{"id":7313,"date":"1970-01-01T00:00:00","date_gmt":"1969-12-31T23:00:00","guid":{"rendered":"https:\/\/happylearning.tv\/atmosfera\/"},"modified":"2022-03-21T09:38:17","modified_gmt":"2022-03-21T08:38:17","slug":"atmosfera","status":"publish","type":"post","link":"https:\/\/happylearning.tv\/ca\/atmosfera\/","title":{"rendered":"L&#8217;atmosfera"},"content":{"rendered":"<div itemscope itemtype=\"http:\/\/schema.org\/VideoObject\"><meta itemprop=\"name\" content=\"El Sol\"><meta itemprop=\"thumbnailUrl\" content=\"https:\/\/vod-origin.globalmest.net\/EyDmR5\/Rqm1dR\/Rqm1dR-320.jpg\"><meta itemprop=\"contentUrl\" content=\"https:\/\/account.globalmest.com\/wQkdyd\/Q4Znwr.html\"><script type=\"application\/javascript\" src=\"https:\/\/account.globalmest.com\/wQkdyd\/Q4Znwr.js\"><\/script><\/div><p><strong>Compartir<\/strong> <\/p>\n<p style=\"text-align: left;\"><strong><\/strong><\/p>\n<p>Ingl\u00e9s<\/p>\n<h2><b>L&#8217;ATMOSFERA.<\/b><\/h2>\n<p>Hola amics, benvinguts a un nou v\u00eddeo de Happy Learning. Avui coneixerem l&#8217;atmosfera terrestre.<\/p>\n<p>La capa gasosa que envolta la Terra es diu atmosfera i \u00e9s fonamental perqu\u00e8 s\u2019hi desenvolupi la vida. Permet que tots els \u00e9ssers vius de la Terra puguem respirar, ens protegeix de les radiacions del sol i de l&#8217;espai, i impedeix que es produeixin grans difer\u00e8ncies de temperatura entre la nit i el dia.<br \/>\nL&#8217;atmosfera no \u00e9s una capa homog\u00e8nia sin\u00f3 que amb l&#8217;altura va canviant-ne la composici\u00f3, es va fent cada vegada menys densa, cada vegada t\u00e9 menys aire. Per aquestes difer\u00e8ncies la dividim en 5 capes anomenades troposfera, estratosfera, mesosfera, termosfera i exosfera.<br \/>\nAra les coneixerem totes!<\/p>\n<p>La troposfera \u00e9s la capa inferior, la m\u00e9s propera a la superf\u00edcie de la terra. Arriba fins als 12 quil\u00f2metres d&#8217;altura i \u00e9s on es donen els fen\u00f2mens del que anomenem el temps, \u00e9s a dir, el clima.<\/p>\n<p>L&#8217;estratosfera arriba de mitjana fins als 50 quil\u00f2metres d&#8217;altura, encara que en alguns punts arriba als 70. Dins de l&#8217;estratosfera hi ha la capa d&#8217;oz\u00f3 que \u00e9s fonamental per la vida perqu\u00e8 filtra els raigs ultraviolats procedents del sol. Si no exist\u00eds la capa d&#8217;oz\u00f3, aquests raigs acabarien amb la vida al nostre planeta.<\/p>\n<p>La mesosfera se situa entre els 50 i 80 quil\u00f2metres per sobre de la superf\u00edcie. \u00c9s la capa m\u00e9s freda de l&#8217;atmosfera, pot arribar fins als 90 graus sota zero. Quin fred, oi?!!!<\/p>\n<p>La termosfera, que tamb\u00e9 anomenem ionosfera, arriba fins als 400 quil\u00f2metres. Els transbordadors espacials giren al voltant de la terra a la termosfera, i tamb\u00e9 \u00e9s on es produeixen les misterioses aurores boreals. S\u00f3n precioses, oi que s\u00ed? !!!<\/p>\n<p>L&#8217;exosfera \u00e9s l&#8217;\u00faltima capa de l&#8217;atmosfera i \u00e9s entre els 400 i els 2 mil quil\u00f2metres d&#8217;altura. A partir d\u2019aqu\u00ed ja no hi ha cap gas, nom\u00e9s hi ha el buit, l&#8217;espai&#8230;<\/p>\n<p>Ara ja hem conegut l&#8217;atmosfera i les seves capes, per\u00f2 no podem acomiadar-nos sense parlar de la contaminaci\u00f3&#8230; (trist) L&#8217;activitat humana allibera molts gasos dolents a l&#8217;atmosfera. El fum de les f\u00e0briques&#8230; dels cotxes&#8230; moltes de les activitats que fem di\u00e0riament, estan provocant canvis en la composici\u00f3 de l&#8217;atmosfera. Tot aix\u00f2 produeix canvis en el clima, inundacions&#8230; la pluja \u00e0cida que acaba amb els boscos&#8230; Una atmosfera contaminada posa en perill la salut del nostre planeta, i de tots els \u00e9ssers vius. Hem de prendre les mesures necess\u00e0ries per contaminar tan poc com sigui possible i cuidar el nostre planeta i l&#8217;atmosfera per poder seguir gaudint de totes les meravelles de la natura.<\/p>\n<p>Ad\u00e9u amics i fins al pr\u00f2xim v\u00eddeo.<img decoding=\"async\" class=\"size-medium wp-image-4388 alignleft\" src=\"https:\/\/happylearning.tv\/wp-content\/uploads\/2018\/01\/cultura_h3-300x69.jpg\" alt=\"cultura_h3\" width=\"300\" height=\"69\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>La lluna \u00e9s l&#8217;\u00fanic sat\u00e8l\u00b7lit que gira al voltant del nostre planeta i triga 28 dies en donar una volta completa a la terra. El moviment de rotaci\u00f3 \u00e9s quan la lluna gira sobre si mateixa, i el moviment de translaci\u00f3, \u00e9s quan la lluna gira al voltant de la Terra.  Entra al m\u00f3n de coneixements i diversi\u00f3 de HappyLearningTv.<\/p>\n","protected":false},"author":2,"featured_media":4386,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1390],"tags":[1938,1942,1941],"class_list":["post-7313","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-lunivers-i-la-tierra-ca","tag-catalan-ca","tag-lunivers-i-la-tierra-ca","tag-tots-ca"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>L&#039;atmosfera video educatiu per a nens | Happy Learning<\/title>\n<meta name=\"description\" content=\"L&#039;atmosfera video educatiu per a nens | Happy Learning\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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