{"id":526,"date":"2021-12-31T16:40:00","date_gmt":"2021-12-31T14:40:00","guid":{"rendered":"http:\/\/www.cosmoespai.com\/cat\/?p=526"},"modified":"2021-12-28T22:42:51","modified_gmt":"2021-12-28T20:42:51","slug":"com-es-forma-la-neu","status":"publish","type":"post","link":"https:\/\/www.cosmoespai.com\/cat\/com-es-forma-la-neu\/","title":{"rendered":"Com es forma la neu?"},"content":{"rendered":"\n<p class=\"has-text-align-justify\">La neu \u00e9s un s\u00edmbol caracter\u00edstic de l\u2019hivern, i la que fa possible diverses activitats de muntanya. No obstant, el proc\u00e9s de formaci\u00f3 de la neu \u00e9s lent, i s\u2019han de donar unes condicions especials per a que aquest proc\u00e9s tingui lloc.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><em><u><strong>La formaci\u00f3 de la neu<\/strong><\/u><\/em><\/h4>\n\n\n\n<p>Per a que es formi neu es necessiten dues coses:<\/p>\n\n\n\n<ul><li>Una temperatura atmosf\u00e8rica per sota del punt de congelaci\u00f3 de l\u2019aigua, ja que l\u2019aigua s\u2019ha de convertir en gel.<\/li><\/ul>\n\n\n\n<ul><li>I una humiditat suficient de l\u2019aire, ja que l\u2019aigua ha d\u2019estar present per a la formaci\u00f3 de neu.<\/li><\/ul>\n\n\n\n<p class=\"has-text-align-justify\">El vapor d\u2019aigua que es converteixi en gel es formar\u00e0 al voltant de petites part\u00edcules, com pols o grans de sorra, per formar diminuts cristalls de gel. Conforme passa el temps els cristalls de gel continuen creixent a mesura que m\u00e9s vapor d\u2019aigua es congela a la seva superf\u00edcie.<\/p>\n\n\n\n<p class=\"has-text-align-justify\">Un cop han crescut suficientment, els cristalls de gel passen a considerar-se flocs de neu. Aquests \u00faltims s\u00f3n suficientment grans i pesants com per caure del n\u00favol, i arribar a terra.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><em><u><strong>Neu \u00abhumida\u00bb i neu \u00abseca\u00bb<\/strong><\/u><\/em><\/h4>\n\n\n\n<p class=\"has-text-align-justify\">La mida i composici\u00f3 d\u2019un floc de neu dep\u00e8n del nombre de cristalls de gel que s\u2019han agrupat, i aix\u00f2 estar\u00e0 determinat per la temperatura de l\u2019aire:<\/p>\n\n\n\n<ul><li>Si els flocs de neu passen a trav\u00e9s d\u2019aire \u00abcalent\u00bb (una mica per sobre dels 0\u00baC), es comen\u00e7aran a desfer pels voltants, i a enganxar-se amb altres flocs de neu o part\u00edcules de gel, per convertir-se en grans i pesants flocs de neu. Aix\u00f2 crea neu \u00abhumida\u00bb, que s\u2019enganxa amb facilitat i \u00e9s bona per fer ninots de neu.<\/li><\/ul>\n\n\n\n<ul><li>Pel contrari, els folcs de neu que cauen per aire sec i fred, seran flocs de neu en pols que no s\u2019enganxen amb facilitat. Aquest \u00e9s el tipus de neu m\u00e9s apreciada per les activitats d\u2019esqu\u00ed.<\/li><\/ul>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<p><strong>Entrades Similars:<\/strong><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/2021\/05\/03\/que-es-lespectre-electromagnetic\/\"><a href=\"http:\/\/www.cosmoespai.com\/cat\/per-que-el-mar-es-de-color-blau\/\">Per qu\u00e8 el mar \u00e9s de color blau?<\/a><\/a><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/2021\/08\/13\/per-que-el-cel-es-blau\/\">Per qu\u00e8 el cel \u00e9s blau?<\/a><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/2021\/08\/20\/per-que-el-cel-es-torna-vermell-a-la-posta-de-sol\/\">Per qu\u00e8 el cel es torna vermell a la posta de Sol?<\/a><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/2021\/04\/16\/per-que-lespai-es-negre-si-hi-ha-tantes-estrelles\/\">Per qu\u00e8 l\u2019espai \u00e9s negre, si hi ha tantes estrelles?<\/a><\/p>\n\n\n\n<p><strong>Entrades Populars:<\/strong><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/2020\/09\/09\/perque-la-lluna-nomes-ens-ensenya-una-cara\/\">Perqu\u00e8 la Lluna nom\u00e9s ens ensenya una cara?<\/a><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/2020\/12\/11\/stephenson-2-18-lestrella-mes-gran-coneguda-a-lunivers\/\">Stephenson 2-18, l\u2019estrella m\u00e9s gran coneguda a l\u2019univers<\/a><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/2021\/01\/29\/lexplotacio-minera-al-cinturo-dasteroides-una-font-de-recursos\/\">L\u2019explotaci\u00f3 minera al cintur\u00f3 d\u2019asteroides, una font de recursos<\/a><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/2021\/02\/05\/la-brossa-espacial-un-gran-problema\/\">La brossa espacial, un gran problema<\/a><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/2021\/05\/14\/com-es-van-extingir-els-dinosaures\/\">Com es van extingir els dinosaures?<\/a><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/2021\/04\/09\/que-passaria-si-la-terra-deixes-de-rotar\/\">Qu\u00e8 passaria si la Terra deix\u00e9s de rotar?<\/a><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/2021\/02\/19\/la-missio-a-venus-de-la-sonda-venus-express-per-la-esa\/\">La missi\u00f3 a Venus de la sonda Venus Express per la ESA<\/a><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/2021\/01\/08\/quins-son-els-requisits-per-a-ser-un-planeta\/\">Quins s\u00f3n els requisits per a ser un planeta?<\/a><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/2021\/01\/01\/perque-no-es-poden-sentir-sons-a-lespai\/\">Perqu\u00e8 no es poden sentir sons a l\u2019espai?<\/a><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/2020\/10\/10\/quina-mida-i-forma-tindrien-els-extraterrestres\/\">Quina mida i forma tindrien els extraterrestres?<\/a><\/p>\n\n\n\n<p><a href=\"http:\/\/www.cosmoespai.com\/cat\/2021\/04\/02\/les-unitats-de-mesura-que-fem-servir-en-astronomia\/\">Les unitats de mesura que fem servir en astronomia<\/a><\/p>\n\n\n\n<p><strong>Entrades Recents:<\/strong><\/p>\n\n\n<ul class=\"wp-block-latest-posts__list is-grid columns-3 wp-block-latest-posts\"><li><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/www.cosmoespai.com\/cat\/com-viatjar-al-futur-sense-violar-les-lleis-de-la-fisica\/\">Com Viatjar al Futur Sense Violar les Lleis de la F\u00edsica<\/a><\/li>\n<li><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/www.cosmoespai.com\/cat\/que-es-la-gravetat\/\">Qu\u00e8 \u00e9s la gravetat?<\/a><\/li>\n<li><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/www.cosmoespai.com\/cat\/per-que-hi-ha-mes-materia-que-antimateria-a-lunivers\/\">Per qu\u00e8 hi ha m\u00e9s mat\u00e8ria que antimat\u00e8ria a l\u2019univers?<\/a><\/li>\n<li><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/www.cosmoespai.com\/cat\/que-es-lantimateria\/\">Qu\u00e8 \u00e9s l\u2019antimat\u00e8ria?<\/a><\/li>\n<li><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/www.cosmoespai.com\/cat\/per-que-els-centres-de-les-galaxies-contenen-forats-negres\/\">Per qu\u00e8 els centres de les gal\u00e0xies contenen forats negres?<\/a><\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>La neu \u00e9s un s\u00edmbol caracter\u00edstic de l\u2019hivern, i la que fa possible diverses activitats de muntanya. No obstant, el proc\u00e9s de formaci\u00f3 de la<span class=\"read-more-link\"><a class=\"read-more\" href=\"https:\/\/www.cosmoespai.com\/cat\/com-es-forma-la-neu\/\">Continuar llegint<\/a><\/span><\/p>\n","protected":false},"author":1,"featured_media":527,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":""},"categories":[134],"tags":[505,502,71,503,257,491,504,36],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2021\/12\/Formaci\u00f3_Neu.jpg?fit=720%2C405","jetpack_sharing_enabled":true,"jetpack_likes_enabled":true,"jetpack-related-posts":[{"id":728,"url":"https:\/\/www.cosmoespai.com\/cat\/com-es-produeixen-els-llamps\/","url_meta":{"origin":526,"position":0},"title":"Com es produeixen els llamps?","author":"Ferran","date":"2 de setembre de 2022","format":false,"excerpt":"Els llamps s\u00f3n un fenomen natural pel qual els n\u00favols descarreguen una quantitat enorme d\u2019energia sobre la Terra. Tot i que sabem des de fa temps les condicions necess\u00e0ries per que es produeixin llamps, predir quan i on tindran lloc els llamps no \u00e9s possible. Generaci\u00f3 del camp el\u00e8ctric Les\u2026","rel":"","context":"A &quot;La Terra&quot;","block_context":{"text":"La Terra","link":"https:\/\/www.cosmoespai.com\/cat\/category\/sistema-solar\/la-terra\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/09\/Llamps.jpg?fit=720%2C405&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/09\/Llamps.jpg?fit=720%2C405&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/09\/Llamps.jpg?fit=720%2C405&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/09\/Llamps.jpg?fit=720%2C405&resize=700%2C400 2x"},"classes":[]},{"id":266,"url":"https:\/\/www.cosmoespai.com\/cat\/neu-al-sahara-un-fenomen-poc-comu\/","url_meta":{"origin":526,"position":1},"title":"Neu al S\u00e0hara, un fenomen poc com\u00fa","author":"Ferran","date":"26 de febrer de 2021","format":false,"excerpt":"A l\u2019hivern neva a bona part del planeta, per\u00f2 veure com cau neu a un dels llocs m\u00e9s calents de la Terra \u00e9s un fenomen excepcional. No obstant aix\u00f2, les dades revelen que, durant els \u00faltims anys, veure nevar al S\u00e0hara \u00e9s cada vegada m\u00e9s habitual. El S\u00e0hara \u00e9s el\u2026","rel":"","context":"A &quot;La Terra&quot;","block_context":{"text":"La Terra","link":"https:\/\/www.cosmoespai.com\/cat\/category\/sistema-solar\/la-terra\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2021\/02\/Neu_S\u00e0hara.jpg?fit=720%2C405&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2021\/02\/Neu_S\u00e0hara.jpg?fit=720%2C405&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2021\/02\/Neu_S\u00e0hara.jpg?fit=720%2C405&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2021\/02\/Neu_S\u00e0hara.jpg?fit=720%2C405&resize=700%2C400 2x"},"classes":[]},{"id":652,"url":"https:\/\/www.cosmoespai.com\/cat\/per-que-fa-mes-calor-a-lequador-que-als-pols\/","url_meta":{"origin":526,"position":2},"title":"Per qu\u00e8 fa m\u00e9s calor a l\u2019equador que als pols?","author":"Ferran","date":"19 de juny de 2022","format":false,"excerpt":"Un error com\u00fa \u00e9s pensar que fa m\u00e9s calor a l\u2019equador perqu\u00e8 es troba m\u00e9s a prop del Sol que altres zones de la Terra. No obstant, la dist\u00e0ncia que separa l\u2019equador dels pols \u00e9s tant petita, en comparaci\u00f3 a l\u2019enorme dist\u00e0ncia que separa la Terra del Sol, (150 000\u2026","rel":"","context":"A &quot;La Terra&quot;","block_context":{"text":"La Terra","link":"https:\/\/www.cosmoespai.com\/cat\/category\/sistema-solar\/la-terra\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/06\/Temperatura_Equador-1.jpg?fit=720%2C405&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/06\/Temperatura_Equador-1.jpg?fit=720%2C405&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/06\/Temperatura_Equador-1.jpg?fit=720%2C405&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/06\/Temperatura_Equador-1.jpg?fit=720%2C405&resize=700%2C400 2x"},"classes":[]},{"id":297,"url":"https:\/\/www.cosmoespai.com\/cat\/que-passaria-si-la-terra-deixes-de-rotar\/","url_meta":{"origin":526,"position":3},"title":"Qu\u00e8 passaria si la Terra deix\u00e9s de rotar?","author":"Ferran","date":"9 d'abril de 2021","format":false,"excerpt":"Aquesta \u00e9s una situaci\u00f3 impossible. La Terra no pot parar de rotar de cop, per\u00f2, si ho fes, les conseq\u00fc\u00e8ncies serien desastroses. Tot i aix\u00ed, ens serveix per entendre millor conceptes f\u00edsics i cient\u00edfics que d\u2019altra forma no ens plantejar\u00edem. Aquestes s\u00f3n algunes de les conseq\u00fc\u00e8ncies que tindrien lloc si\u2026","rel":"","context":"A &quot;La Terra&quot;","block_context":{"text":"La Terra","link":"https:\/\/www.cosmoespai.com\/cat\/category\/sistema-solar\/la-terra\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2021\/04\/Terra_DeixarRotar.jpg?fit=720%2C405&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2021\/04\/Terra_DeixarRotar.jpg?fit=720%2C405&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2021\/04\/Terra_DeixarRotar.jpg?fit=720%2C405&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2021\/04\/Terra_DeixarRotar.jpg?fit=720%2C405&resize=700%2C400 2x"},"classes":[]},{"id":611,"url":"https:\/\/www.cosmoespai.com\/cat\/per-que-a-la-muntanya-fa-mes-fred-que-al-nivell-del-mar\/","url_meta":{"origin":526,"position":4},"title":"Per qu\u00e8 a la muntanya fa m\u00e9s fred que al nivell del mar?","author":"Ferran","date":"22 d'abril de 2022","format":false,"excerpt":"\u00c9s sabut per tothom que al nivell del mar hi ha una temperatura m\u00e9s c\u00e0lida que al cim d\u2019una muntanya. No obstant, molta gent no sabria explicar per qu\u00e8 succeeix aquest fenomen. En aquest article explicar\u00e9 els dos motius principals pels que fa m\u00e9s fred a la muntanya. Pressi\u00f3 atmosf\u00e8rica\u2026","rel":"","context":"A &quot;General&quot;","block_context":{"text":"General","link":"https:\/\/www.cosmoespai.com\/cat\/category\/general\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/04\/Muntanyes_Fred.jpg?fit=720%2C405&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/04\/Muntanyes_Fred.jpg?fit=720%2C405&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/04\/Muntanyes_Fred.jpg?fit=720%2C405&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/04\/Muntanyes_Fred.jpg?fit=720%2C405&resize=700%2C400 2x"},"classes":[]},{"id":738,"url":"https:\/\/www.cosmoespai.com\/cat\/com-funcionen-els-parallamps\/","url_meta":{"origin":526,"position":5},"title":"Com funcionen els parallamps?","author":"Ferran","date":"17 de setembre de 2022","format":false,"excerpt":"Els llamps s\u00f3n uns fen\u00f2mens molt perillosos. S\u00f3n els responsables de moltes morts i ferides greus cada any. Per protegir els edificis del possible impacte d\u2019un llamp s\u2019instal\u00b7len els parallamps, que consisteixen en una estructura de metall que permet atreure els llamps dirigits a un edifici. La finalitat dels parallamps\u2026","rel":"","context":"A &quot;General&quot;","block_context":{"text":"General","link":"https:\/\/www.cosmoespai.com\/cat\/category\/general\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/09\/Parallamps.jpg?fit=720%2C405&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/09\/Parallamps.jpg?fit=720%2C405&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/09\/Parallamps.jpg?fit=720%2C405&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.cosmoespai.com\/cat\/wp-content\/uploads\/2022\/09\/Parallamps.jpg?fit=720%2C405&resize=700%2C400 2x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/posts\/526"}],"collection":[{"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/comments?post=526"}],"version-history":[{"count":2,"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/posts\/526\/revisions"}],"predecessor-version":[{"id":529,"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/posts\/526\/revisions\/529"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/media\/527"}],"wp:attachment":[{"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/media?parent=526"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/categories?post=526"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.cosmoespai.com\/cat\/wp-json\/wp\/v2\/tags?post=526"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}