{"id":39020,"date":"2026-11-09T12:11:16","date_gmt":"2026-11-09T11:11:16","guid":{"rendered":"https:\/\/katolicka-gimnazija.hr\/?p=39020"},"modified":"2026-11-09T12:11:16","modified_gmt":"2026-11-09T11:11:16","slug":"sto-se-dogada-kada-cijeli-svijet-zatvorimo-u-bocu","status":"publish","type":"post","link":"https:\/\/katolicka-gimnazija.hr\/index.php\/2026\/11\/09\/sto-se-dogada-kada-cijeli-svijet-zatvorimo-u-bocu\/","title":{"rendered":"\u0160to se doga\u0111a kada cijeli svijet zatvorimo u bocu?"},"content":{"rendered":"<p>U\u010denici 1. a i 1. b razreda su 3. i 4. studenoga 2026. godine, u sklopu obrade nastavne teme <em>Organizacija i funkcioniranje ekosustava<\/em>, uz pomo\u0107 profesorice biologije i kemije Martine Franji\u0107 izradili svoj mali ekosustav \u2013 <strong>vrt u boci<\/strong><strong>.<\/strong><\/p>\n<p>Rije\u010d je o zanimljivom radu koji \u0107e u\u010denicima omogu\u0107iti pra\u0107enje promjena u jednom malom, zatvorenom ekosustavu tijekom sljede\u0107ih godina. U boce su zasadili nekoliko biljnih vrsta, me\u0111u kojima su <em>\u010duvarku\u0107a<\/em>, <em>mahovine<\/em> i <em>fitonije<\/em>, a posijali su i sjemenke graha i p\u0161enice. Nakon dodavanja vode boce su zatvorene \u010depom.<\/p>\n<p>U tlu koje se nalazi u boci, osim mineralnih tvari potrebnih biljkama, nalaze se i mikroorganizmi \u2013 bakterije i gljivice \u2013 koji imaju va\u017enu ulogu <strong>razlaga\u010da<\/strong>. Oni razgra\u0111uju ostatke uginulih organizama i tako omogu\u0107uju ponovno vra\u0107anje mineralnih tvari u tlo.<\/p>\n<p>Biljke iz tla uzimaju vodu i mineralne tvari, dok iz zraka kroz listove uzimaju ugljikov dioksid. Uz pomo\u0107 Sun\u010deve svjetlosti koja prodire kroz staklo boce, procesom <strong>fotosinteze<\/strong> stvaraju glukozu, pri \u010demu kao nusprodukt nastaje kisik.<\/p>\n<p><a href=\"https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.20-7.jpeg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-39023 alignright\" src=\"https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.20-7-300x225.jpeg\" alt=\"\" width=\"300\" height=\"225\" srcset=\"https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.20-7-300x225.jpeg 300w, https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.20-7-1024x768.jpeg 1024w, https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.20-7-768x576.jpeg 768w, https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.20-7-1536x1152.jpeg 1536w, https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.20-7-400x300.jpeg 400w, https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.20-7.jpeg 2000w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a>Istodobno, biljke <strong>di\u0161u<\/strong> tijekom cijeloga dana i no\u0107i. U stanicama se procesom stani\u010dnog disanja glukoza razgra\u0111uje uz kori\u0161tenje kisika, pri \u010demu nastaju ugljikov dioksid, voda i energija potrebna za \u017eivotne procese i rast biljke. Tako nastali ugljikov dioksid ponovno mo\u017ee biti iskori\u0161ten u fotosintezi.<\/p>\n<p>Voda se u zatvorenoj boci ne gubi iz sustava. Biljke je otpu\u0161taju u obliku vodene pare procesom <strong>transpiracije<\/strong>, a vodena para kondenzira na hladnijim stijenkama boce te se u obliku kapljica ponovno vra\u0107a u tlo. Na taj se na\u010din odvija svojevrsno malo kru\u017eenje vode unutar boce.<\/p>\n<p>Li\u0161\u0107e i ostaci uginulih biljaka koji padnu na dno boce razgra\u0111uju se djelovanjem bakterija i gljivica. Pri tome se mineralne tvari vra\u0107aju u tlo, a ugljikov dioksid ponovno ulazi u kru\u017eenje i mo\u017ee biti iskori\u0161ten u fotosintezi.<\/p>\n<p>Na taj na\u010din u boci se mogu pratiti brojni procesi karakteristi\u010dni za prirodne ekosustave \u2013 <strong>protok energije, kru\u017eenje vode i ugljika te kru\u017eenje mineralnih tvari<\/strong>, kao i me\u0111usobna povezanost proizvo\u0111a\u010da i razlaga\u010da.<\/p>\n<p>Ipak, vrt u boci nije potpuno neograni\u010den sustav. Koli\u010dina prostora, mineralnih tvari i drugih resursa je ograni\u010dena, pa \u0107e njegov razvoj ovisiti o ravnote\u017ei izme\u0111u razli\u010ditih organizama i uvjeta u boci.<\/p>\n<p>KG-ov mali vrt u boci tako postaje pravi <strong>\u017eivi laboratorij<\/strong> u kojem \u0107e u\u010denici mo\u0107i promatrati kako funkcionira ekosustav, pratiti promjene kroz vrijeme i povezivati znanje ste\u010deno na nastavi sa stvarnim \u017eivotnim primjerom.<\/p>\n<p>Tko zna \u2013 mo\u017eda \u0107emo za nekoliko godina otkriti kakvu nam je pri\u010du ispri\u010dao na\u0161 mali ekosustav zatvoren u boci.<\/p>\n<div id='gallery-1' class='gallery galleryid-39020 gallery-columns-3 gallery-size-medium'><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.20-7.jpeg'><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"225\" src=\"https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.20-7-300x225.jpeg\" class=\"attachment-medium size-medium\" alt=\"\" srcset=\"https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.20-7-300x225.jpeg 300w, https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.20-7-1024x768.jpeg 1024w, https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.20-7-768x576.jpeg 768w, https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.20-7-1536x1152.jpeg 1536w, https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.20-7-400x300.jpeg 400w, https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.20-7.jpeg 2000w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a>\n\t\t\t<\/div><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.21-4.jpeg'><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"225\" src=\"https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.21-4-300x225.jpeg\" class=\"attachment-medium size-medium\" alt=\"\" srcset=\"https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.21-4-300x225.jpeg 300w, https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.21-4-1024x768.jpeg 1024w, https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.21-4-768x576.jpeg 768w, https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.21-4-1536x1152.jpeg 1536w, https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.21-4-400x300.jpeg 400w, https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.21-4.jpeg 2000w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a>\n\t\t\t<\/div><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.22-2.jpeg'><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"225\" src=\"https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.22-2-300x225.jpeg\" class=\"attachment-medium size-medium\" alt=\"\" srcset=\"https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.22-2-300x225.jpeg 300w, https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.22-2-1024x768.jpeg 1024w, https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.22-2-768x576.jpeg 768w, https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.22-2-1536x1152.jpeg 1536w, https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.22-2-400x300.jpeg 400w, https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.22-2.jpeg 2000w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a>\n\t\t\t<\/div><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon portrait'>\n\t\t\t\t<a href='https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.21-2.jpeg'><img loading=\"lazy\" decoding=\"async\" width=\"225\" height=\"300\" src=\"https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.21-2-225x300.jpeg\" class=\"attachment-medium size-medium\" alt=\"\" srcset=\"https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.21-2-225x300.jpeg 225w, https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.21-2-768x1024.jpeg 768w, https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.21-2-1152x1536.jpeg 1152w, https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.21-2.jpeg 1500w\" sizes=\"auto, (max-width: 225px) 100vw, 225px\" \/><\/a>\n\t\t\t<\/div><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.21-1.jpeg'><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"225\" src=\"https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.21-1-300x225.jpeg\" class=\"attachment-medium size-medium\" alt=\"\" srcset=\"https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.21-1-300x225.jpeg 300w, https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.21-1-1024x768.jpeg 1024w, https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.21-1-768x576.jpeg 768w, https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.21-1-1536x1152.jpeg 1536w, https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.21-1-400x300.jpeg 400w, https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.21-1.jpeg 2000w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a>\n\t\t\t<\/div><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.20-1.jpeg'><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"225\" src=\"https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.20-1-300x225.jpeg\" class=\"attachment-medium size-medium\" alt=\"\" srcset=\"https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.20-1-300x225.jpeg 300w, https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.20-1-1024x768.jpeg 1024w, https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.20-1-768x576.jpeg 768w, https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.20-1-1536x1152.jpeg 1536w, https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.20-1-400x300.jpeg 400w, https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.20-1.jpeg 2000w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a>\n\t\t\t<\/div><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon portrait'>\n\t\t\t\t<a href='https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.21-9.jpeg'><img loading=\"lazy\" decoding=\"async\" width=\"225\" height=\"300\" src=\"https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.21-9-225x300.jpeg\" class=\"attachment-medium size-medium\" alt=\"\" srcset=\"https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.21-9-225x300.jpeg 225w, https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.21-9-768x1024.jpeg 768w, https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.21-9-1152x1536.jpeg 1152w, https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.21-9.jpeg 1500w\" sizes=\"auto, (max-width: 225px) 100vw, 225px\" \/><\/a>\n\t\t\t<\/div><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.20-3.jpeg'><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"225\" src=\"https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.20-3-300x225.jpeg\" class=\"attachment-medium size-medium\" alt=\"\" srcset=\"https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.20-3-300x225.jpeg 300w, https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.20-3-1024x768.jpeg 1024w, https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.20-3-768x576.jpeg 768w, https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.20-3-1536x1152.jpeg 1536w, https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.20-3-400x300.jpeg 400w, https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.20-3.jpeg 2000w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a>\n\t\t\t<\/div><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.21.jpeg'><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"225\" src=\"https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.21-300x225.jpeg\" class=\"attachment-medium size-medium\" alt=\"\" srcset=\"https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.21-300x225.jpeg 300w, https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.21-1024x768.jpeg 1024w, https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.21-768x576.jpeg 768w, https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.21-1536x1152.jpeg 1536w, https:\/\/katolicka-gimnazija.hr\/wp-content\/uploads\/2026\/11\/WhatsApp-Image-2026-11-07-at-09.25.21-400x300.jpeg 400w, 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