{"id":211,"date":"2021-04-16T08:59:20","date_gmt":"2021-04-16T06:59:20","guid":{"rendered":"https:\/\/kids.esa.int\/lessons_the_water_cycle\/"},"modified":"2026-10-08T00:25:31","modified_gmt":"2026-10-07T22:25:31","slug":"lessons_the_water_cycle","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/fi\/lessons_the_water_cycle\/","title":{"rendered":"Vesikierto"},"content":{"rendered":"<div class=\"lede\">\n<p>Tiesitk\u00f6, ett\u00e4 maapallo on kierr\u00e4tt\u00e4nyt vett\u00e4 jo yli 4 miljardia vuotta? Jokainen maapallon el\u00e4v\u00e4 olento tarvitsee vett\u00e4 selviyty\u00e4kseen, ja vesi, jota juomme t\u00e4n\u00e4\u00e4n, on samaa vett\u00e4, jota villamammutit, dinosaurukset ja ensimm\u00e4iset ihmiset ikin\u00e4 joivat! Maapallolla on vain tietty m\u00e4\u00e4r\u00e4 vett\u00e4, ja se kiert\u00e4\u00e4 j\u00e4rvien, jokien, merien, ilmakeh\u00e4n ja maaper\u00e4n v\u00e4lill\u00e4. T\u00e4t\u00e4 kutsutaan veden kiertokulkuksi, ja se on luonnon tapa kierr\u00e4tt\u00e4\u00e4 vett\u00e4.<\/p>\n<\/div>\n<p>Vesikierrossa on nelj\u00e4 p\u00e4\u00e4vaihetta: haihtuminen, tiivistyminen, sateet ja ker\u00e4\u00e4minen. Kulkiessaan t\u00e4m\u00e4n jatkuvan kierron l\u00e4pi vesi voi olla nestem\u00e4isess\u00e4 (vesi), kaasumaisessa (h\u00f6yry) tai kiinte\u00e4ss\u00e4 (j\u00e4\u00e4) olomuodossa. Ensin vesi haihtuu, sitten se muodostaa ja tiivistyy pilviksi, ja lopulta se sataa ja putoaa takaisin maahan. Sen j\u00e4lkeen vesi ker\u00e4\u00e4ntyy meriin ja jokiin, ja veden kierto toistuu yh\u00e4 uudelleen!<\/p>\n<h2>Katso <\/h2>\n<p>Tutustutaanpa tarkemmin veden kiertokulkuun:\u00a0<\/p>\n<figure class=\"wp-block-embed is-type-video\"><iframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/yVQEslsaIgY\" title=\"YouTube-videosoitin\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen><\/iframe><\/figure>\n<h2>Tietokilpailu <\/h2>\n<figure class=\"wp-block-embed is-type-video\"><iframe src=\"https:\/\/paxigames.esa.int\/Games\/Trivia\/trivia.html?lan=en&#038;topic=14\" width=\"900\" height=\"500\" scrolling=\"no \"allowfullscreen=\"true\" webkitallowfullscreen=\"true\" mozallowfullscreen=\"true\" ><\/iframe><\/figure>","protected":false},"excerpt":{"rendered":"<p>Did you know that the Earth has been recycling water for over 4 billion years? Every living thing on Earth needs water to survive and the water that we drink [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"esa_banner_image":"https:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2017\/10\/water_cycle\/17879551-2-eng-GB\/Water_cycle.jpg","esa_banner_description":"","esa_banner_credit":"ESA","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2017\/10\/Water_cycle","esa_external_url":"","esa_external_new_window":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":true},"categories":[10,36],"tags":[2],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-211","post","type-post","status-publish","format-standard","hentry","category-learn","category-lessons","tag-background-article"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/211","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/comments?post=211"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/211\/revisions"}],"predecessor-version":[{"id":1354,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/211\/revisions\/1354"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/media?parent=211"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/categories?post=211"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/tags?post=211"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/panel?post=211"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/language?post=211"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/age?post=211"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/duration?post=211"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/resource_type?post=211"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/audience?post=211"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/wf_post_folders?post=211"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}