{"id":11905,"date":"2026-10-25T16:56:34","date_gmt":"2026-10-25T16:56:34","guid":{"rendered":"https:\/\/skolski-puls.com.hr\/?p=11905"},"modified":"2026-10-25T16:56:34","modified_gmt":"2026-10-25T16:56:34","slug":"znanstveni-laboratorij-malih-istrazivaca","status":"publish","type":"post","link":"https:\/\/skolski-puls.com.hr\/?p=11905","title":{"rendered":"Znanstveni laboratorij Malih istra\u017eiva\u010da"},"content":{"rendered":"<p style=\"text-align: center;\">\u0160to skriva kraljica vo\u0107a?<\/p>\n<div>Povodom Svjetskog dana jabuka, polaznici izvannastavne aktivnosti <em>Mali istra\u017eiva\u010di<\/em> pretvorili su u\u010dionicu u\u00a0 mali laboratorij. Umjesto da jabuke odmah pojedu, u\u010denici su ih odlu\u010dili\u00a0 dobro istra\u017eiti i provjeriti tri znanstvene istine:<\/div>\n<ul>\n<li>Zna li jabuka plivati? Zna! Prvi pokus dokazao je da jabuka sadr\u017ei zrak. Budu\u0107i da \u010dak 25 % njezina volumena \u010dine skriveni zra\u010dni d\u017eepi\u0107i, njezina je gusto\u0107a manja od gusto\u0107e vode pa pluta poput pojasa za spa\u0161avanje.<\/li>\n<li>Mo\u017ee li se iz nje iscijediti rijeka? Skoro! Drugi pokus dokazao je da jabuka sadr\u017ei vodu. Sna\u017enim stiskanjem naribanih plodova kroz gazu, u\u010denici su iz stanica istisnuli pravo bogatstvo teku\u0107ine i potvrdili da se jabuka sastoji od \u010dak 85 % vode.<\/li>\n<li>Za\u0161to mijenja boju u sme\u0111u? Zato \u0161to oksidira. Tre\u0107i pokus pokazao je da prerezana jabuka u dodiru s kisikom pokre\u0107e kemijsku reakciju i stvara sme\u0111i &#8220;\u0161tit&#8221;. No, istra\u017eiva\u010di su otkrili i tajno oru\u017eje \u2013 limunov sok! Kiselina iz limuna djeluje kao antioksidans i uspje\u0161no blokira tamnjenje.<\/li>\n<\/ul>\n<div>Nakon \u0161to su sva opa\u017eanja nacrtali u svoje \u201eZnanstvene dnevnike\u201c, istra\u017eiva\u010dki timovi proglasili su pokuse uspje\u0161nima, a sat su zavr\u0161ili onim najzabavnijim dijelom \u2013 slatko-kiselom analizom okusa!<\/div>\n<div><\/div>\n<div><\/div>\n<div><\/div>\n<div>\n<div id='gallery-1' class='gallery galleryid-11905 gallery-columns-3 gallery-size-thumbnail'><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/skolski-puls.com.hr\/wp-content\/uploads\/2026\/10\/1000009256-1.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/skolski-puls.com.hr\/wp-content\/uploads\/2026\/10\/1000009256-1-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" \/><\/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:\/\/skolski-puls.com.hr\/wp-content\/uploads\/2026\/10\/1000009251-1.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/skolski-puls.com.hr\/wp-content\/uploads\/2026\/10\/1000009251-1-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" \/><\/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:\/\/skolski-puls.com.hr\/wp-content\/uploads\/2026\/10\/1000009234-1.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/skolski-puls.com.hr\/wp-content\/uploads\/2026\/10\/1000009234-1-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" \/><\/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:\/\/skolski-puls.com.hr\/wp-content\/uploads\/2026\/10\/1000009244-1.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/skolski-puls.com.hr\/wp-content\/uploads\/2026\/10\/1000009244-1-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" \/><\/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:\/\/skolski-puls.com.hr\/wp-content\/uploads\/2026\/10\/1000009226-Small.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/skolski-puls.com.hr\/wp-content\/uploads\/2026\/10\/1000009226-Small-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" \/><\/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:\/\/skolski-puls.com.hr\/wp-content\/uploads\/2026\/10\/1000009223.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/skolski-puls.com.hr\/wp-content\/uploads\/2026\/10\/1000009223-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" \/><\/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:\/\/skolski-puls.com.hr\/wp-content\/uploads\/2026\/10\/1000009215.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/skolski-puls.com.hr\/wp-content\/uploads\/2026\/10\/1000009215-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" \/><\/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:\/\/skolski-puls.com.hr\/wp-content\/uploads\/2026\/10\/1000009213.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/skolski-puls.com.hr\/wp-content\/uploads\/2026\/10\/1000009213-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" \/><\/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:\/\/skolski-puls.com.hr\/wp-content\/uploads\/2026\/10\/1000009226.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/skolski-puls.com.hr\/wp-content\/uploads\/2026\/10\/1000009226-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" \/><\/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:\/\/skolski-puls.com.hr\/wp-content\/uploads\/2026\/10\/1000009256.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/skolski-puls.com.hr\/wp-content\/uploads\/2026\/10\/1000009256-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" \/><\/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:\/\/skolski-puls.com.hr\/wp-content\/uploads\/2026\/10\/1000009251.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/skolski-puls.com.hr\/wp-content\/uploads\/2026\/10\/1000009251-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" \/><\/a>\n\t\t\t<\/div><\/figure>\n\t\t<\/div>\n\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u0160to skriva kraljica vo\u0107a? Povodom Svjetskog dana jabuka, polaznici izvannastavne aktivnosti Mali istra\u017eiva\u010di pretvorili su u\u010dionicu u\u00a0 mali laboratorij. Umjesto da jabuke odmah pojedu, u\u010denici su ih odlu\u010dili\u00a0 dobro istra\u017eiti i provjeriti tri znanstvene istine: Zna li jabuka plivati? Zna! Prvi pokus dokazao je da jabuka sadr\u017ei zrak. Budu\u0107i da \u010dak 25 % njezina volumena [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":11910,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14],"tags":[],"class_list":["post-11905","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-iz-skolskog-hodnika"],"_links":{"self":[{"href":"https:\/\/skolski-puls.com.hr\/index.php?rest_route=\/wp\/v2\/posts\/11905","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/skolski-puls.com.hr\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/skolski-puls.com.hr\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/skolski-puls.com.hr\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/skolski-puls.com.hr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=11905"}],"version-history":[{"count":1,"href":"https:\/\/skolski-puls.com.hr\/index.php?rest_route=\/wp\/v2\/posts\/11905\/revisions"}],"predecessor-version":[{"id":11919,"href":"https:\/\/skolski-puls.com.hr\/index.php?rest_route=\/wp\/v2\/posts\/11905\/revisions\/11919"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/skolski-puls.com.hr\/index.php?rest_route=\/wp\/v2\/media\/11910"}],"wp:attachment":[{"href":"https:\/\/skolski-puls.com.hr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=11905"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/skolski-puls.com.hr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=11905"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/skolski-puls.com.hr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=11905"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}