{"id":11447,"date":"2023-06-09T09:30:51","date_gmt":"2023-06-09T07:30:51","guid":{"rendered":"https:\/\/sceaux-lagazette.fr\/?p=11447"},"modified":"2023-06-08T18:36:46","modified_gmt":"2023-06-08T16:36:46","slug":"engrais-naturel-pour-physiciens-en-herbe","status":"publish","type":"post","link":"https:\/\/sceaux-lagazette.fr\/index.php\/2023\/06\/09\/engrais-naturel-pour-physiciens-en-herbe\/","title":{"rendered":"Engrais naturel pour physiciens en herbe"},"content":{"rendered":"\n<p>Voici de quoi s\u2019amuser tout en d\u00e9couvrant des ph\u00e9nom\u00e8nes de la nature&nbsp;! <em>50 exp\u00e9riences scientifiques pour les petits physiciens du weekend,<\/em> qui vient de para\u00eetre aux Editions Delachaux et Niestl\u00e9, est un livre ludique, pratique et \u00e9rudit.<\/p>\n\n\n\n<p>Les auteurs s\u2019en sont donn\u00e9 les moyens. En s\u2019y mettant \u00e0 trois, ils ne risquaient pas de rater leur cible, la tranche d\u2019\u00e2ge autour des ann\u00e9es coll\u00e8ge. Nikita est en 6<sup>e<\/sup>, Nathana\u00ebl en 3<sup>e<\/sup>, les deux sont \u00e0 Marie-Curie, tandis que leur p\u00e8re, Auguste Gires, est chercheur en g\u00e9oscience.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Rituel familial<\/h2>\n\n\n\n<p>Le livre est le r\u00e9sultat d\u2019une pratique que la famille a adopt\u00e9e, \u00e0 savoir une exp\u00e9rience chaque weekend. De quoi roder la p\u00e9dagogie. Cela dure un quart d\u2019heure, une demie heure tout au plus. Le but n\u2019est pas de se chauffer pour le HPI. La relation entre le p\u00e8re et ses fils reste ludique. Pas de rythme effr\u00e9n\u00e9. On transmet et on s\u2019amuse. On s\u2019\u00e9tonne du monde. On est ensemble.<\/p>\n\n\n\n<p>Depuis plus de 5 ans, Nikita \u00e9tait alors au cours pr\u00e9paratoire, ce sont environ 270 exp\u00e9riences qui ont \u00e9t\u00e9 r\u00e9alis\u00e9es mine de rien, sans forcer. Auguste Gires trouve son inspiration dans les questions de la vie courante, ses lectures en physique, sur des sites ou son travail de chercheur. Il part d\u2019un principe et se demande comment le mettre en \u00e9vidence par une exp\u00e9rience. C\u2019est l\u2019int\u00e9r\u00eat du livre de mettre en regard des r\u00e9alit\u00e9s simples \u00e0 observer et des explications qui ouvrent sur des notions physiques importantes.<\/p>\n\n\n\n<p>\u00ab\u00a0<em>L\u2019exp\u00e9rience du chocolat, dit Auguste Gires, m\u2019est venue \u00e0 l\u2019esprit en lisant un livre sur les nanotechnologies.\u00a0<\/em>\u00bb L\u2019exp\u00e9rience r\u00e9pond \u00e0 la question candide\u00a0: \u00ab\u00a0<em>Pourquoi le chocolat en poudre se m\u00e9lange-t-il mieux au lait qu\u2019un simple carr\u00e9 de chocolat\u00a0<\/em>?\u00a0\u00bb On appr\u00e9ciera le travail de l\u2019inspiration qui a conduit \u00e0 la question en partant de technologies pour le moins obscures. Quiconque a servi le chocolat du matin sera curieux de savoir comment on peut raisonner \u00e0 l\u2019\u00e9chelle des particules et, surtout, en quoi cela peut rester \u00e0 la port\u00e9e des enfants.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1024\" height=\"566\" src=\"https:\/\/sceaux-lagazette.fr\/wp-content\/uploads\/2023\/06\/Gires-pere-et-fils-1024x566.jpg\" alt=\"\" class=\"wp-image-11452\" srcset=\"https:\/\/sceaux-lagazette.fr\/wp-content\/uploads\/2023\/06\/Gires-pere-et-fils-1024x566.jpg 1024w, https:\/\/sceaux-lagazette.fr\/wp-content\/uploads\/2023\/06\/Gires-pere-et-fils-300x166.jpg 300w, https:\/\/sceaux-lagazette.fr\/wp-content\/uploads\/2023\/06\/Gires-pere-et-fils-768x425.jpg 768w, https:\/\/sceaux-lagazette.fr\/wp-content\/uploads\/2023\/06\/Gires-pere-et-fils.jpg 1280w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Six mains<\/h2>\n\n\n\n<p>Pour passer d\u2019un rituel familial a un projet \u00e9ditorial, il a fallu se retrousser les manches. Ils se r\u00e9partissent le travail. Chacun prend sa part. Nikita d\u00e9crit le pas-\u00e0-pas de l\u2019exp\u00e9rience. Il est dans le c\u0153ur de cible, les plus jeunes obligent \u00e0 simplifier. Nathana\u00ebl met au propre et r\u00e9dige sur ordinateur, Auguste \u00e9crit les explications, dessine \u00e0 la main les croquis des montages. Les trois se rassemblent pour la relecture. Autour de l\u2019ordinateur, ils reprennent les retours de l\u2019\u00e9diteur. C\u2019est une partie difficile pour les enfants (peut-\u00eatre bien pour le p\u00e8re aussi), elle est en tout cas ingrate. Et pourtant, souligne Auguste Gires, \u00ab&nbsp;<em>les enfants \u00e9taient meilleurs que moi pour la mise \u00e0 jour des renvois aux exp\u00e9riences proches.<\/em>&nbsp;\u00bb<\/p>\n\n\n\n<p>Le beau travail d\u2019\u00e9dition, la fibre didactique et le talent graphique de l\u2019illustrateur, Vincent Cazas, le concours des nombreuses photos donnent au livre une grande facilit\u00e9 de lecture et d\u2019utilisation.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Que d\u2019eau, que d\u2019eau<\/h2>\n\n\n\n<p>Des souvenirs se sont d\u00e9j\u00e0 form\u00e9s. L\u2019exp\u00e9rience qui a le plus amus\u00e9 Nikita et Nathana\u00ebl est la fus\u00e9e \u00e0 eau. \u00ab&nbsp;<em>C\u2019est rigolo de pomper et de voir que \u00e7a fait d\u00e9coller la fus\u00e9e.&nbsp;<\/em>\u00bb Quel rapport en le fait de pomper et le d\u00e9collage&nbsp;? Myst\u00e8re. Avec un teasing pareil, comment ne pas aller commander le livre&nbsp;?<\/p>\n\n\n\n<p>Celle dont ils ont retenu le plus de choses&nbsp;? Pour Nikita, c\u2019est l\u2019\u00e9trange va-et-vient des raisins secs. Deux verres, l\u2019un rempli d\u2019eau p\u00e9tillante, l\u2019autre d\u2019eau plate. Dans l\u2019eau p\u00e9tillante, les raisins \u00ab&nbsp;accroch\u00e9s aux bulles&nbsp;\u00bb montent vers la surface et quand elles \u00e9clatent les raisins retombent. Dans l\u2019eau plate, rien de tel ne se produit. Le principe \u00e0 d\u00e9couvrir&nbsp;: la densit\u00e9. Celle des raisins change selon qu\u2019ils sont ou pas accol\u00e9s \u00e0 des bulles. Les mouvements vers (ou depuis) la surface rendent tout cela tangible.<\/p>\n\n\n\n<p>Nathana\u00ebl est particuli\u00e8rement touch\u00e9 par le verre retourn\u00e9 et l\u2019eau qui ne tombe pas. On est encore dans l\u2019eau, mais le principe est tout diff\u00e9rent. Un verre est rempli \u00e0 ras, on a mouill\u00e9 ses bords. La sc\u00e8ne se passera de pr\u00e9f\u00e9rence au-dessus d\u2019un \u00e9vier ou dans un jardin. Un disque de carton recouvre le verre. Retournez rapidement le verre tout en retenant le carton. Vous verrez. Nathana\u00ebl en tout cas fut bluff\u00e9. Et savoir la place que prend la pression atmosph\u00e9rique n\u2019\u00f4te rien de son \u00e9merveillement.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Apprendre et s\u2019amuser<\/h2>\n\n\n\n<p>Voil\u00e0 cinquante exp\u00e9riences nourries de quotidien qui s\u2019inscrivent dans une conviction. Pour Auguste Gires, la diffusion de la science passe par le d\u00e9veloppement de la curiosit\u00e9, de l\u2019envie de comprendre le monde qui nous entoure et comment il fonctionne. \u00ab\u00a0<em>Toucher plein de domaines. Mais aussi faire avec ce qu\u2019on a \u00e0 la maison ou au magasin d\u2019\u00e0 c\u00f4t\u00e9.\u00a0<\/em>\u00bb Le livre a un c\u00f4t\u00e9 MacGyver.<\/p>\n\n\n\n<p>Attendez-vous donc \u00e0 trouver comment dessaler de l\u2019eau, fabriquer un minimoteur \u00e9lectrique, multiplier sa force, faire danser un serpentin, et bien d\u2019autres choses pour passer tout plein de bons moments ensemble.<\/p>\n\n\n\n<p>Une s\u00e9ance de d\u00e9dicace aura lieu le 17 juin apr\u00e8s-midi au Roi Lire, rue Florian \u00e0 Sceaux.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Voici de quoi s\u2019amuser tout en d\u00e9couvrant des ph\u00e9nom\u00e8nes de la nature&nbsp;! 50 exp\u00e9riences scientifiques pour les petits physiciens du weekend, qui vient de para\u00eetre aux Editions Delachaux et Niestl\u00e9, est un livre ludique, pratique et \u00e9rudit. Les auteurs s\u2019en sont donn\u00e9 les moyens. En s\u2019y mettant \u00e0 trois, ils&#8230;<\/p>\n","protected":false},"author":6,"featured_media":11448,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"footnotes":""},"categories":[55,242],"tags":[],"class_list":["post-11447","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-detente","category-litterature","entry","simple"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Engrais naturel pour physiciens en herbe - La Gazette<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/sceaux-lagazette.fr\/index.php\/2023\/06\/09\/engrais-naturel-pour-physiciens-en-herbe\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Engrais naturel pour physiciens en herbe - La Gazette\" \/>\n<meta property=\"og:description\" content=\"Voici de quoi s\u2019amuser tout en d\u00e9couvrant des ph\u00e9nom\u00e8nes de la nature&nbsp;! 50 exp\u00e9riences scientifiques pour les petits physiciens du weekend, qui vient de para\u00eetre aux Editions Delachaux et Niestl\u00e9, est un livre ludique, pratique et \u00e9rudit. 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