{"id":5879,"date":"2025-02-28T21:09:17","date_gmt":"2025-02-28T20:09:17","guid":{"rendered":"https:\/\/agora.xtec.cat\/escolaantonibergosbutsenit\/?p=5879"},"modified":"2025-02-28T21:27:23","modified_gmt":"2025-02-28T20:27:23","slug":"experimentem-amb-imants-a-laula-dels-caragols","status":"publish","type":"post","link":"https:\/\/agora.xtec.cat\/escolaantonibergosbutsenit\/general\/experimentem-amb-imants-a-laula-dels-caragols\/","title":{"rendered":"EXPERIMENTEM AMB IMANTS A L’AULA DELS CARAGOLS"},"content":{"rendered":"

Primer hem observat i manipulat els imants i hem fet hip\u00f2tesis de per qu\u00e8 els imants s\u2019atreuen i alguns es repel\u00b7leixen.<\/p>\n

Hem fet un llistat d\u2019objectes que creiem que s\u2019atreuen als imants; com poden ser botons, xinxetes, cargols (estris), … i tamb\u00e9 els objectes o llocs on els imants s\u2019hi poden adherir, com per exemple als objectes de ferro, metall, a la nevera, a l\u2019estufa, …<\/p>\n

Seguidament vam descobrir dues safates de sorra a l\u2019aula, on hi havien tresors amagats. Hav\u00edem de descobrir quins eren; per\u00f2 estava prohibit usar les mans per a desenterrar-los; aix\u00ed que ens vam ajudar amb els imants.<\/p>\n

Per\u00f2 era massa f\u00e0cil, aix\u00ed que com ha obstacle, entre els imants i la sorra hi havia un full en mig; de manera que quan aprop\u00e0vem els imants al full, a l\u2019altra banda d\u2019aquest, s\u2019hi quedaven enganxats els tresors,…que entretingut ens\u00a0 va semblar trobar-los!!!<\/p>\n

En girar el full hi havia adherits tots els tresors, que s\u2019havien enganxat per l\u2019efecte d\u2019atracci\u00f3 dels imants,…va ser divertid\u00edssim, vam col\u00b7leccionar un munt de tresors (agulles imperdibles, botons imantats, clip, cascavells, monedes, ….)<\/p>\n

I ens ho vam passar d\u2019all\u00f2 m\u00e9s b\u00e9 escampant sorra i tresors per tot arreu!!<\/p>\n

Ten\u00edem m\u00e9s ganes de descobrir coses que atraguessin els imants, aix\u00ed que ens vam despla\u00e7ar per l\u2019aula buscant objectes, com el metall, on s\u2019adherissin els imants i en vam trobar molts (frontisses de les portes, ampolles d\u2019aigua, les potes de les cadires, les potes de les taules,…)<\/p>\n

El \u00a0poder d\u2019atracci\u00f3 i repulsi\u00f3<\/u><\/strong> dels imants:<\/p>\n

De qu\u00e8 dep\u00e8n que uns elements s’enganxin i altres se separin?<\/p>\n

Aix\u00f2 s\u2019explica per una caracter\u00edstica molt curiosa dels imants, i \u00e9s que si apropem dos imants, un pel pol nord i un altre pel pol sud, s’enganxen; per tant hi ha una\u00a0for\u00e7a d’atracci\u00f3<\/strong>.<\/p>\n

En canvi, si els aproximem pel mateix pol els imants se separen fins a un punt on ja no noten la for\u00e7a l’un de l’altre, d\u2019aix\u00f2 se’n diu\u00a0for\u00e7a de repulsi\u00f3.<\/strong><\/p>\n

Per\u00f2 hi ha altres coses que tamb\u00e9 hi influeixen.<\/p>\n

Si, per exemple, volem atraure un clip amb un imant, creus que ser\u00e0 igual que el clip estigui a prop o lluny? Imagino que penses que no, oi? Que com m\u00e9s proper es troba de l’imant ser\u00e0 atret amb m\u00e9s for\u00e7a.<\/p>\n

Estic completament d’acord, per\u00f2 nom\u00e9s pensar-ho no ens val, perqu\u00e8 som\u00a0cient\u00edfics<\/strong>, aix\u00ed que et tocar\u00e0 agafar el teu imant i col\u00b7locar el clip a diferents dist\u00e0ncies per comprovar que perd la for\u00e7a quan l’allunyem.<\/p>\n

Et recordes del\u00a0\u00abcamp magn\u00e8tic\u00bb<\/strong>\u00a0de qu\u00e8 parl\u00e0vem a l’experiment anterior? Doncs, en allunyar el clip, arriba un moment en qu\u00e8 queda fora d’aquest camp magn\u00e8tic, que \u00e9s el territori sobre el qual t\u00e9 poder el nostre imant i per aix\u00f2 deixa de funcionar el\u00a0magnetisme<\/strong>.<\/p>\n

Finalment vam experimentar amb pedres d’imant, que s\u00f3n peces naturalment imantades de magnetita; mineral del grup dels \u00f2xids, molt dens, fr\u00e0gil, dur i amb propietats ferromagn\u00e8tiques, \u00e9s capa\u00e7 d’atreure el ferro i l’acer juntament amb altres metalls. Les propietats del magnetisme va ser descobertes a l’antiguitat a trav\u00e9s d’aquestes pedres.<\/p>\n

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Primer hem observat i manipulat els imants i hem fet hip\u00f2tesis de per qu\u00e8 els imants s\u2019atreuen i alguns es repel\u00b7leixen. Hem fet un llistat d\u2019objectes que creiem que s\u2019atreuen als imants; com poden ser botons, xinxetes, cargols (estris), … i tamb\u00e9 els objectes o llocs on els imants s\u2019hi poden adherir, com per exemple […]<\/p>\n","protected":false},"author":1,"featured_media":5919,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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