{"id":6713,"date":"2021-12-09T08:26:03","date_gmt":"2021-12-09T07:26:03","guid":{"rendered":"https:\/\/vrtec-litija.si\/medvedek\/?p=6713"},"modified":"2021-12-14T19:19:09","modified_gmt":"2021-12-14T18:19:09","slug":"barva-jesenskih-listov","status":"publish","type":"post","link":"https:\/\/vrtec-litija.si\/medvedek\/novice\/barva-jesenskih-listov\/","title":{"rendered":"Barva jesenskih listov"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"6713\" class=\"elementor elementor-6713\">\n\t\t\t\t\t\t<div class=\"elementor-inner\">\n\t\t\t\t<div class=\"elementor-section-wrap\">\n\t\t\t\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-6962b496 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"6962b496\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t\t\t<div class=\"elementor-row\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-6c291e3e\" data-id=\"6c291e3e\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-2b63c03 elementor-widget elementor-widget-text-editor\" data-id=\"2b63c03\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<!-- wp:paragraph -->\n<p>\u00bbZakaj listi padajo z dreves?\u00ab so se spra\u0161evali otroci, ko so opazovali poplesavanje listov v vetru. Pri ugotavljanju zakaj drevo odvr\u017ee liste so bili zelo domiselni. Povedali so:<\/p>\n<!-- \/wp:paragraph --><!-- wp:list -->\n<ul>\n<li>zato, da bo padal sneg,<\/li>\n<li>da bodo poleti novi zrasli,<\/li>\n<li>ker je mrzlo,<\/li>\n<li>zato, ker se zima bli\u017ea,<\/li>\n<li>zato, ker pada de\u017e.<\/li>\n<\/ul>\n<!-- \/wp:list --><!-- wp:paragraph -->\n<p>Vpra\u0161ali so star\u0161e in povedali:<\/p>\n<!-- \/wp:paragraph --><!-- wp:list -->\n<ul>\n<li>Drevesa liste odvr\u017eejo, da prihranijo energijo in se zavarujejo, da listi pozimi ne bi pomrznili in se polomili.<\/li>\n<li>Drevo odvr\u017ee svoje liste in voda ostane v koreninah, \u010de ne se naredi led in popokajo celice in drevo umre.<\/li>\n<\/ul>\n<!-- \/wp:list --><!-- wp:paragraph -->\n<p>\u0160e vedno pa nas je razjedalo vpra\u0161anje, ko smo opazovali jesenska drevesa v prelepih barvah. \u00bbZakaj\u00a0 v jeseni listi spremenijo barvo?\u00ab so se spra\u0161evali in opazovali jesenske liste, ki so padali z dreves.<\/p>\n<!-- \/wp:paragraph --><!-- wp:paragraph -->\n<p>Otroci so povedali, da zato, ker:<\/p>\n<!-- \/wp:paragraph --><!-- wp:list -->\n<ul>\n<li>sonce barva liste,<\/li>\n<li>sami se pobarvajo,<\/li>\n<li>je v oblakih de\u017e, pa de\u017e pada na liste in se pobarvajo,<\/li>\n<li>ker jih sonce posu\u0161i,<\/li>\n<li>ker so dolgo na drevesu in postanejo rumeni, \u2026.<\/li>\n<\/ul>\n<!-- \/wp:list --><!-- wp:paragraph -->\n<p>Ugotavljali so, kje bi to lahko izvedeli. Morda v kak\u0161ni knjigi, na internetu, ali pa bi koga vpra\u0161ali.<\/p>\n<!-- \/wp:paragraph --><!-- wp:paragraph -->\n<p>\u00bbJaz pa vem, da to vedo tisti, ki raziskujejo. Mislim, da se jim re\u010de znanstveniki,\u00ab je razmi\u0161ljal de\u010dek v skupini. Pa smo se lotili dela.\u00a0<\/p>\n<!-- \/wp:paragraph --><!-- wp:paragraph -->\n<p>V knjigi smo na\u0161li opis poskusa kromatografije, s katerim bi lahko ugotovili zakaj se to dogaja, pa nismo imeli vseh pripomo\u010dkov. Na pomo\u010d nam je prisko\u010dil doc. dr. Gregor Hostnik, ki je raziskovalec na Fakulteti za kemijo in kemijsko tehnologijo Univerze v Mariboru. Priskrbel nam je vse potrebno, da smo lahko izvedli poskus. Mi pa smo pripravili zelene in rumene liste in veliko radovednosti.<\/p>\n<!-- \/wp:paragraph --><!-- wp:paragraph -->\n<p>Pridno smo se lotili dela. Trgali smo liste, jih v terilniku stla\u010dili, namo\u010dili v acetonu, tako dobljeno raztopino nanesli na kromatografsko plo\u0161\u010dico in po kon\u010danem poskusu videli, katere barve so prisotne v listu. Otroci so bili vztrajni in potrpe\u017eljivi, tako kot je pri tak\u0161nih poskusih potrebno. Narisali so postopek poskusa. Kar nekaj \u010dasa smo \u010dakali na rezultate. Kon\u010dno smo izvedeli. V zelenih listih je \u0161e dovolj klorofila, saj ti zrastejo, ko je zunaj toplo in veliko svetlobe. V jesenskem \u010dasu je te \u010dedalje manj in klorofil neha nastajati, zato listi izgubijo zeleno barvo in jim ostane le \u0161e rumena.<\/p>\n<!-- \/wp:paragraph --><!-- wp:paragraph -->\n<p style=\"text-align: right;\">Za skupino Kobilice zapisala Slavi Hostnik, dipl. vzg.<\/p>\n<p><span style=\"text-decoration: underline;\"><a href=\"https:\/\/vrtec-litija.si\/medvedek\/gallery\/barve-jesenskega-listja\/\" target=\"_blank\" rel=\"noopener\">Fotografije<\/a><\/span><\/p>\n<!-- \/wp:paragraph -->\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"\u00bbZakaj listi padajo z dreves?\u00ab so se spra\u0161evali otroci, ko so opazovali poplesavanje listov v vetru. Pri ugotavljanju zakaj drevo odvr\u017ee liste so bili zelo domiselni. Povedali so: zato, da bo padal sneg, da bodo poleti novi zrasli, ker je mrzlo, zato, ker se zima bli\u017ea, zato, ker pada de\u017e. Vpra\u0161ali so star\u0161e in povedali: &#8230;","protected":false},"author":5,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[3],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Barva jesenskih listov - Enota Medvedek<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/vrtec-litija.si\/medvedek\/novice\/barva-jesenskih-listov\/\" \/>\n<meta property=\"og:locale\" content=\"sl_SI\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Barva jesenskih listov - Enota Medvedek\" \/>\n<meta property=\"og:description\" content=\"\u00bbZakaj listi padajo z dreves?\u00ab so se spra\u0161evali otroci, ko so opazovali poplesavanje listov v vetru. 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