post","type-post","status-publish","format-standard","hentry","category-bloc-1r-17-18"],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/agora.xtec.cat\/iesantesteve\/wp-json\/wp\/v2\/posts\/4640","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/agora.xtec.cat\/iesantesteve\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/agora.xtec.cat\/iesantesteve\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/iesantesteve\/wp-json\/wp\/v2\/users\/71"}],"replies":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/iesantesteve\/wp-json\/wp\/v2\/comments?post=4640"}],"version-history":[{"count":3,"href":"https:\/\/agora.xtec.cat\/iesantesteve\/wp-json\/wp\/v2\/posts\/4640\/revisions"}],"predecessor-version":[{"id":4661,"href":"https:\/\/agora.xtec.cat\/iesantesteve\/wp-json\/wp\/v2\/posts\/4640\/revisions\/4661"}],"wp:attachment":[{"href":"https:\/\/agora.xtec.cat\/iesantesteve\/wp-json\/wp\/v2\/media?parent=4640"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/agora.xtec.cat\/iesantesteve\/wp-json\/wp\/v2\/categories?post=4640"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/agora.xtec.cat\/iesantesteve\/wp-json\/wp\/v2\/tags?post=4640"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}