{"id":782,"date":"2020-04-09T13:00:10","date_gmt":"2020-04-09T11:00:10","guid":{"rendered":"https:\/\/agora.xtec.cat\/escolaserradeprades\/?p=782"},"modified":"2020-04-09T13:48:54","modified_gmt":"2020-04-09T11:48:54","slug":"fem-un-experiment-setmana-1","status":"publish","type":"post","link":"https:\/\/agora.xtec.cat\/escolaserradeprades\/general\/fem-un-experiment-setmana-1\/","title":{"rendered":"FEM UN EXPERIMENT? SETMANA 1: LA PLUJA DE COLORS"},"content":{"rendered":"<p>Durant aquests dies de confinament us proposarem diversos experiments perqu\u00e8 pugueu investigar des de casa.<\/p>\n<p style=\"text-align: center;\"><strong>Aquesta setmana farem&#8230; LA PLUJA DE COLORS<\/strong><\/p>\n<p><iframe loading=\"lazy\" src=\"https:\/\/www.youtube.com\/embed\/XrdGAK07HPY\" width=\"560\" height=\"315\" frameborder=\"0\"><\/iframe><\/p>\n<h3>Qu\u00e8 necessitem?<\/h3>\n<p>200 mL d\u2019aigua<br \/>\n100 mL d\u2019oli<br \/>\n3 gotes de cada color (groc, blau, vermell i verd) de colorant alimentari<br \/>\n1 got (per barrejar l\u2019oli i colorants)<br \/>\n1 got transparent gran<br \/>\n1 cullera (per barrejar)<\/p>\n<h3>Com ho fem?<\/h3>\n<p>Afegim l\u2019aigua al got gran deixant espai per afegir despr\u00e9s l\u2019oli.<\/p>\n<p>Posem l\u2019oli en l\u2019altre got i afegim unes quantes gotes de colorants alimentaris de diversos colors i amb la cullera barregem fins aconseguir tenir moltes petites gotes de colors.<\/p>\n<p>Despr\u00e9s, lentament afegim la barreja d\u2019oli amb els colors en el got amb aigua i observem el que succeeix.<\/p>\n<h3>Qu\u00e8 passa?<\/h3>\n<p>Primer observem com l\u2019oli sura sobre l\u2019aigua. Aix\u00f2 passa perqu\u00e9 l\u2019oli i l\u2019aigua tenen una densitat diferent.<\/p>\n<p><img decoding=\"async\" class=\"wp-image-233\" src=\"https:\/\/www.repteexperimenta.cat\/wp-content\/uploads\/2020\/03\/idea.png\" alt=\"\" \/>La\u00a0<strong>densitat \u00e9s la relaci\u00f3 que hi ha entre la massa i el volum\u00a0<\/strong>que ocupa una subst\u00e0ncia. Quan es barregen diversos l\u00edquids, els que tenen\u00a0<strong>menor densitat tendeixen a posar-se sobre d\u2019un altre de major densitat<\/strong>.<\/p>\n<p>Per tant, en aquest experiment podem veure com\u00a0<strong>l\u2019oli \u00e9s menys dens que l\u2019aigua<\/strong>\u00a0i per tant es queda a dalt de l\u2019aigua.<\/p>\n<p>Per\u00f2 que passa amb el colorant? Com el colorant alimentari est\u00e0 preparat amb una base d\u2019aigua, aquest travessa l\u2019oli i va baixant a trav\u00e9s de l\u2019aigua donant la sensaci\u00f3 d\u2019una pluja de colors meravellosa.<\/p>\n<p><img decoding=\"async\" class=\"wp-image-236\" src=\"https:\/\/www.repteexperimenta.cat\/wp-content\/uploads\/2020\/03\/Sabies-que.png\" alt=\"\" \/><strong>Sabies que els materials porosos i menys densos que solen ser \u00fatils com a a\u00efllants de temperatura i so, t\u00edpicament suren a l\u2019aigua<\/strong>? Fixeu-vos que passa si poseu un tros de suro o pl\u00e0stic en un got d\u2019aigua!<\/p>\n<p>&nbsp;<\/p>\n<p>AQUEST \u00c9S UN EXPERIMENT INCL\u00d2S DINS DEL &#8220;<a href=\"https:\/\/www.repteexperimenta.cat\/\">REPTE EXPERIMENTA<\/a>&#8220;.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Durant aquests dies de confinament us proposarem diversos experiments perqu\u00e8 pugueu investigar des de casa. Aquesta setmana farem&#8230; LA PLUJA DE COLORS Qu\u00e8 necessitem? 200 mL d\u2019aigua 100 mL d\u2019oli 3 gotes de cada color (groc, blau, vermell i verd) de colorant alimentari 1 got (per barrejar l\u2019oli i colorants) 1 got transparent gran 1 [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":783,"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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