{"id":19328,"date":"2026-06-05T11:49:00","date_gmt":"2026-06-05T09:49:00","guid":{"rendered":"https:\/\/www.medskvz.org\/web\/?p=19328"},"modified":"2026-07-16T11:54:14","modified_gmt":"2026-07-16T09:54:14","slug":"znanost-kroz-sluzbene-podatke-ucenici-analizirali-kvalitetu-voda-na-temelju-izvjestaja-hzjz-a","status":"publish","type":"post","link":"https:\/\/www.medskvz.org\/web\/2026\/06\/znanost-kroz-sluzbene-podatke-ucenici-analizirali-kvalitetu-voda-na-temelju-izvjestaja-hzjz-a\/","title":{"rendered":"<strong>Znanost kroz slu\u017ebene podatke<br>&#8211; U\u010denici analizirali kvalitetu voda na temelju izvje\u0161taja HZJZ-a<\/strong>"},"content":{"rendered":"<p>U sklopu zavr\u0161ne istra\u017eiva\u010dke cjeline na\u0161eg \u0161kolskog projekta \u201eZdrav okoli\u0161 za zdrav \u017eivot!\u201d, u\u010denici su se posvetili analizi parametara koji utje\u010du na zdravlje i odr\u017eivost vodnih resursa u na\u0161em okru\u017eenju. Budu\u0107i da nam je prora\u010dun projekta odobren u djelomi\u010dnom iznosu, nismo bili u mogu\u0107nosti nabaviti planiranu elektroni\u010dku sondu za terenska mjerenja. U\u010denici su stoga pokazali vrhunsku znanstvenu snala\u017eljivost i primijenili metodu analize ustupljenih podataka iz 2024. godine.<\/p>\n<p>Ovaj rad predstavlja pravi <strong>interdisciplinarni izazov jer je, uz fiziku i ekologiju, u njega ugra\u0111eno i napredno znanje matematike i statistike<\/strong> koje se pokazalo klju\u010dnim alatom za dono\u0161enje to\u010dnih zaklju\u010daka. Pomo\u0107u funkcija u programu MS Excel i vizualizacije brkatih kutija u GeoGebri, u\u010denici su primijenili matemati\u010dke metode i detaljno usporedili klju\u010dne parametre: pH vrijednost, elektrovodljivost, koncentraciju kalijeva permanganata, amonija, nitrita i nitrata. Statisti\u010dka obrada podataka potvrdila je da bunarske vode imaju znatno ve\u0107i i nepravilniji raspon otopljenih soli i minerala u usporedbi s povr\u0161inskim vodama. Primjenom matemati\u010dkih formula, kod povr\u0161inskih voda izra\u010dunat je stabilan prosjek elektrovodljivosti od 599,53 uz malu standardnu devijaciju od 57,95, dok su bunarske vode pokazale znatno vi\u0161u aritmeti\u010dku sredinu od 732,69 i veliku standardnu devijaciju od \u010dak 181,58. Analiza je tako\u0111er otkrila da povr\u0161inske vode imaju blago lu\u017enatiji pH s medijanom od 7,9, dok su bunarske vode neutralnije s medijanom od 7,1, ali s izra\u017eenijim problemom povi\u0161ene koncentracije nitrata koja dosti\u017ee prosjek od 36,92 miligrama po litri. Najve\u0107u matemati\u010dku vrijednost donijelo je ispitivanje jakosti linearnih veza u GeoGebri. U\u010denici su otkrili da u bunarskim vodama postoji savr\u0161ena negativna korelacija izme\u0111u pH vrijednosti i elektrovodljivosti s koeficijentom korelacije od minus 1,00, dok povr\u0161inske vode imaju slabu korelaciju od svega minus 0,25.<\/p>\n<p>Rad sa stvarnim podacima omogu\u0107io je u\u010denicima da svoja znanja iz stru\u010dnih i prirodoslovnih predmeta izravno pove\u017eu s matemati\u010dkom statistikom te donesu pouzdane zaklju\u010dke o za\u0161titi na\u0161eg zdravlja.<\/p>\n<p>Profesorica matematike Mirela Brumec<\/p>\n\n\t\t<style type=\"text\/css\">\n\t\t\t#gallery-1 {\n\t\t\t\tmargin: auto;\n\t\t\t}\n\t\t\t#gallery-1 .gallery-item {\n\t\t\t\tfloat: left;\n\t\t\t\tmargin-top: 10px;\n\t\t\t\ttext-align: center;\n\t\t\t\twidth: 25%;\n\t\t\t}\n\t\t\t#gallery-1 img {\n\t\t\t\tborder: 2px solid #cfcfcf;\n\t\t\t}\n\t\t\t#gallery-1 .gallery-caption {\n\t\t\t\tmargin-left: 0;\n\t\t\t}\n\t\t\t\/* see gallery_shortcode() in wp-includes\/media.php *\/\n\t\t<\/style>\n\t\t<div id='gallery-1' class='gallery galleryid-19328 gallery-columns-4 gallery-size-large'><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/www.medskvz.org\/web\/wp-content\/uploads\/2026\/07\/et4.jpg'><img width=\"734\" height=\"362\" src=\"https:\/\/www.medskvz.org\/web\/wp-content\/uploads\/2026\/07\/et4.jpg\" class=\"attachment-large size-large colorbox-19328 \" alt=\"\" loading=\"lazy\" srcset=\"https:\/\/www.medskvz.org\/web\/wp-content\/uploads\/2026\/07\/et4.jpg 734w, https:\/\/www.medskvz.org\/web\/wp-content\/uploads\/2026\/07\/et4-300x148.jpg 300w\" sizes=\"(max-width: 734px) 100vw, 734px\" \/><\/a>\n\t\t\t<\/dt><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/www.medskvz.org\/web\/wp-content\/uploads\/2026\/07\/et3.jpg'><img width=\"734\" height=\"610\" src=\"https:\/\/www.medskvz.org\/web\/wp-content\/uploads\/2026\/07\/et3.jpg\" class=\"attachment-large size-large colorbox-19328 \" alt=\"\" loading=\"lazy\" srcset=\"https:\/\/www.medskvz.org\/web\/wp-content\/uploads\/2026\/07\/et3.jpg 734w, https:\/\/www.medskvz.org\/web\/wp-content\/uploads\/2026\/07\/et3-300x249.jpg 300w\" sizes=\"(max-width: 734px) 100vw, 734px\" \/><\/a>\n\t\t\t<\/dt><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/www.medskvz.org\/web\/wp-content\/uploads\/2026\/07\/et2.jpg'><img width=\"748\" height=\"697\" src=\"https:\/\/www.medskvz.org\/web\/wp-content\/uploads\/2026\/07\/et2.jpg\" class=\"attachment-large size-large colorbox-19328 \" alt=\"\" loading=\"lazy\" srcset=\"https:\/\/www.medskvz.org\/web\/wp-content\/uploads\/2026\/07\/et2.jpg 748w, https:\/\/www.medskvz.org\/web\/wp-content\/uploads\/2026\/07\/et2-300x280.jpg 300w\" sizes=\"(max-width: 748px) 100vw, 748px\" \/><\/a>\n\t\t\t<\/dt><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/www.medskvz.org\/web\/wp-content\/uploads\/2026\/07\/et1.jpg'><img width=\"802\" height=\"389\" src=\"https:\/\/www.medskvz.org\/web\/wp-content\/uploads\/2026\/07\/et1.jpg\" class=\"attachment-large size-large colorbox-19328 \" alt=\"\" loading=\"lazy\" srcset=\"https:\/\/www.medskvz.org\/web\/wp-content\/uploads\/2026\/07\/et1.jpg 802w, https:\/\/www.medskvz.org\/web\/wp-content\/uploads\/2026\/07\/et1-300x146.jpg 300w, https:\/\/www.medskvz.org\/web\/wp-content\/uploads\/2026\/07\/et1-768x373.jpg 768w\" sizes=\"(max-width: 802px) 100vw, 802px\" \/><\/a>\n\t\t\t<\/dt><\/dl><br style=\"clear: both\" \/>\n\t\t<\/div>\n\n","protected":false},"excerpt":{"rendered":"<div class=\"slide-text-bg2\"><span>U sklopu zavr\u0161ne istra\u017eiva\u010dke cjeline na\u0161eg \u0161kolskog projekta \u201eZdrav okoli\u0161 za zdrav \u017eivot!\u201d, u\u010denici su se posvetili analizi parametara koji u<\/span><\/div>\n<div class=\"slide-btn-area-sm\"><a href=\"https:\/\/www.medskvz.org\/web\/2026\/06\/znanost-kroz-sluzbene-podatke-ucenici-analizirali-kvalitetu-voda-na-temelju-izvjestaja-hzjz-a\/\" class=\"slide-btn-sm\">Pro\u010ditaj vi\u0161e<\/a><\/div>\n","protected":false},"author":11,"featured_media":19272,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/www.medskvz.org\/web\/wp-json\/wp\/v2\/posts\/19328"}],"collection":[{"href":"https:\/\/www.medskvz.org\/web\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.medskvz.org\/web\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.medskvz.org\/web\/wp-json\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"https:\/\/www.medskvz.org\/web\/wp-json\/wp\/v2\/comments?post=19328"}],"version-history":[{"count":1,"href":"https:\/\/www.medskvz.org\/web\/wp-json\/wp\/v2\/posts\/19328\/revisions"}],"predecessor-version":[{"id":19341,"href":"https:\/\/www.medskvz.org\/web\/wp-json\/wp\/v2\/posts\/19328\/revisions\/19341"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.medskvz.org\/web\/wp-json\/wp\/v2\/media\/19272"}],"wp:attachment":[{"href":"https:\/\/www.medskvz.org\/web\/wp-json\/wp\/v2\/media?parent=19328"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.medskvz.org\/web\/wp-json\/wp\/v2\/categories?post=19328"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.medskvz.org\/web\/wp-json\/wp\/v2\/tags?post=19328"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}