{"id":1574,"date":"2021-03-23T10:25:00","date_gmt":"2021-03-23T09:25:00","guid":{"rendered":"https:\/\/dapi.ch\/ecole\/?p=1574"},"modified":"2021-03-24T07:52:46","modified_gmt":"2021-03-24T06:52:46","slug":"les-melanges-de-matiere","status":"publish","type":"post","link":"https:\/\/dapi.ch\/ecole\/2021\/03\/23\/les-melanges-de-matiere\/","title":{"rendered":"Les m\u00e9langes de mati\u00e8res"},"content":{"rendered":"\n<p>Nous avons m\u00e9lang\u00e9 diff\u00e9rents liquides entre eux pour observer comment ils r\u00e9agissaient.<\/p>\n<p>Nous avons fait des hypoth\u00e8ses. Certaines se sont confirm\u00e9es, d&rsquo;autres non.<\/p>\n<p>On peut m\u00e9langer deux\u00a0 liquides. Il ne se passe pas la m\u00eame chose si on m\u00e9lange de l&rsquo;eau et du vinaigre ou du sirop et de l&rsquo;eau avec de l&rsquo;huile. Quand l&rsquo;eau est m\u00e9lang\u00e9e avec le vinaigre ou le sirop, on ne peut pas distinguer les deux \u00e9l\u00e9ments. On dit que c&rsquo;est un m\u00e9lange <strong>homog\u00e8ne<\/strong>. En revanche, l&rsquo;eau et l&rsquo;huile ne se m\u00e9langent pas. On dit que c&rsquo;est un m\u00e9lange <strong>h\u00e9t\u00e9rog\u00e8ne<\/strong>.<\/p>\n<p>C&rsquo;est la m\u00eame chose lorsqu&rsquo;on m\u00e9lange un liquide et un solide. En m\u00e9langeant de l&rsquo;eau avec du sel ou du sucre, on obtient un m\u00e9lange dans lequel on ne peut pas voir la diff\u00e9rence entre les substance. C&rsquo;est un m\u00e9lange homog\u00e8ne. Lorsqu&rsquo;on m\u00e9lange de l&rsquo;eau et du sable, on voit les particules en suspension dans l&rsquo;eau. C&rsquo;est un m\u00e9lange h\u00e9t\u00e9rog\u00e8ne.<\/p>\n<p>Nous avons observ\u00e9 aussi un m\u00e9lange entre de l&rsquo;eau et du gaz : l&rsquo;eau gazeuse (eau + CO2).<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"580\" height=\"508\" data-attachment-id=\"1575\" data-permalink=\"https:\/\/dapi.ch\/ecole\/2021\/03\/23\/les-melanges-de-matiere\/capture-decran-2021-03-23-a-10-16-40\/\" data-orig-file=\"https:\/\/i0.wp.com\/dapi.ch\/ecole\/wp-content\/uploads\/2021\/03\/Capture-de%CC%81cran-2021-03-23-a%CC%80-10.16.40.png?fit=1146%2C1004&amp;ssl=1\" data-orig-size=\"1146,1004\" data-comments-opened=\"0\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"Capture-de\u0301cran-2021-03-23-a\u0300-10.16.40\" data-image-description=\"\" data-image-caption=\"\" data-medium-file=\"https:\/\/i0.wp.com\/dapi.ch\/ecole\/wp-content\/uploads\/2021\/03\/Capture-de%CC%81cran-2021-03-23-a%CC%80-10.16.40.png?fit=300%2C263&amp;ssl=1\" data-large-file=\"https:\/\/i0.wp.com\/dapi.ch\/ecole\/wp-content\/uploads\/2021\/03\/Capture-de%CC%81cran-2021-03-23-a%CC%80-10.16.40.png?fit=580%2C508&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/dapi.ch\/ecole\/wp-content\/uploads\/2021\/03\/Capture-de%CC%81cran-2021-03-23-a%CC%80-10.16.40-1024x897.png?resize=580%2C508&#038;ssl=1\" alt=\"\" class=\"wp-image-1575\" srcset=\"https:\/\/i0.wp.com\/dapi.ch\/ecole\/wp-content\/uploads\/2021\/03\/Capture-de%CC%81cran-2021-03-23-a%CC%80-10.16.40.png?resize=1024%2C897&amp;ssl=1 1024w, https:\/\/i0.wp.com\/dapi.ch\/ecole\/wp-content\/uploads\/2021\/03\/Capture-de%CC%81cran-2021-03-23-a%CC%80-10.16.40.png?resize=300%2C263&amp;ssl=1 300w, https:\/\/i0.wp.com\/dapi.ch\/ecole\/wp-content\/uploads\/2021\/03\/Capture-de%CC%81cran-2021-03-23-a%CC%80-10.16.40.png?resize=768%2C673&amp;ssl=1 768w, https:\/\/i0.wp.com\/dapi.ch\/ecole\/wp-content\/uploads\/2021\/03\/Capture-de%CC%81cran-2021-03-23-a%CC%80-10.16.40.png?w=1146&amp;ssl=1 1146w\" sizes=\"auto, (max-width: 580px) 100vw, 580px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"580\" height=\"492\" data-attachment-id=\"1576\" data-permalink=\"https:\/\/dapi.ch\/ecole\/2021\/03\/23\/les-melanges-de-matiere\/capture-decran-2021-03-23-a-10-16-49\/\" data-orig-file=\"https:\/\/i0.wp.com\/dapi.ch\/ecole\/wp-content\/uploads\/2021\/03\/Capture-de%CC%81cran-2021-03-23-a%CC%80-10.16.49.png?fit=1145%2C971&amp;ssl=1\" data-orig-size=\"1145,971\" data-comments-opened=\"0\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"Capture-de\u0301cran-2021-03-23-a\u0300-10.16.49\" data-image-description=\"\" data-image-caption=\"\" data-medium-file=\"https:\/\/i0.wp.com\/dapi.ch\/ecole\/wp-content\/uploads\/2021\/03\/Capture-de%CC%81cran-2021-03-23-a%CC%80-10.16.49.png?fit=300%2C254&amp;ssl=1\" data-large-file=\"https:\/\/i0.wp.com\/dapi.ch\/ecole\/wp-content\/uploads\/2021\/03\/Capture-de%CC%81cran-2021-03-23-a%CC%80-10.16.49.png?fit=580%2C492&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/dapi.ch\/ecole\/wp-content\/uploads\/2021\/03\/Capture-de%CC%81cran-2021-03-23-a%CC%80-10.16.49-1024x868.png?resize=580%2C492&#038;ssl=1\" alt=\"\" class=\"wp-image-1576\" srcset=\"https:\/\/i0.wp.com\/dapi.ch\/ecole\/wp-content\/uploads\/2021\/03\/Capture-de%CC%81cran-2021-03-23-a%CC%80-10.16.49.png?resize=1024%2C868&amp;ssl=1 1024w, https:\/\/i0.wp.com\/dapi.ch\/ecole\/wp-content\/uploads\/2021\/03\/Capture-de%CC%81cran-2021-03-23-a%CC%80-10.16.49.png?resize=300%2C254&amp;ssl=1 300w, https:\/\/i0.wp.com\/dapi.ch\/ecole\/wp-content\/uploads\/2021\/03\/Capture-de%CC%81cran-2021-03-23-a%CC%80-10.16.49.png?resize=768%2C651&amp;ssl=1 768w, https:\/\/i0.wp.com\/dapi.ch\/ecole\/wp-content\/uploads\/2021\/03\/Capture-de%CC%81cran-2021-03-23-a%CC%80-10.16.49.png?w=1145&amp;ssl=1 1145w\" sizes=\"auto, (max-width: 580px) 100vw, 580px\" \/><\/figure>\n\n\n\n<p><iframe loading=\"lazy\" title=\"M\u00e9langes homog\u00e8nes et h\u00e9t\u00e9rog\u00e8nes : des exp\u00e9riences \u00e0 tester\" width=\"580\" height=\"326\" src=\"https:\/\/www.youtube.com\/embed\/vaKiUgwu4hY?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n","protected":false},"excerpt":{"rendered":"Nous avons m\u00e9lang\u00e9 diff\u00e9rents liquides entre eux pour observer comment ils r\u00e9agissaient. Nous avons fait des hypoth\u00e8ses. Certaines se sont confirm\u00e9es, d&rsquo;autres non. On peut m\u00e9langer deux\u00a0 liquides. Il ne se passe pas la m\u00eame chose si on m\u00e9lange de l&rsquo;eau et du vinaigre ou du sirop et de l&rsquo;eau avec de l&rsquo;huile. Quand l&rsquo;eau [&hellip;]","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"enabled":false},"version":2}},"categories":[51],"tags":[],"class_list":["post-1574","post","type-post","status-publish","format-standard","hentry","category-sciences"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/pavgxe-po","jetpack-related-posts":[{"id":1570,"url":"https:\/\/dapi.ch\/ecole\/2021\/03\/23\/peut-on-faire-bouillir-de-leau-a-plus-de-100-degres\/","url_meta":{"origin":1574,"position":0},"title":"Peut-on faire bouillir de l&rsquo;eau \u00e0 plus de 100 degr\u00e9s ?","author":"David Piot","date":"23 mars 2021","format":false,"excerpt":"Nous avons essay\u00e9 de r\u00e9pondre \u00e0 cette question en utilisant un r\u00e9chaud \u00e0 gaz, une casserole et de l'eau. Pour mesurer la temp\u00e9rature de l'eau, nous avons utilis\u00e9 un thermom\u00e8tre. Notre observation est la suivante : en chauffant l'eau, elle bout et se transforme en gaz (vapeur d'eau). M\u00eame en\u2026","rel":"","context":"Dans &quot;Sciences&quot;","block_context":{"text":"Sciences","link":"https:\/\/dapi.ch\/ecole\/category\/sciences\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/dapi.ch\/ecole\/wp-content\/uploads\/2021\/03\/IMG_5877.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/dapi.ch\/ecole\/wp-content\/uploads\/2021\/03\/IMG_5877.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/dapi.ch\/ecole\/wp-content\/uploads\/2021\/03\/IMG_5877.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/dapi.ch\/ecole\/wp-content\/uploads\/2021\/03\/IMG_5877.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/dapi.ch\/ecole\/wp-content\/uploads\/2021\/03\/IMG_5877.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/dapi.ch\/ecole\/wp-content\/uploads\/2021\/03\/IMG_5877.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":1400,"url":"https:\/\/dapi.ch\/ecole\/2021\/02\/13\/la-matiere\/","url_meta":{"origin":1574,"position":1},"title":"La mati\u00e8re","author":"David Piot","date":"13 f\u00e9vrier 2021","format":false,"excerpt":"La mati\u00e8re est ce qui compose l'univers (Vikidia). On peut la trouver en 3 \u00e9tats : Solide (comme la glace ou la neige) Liquide (comme l'eau) Gazeux (comme la vapeur) Nous avons observ\u00e9 ces 3 \u00e9tats avec l'application \u00c9tat de la mati\u00e8re sur l'iPad (Tinybop). Nous avons constat\u00e9 : que\u2026","rel":"","context":"Dans &quot;Sciences&quot;","block_context":{"text":"Sciences","link":"https:\/\/dapi.ch\/ecole\/category\/sciences\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/dapi.ch\/ecole\/wp-content\/uploads\/2021\/02\/H2o_hq2_alpha.png?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/dapi.ch\/ecole\/wp-content\/uploads\/2021\/02\/H2o_hq2_alpha.png?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/dapi.ch\/ecole\/wp-content\/uploads\/2021\/02\/H2o_hq2_alpha.png?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/dapi.ch\/ecole\/wp-content\/uploads\/2021\/02\/H2o_hq2_alpha.png?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":2438,"url":"https:\/\/dapi.ch\/ecole\/2025\/11\/20\/ecoute-2025\/","url_meta":{"origin":1574,"position":2},"title":"\u00c9coute 2025","author":"David Piot","date":"20 novembre 2025","format":false,"excerpt":"Musiques \u00e9cout\u00e9es et analys\u00e9es en classe : Maurice Ravel - Bol\u00e9ro (YouTube)Maurice Ravel - Daphnis et Chlo\u00e9 \/ Lever du jour (YouTube)Carl Orff - Carmina Burana \/ O Furtunata (YouTube)Johann Strauss - Le Beau Danube Bleu (YouTube)Chant Gr\u00e9gorien - Tantum Ergo (YouTube)Oscar Peterson - The A Train (YouTube)Queen - We\u2026","rel":"","context":"Dans &quot;Musique&quot;","block_context":{"text":"Musique","link":"https:\/\/dapi.ch\/ecole\/category\/musique\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/dapi.ch\/ecole\/wp-content\/uploads\/2025\/11\/Capture-decran-2025-11-20-a-12.46.33-1024x718.png?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/dapi.ch\/ecole\/wp-content\/uploads\/2025\/11\/Capture-decran-2025-11-20-a-12.46.33-1024x718.png?resize=350%2C200 1x, https:\/\/i0.wp.com\/dapi.ch\/ecole\/wp-content\/uploads\/2025\/11\/Capture-decran-2025-11-20-a-12.46.33-1024x718.png?resize=525%2C300 1.5x"},"classes":[]},{"id":1409,"url":"https:\/\/dapi.ch\/ecole\/2021\/02\/13\/quelle-est-la-temperature-de-la-glace-qui-fond\/","url_meta":{"origin":1574,"position":3},"title":"Quelle est la temp\u00e9rature de la glace qui fond ?","author":"David Piot","date":"13 f\u00e9vrier 2021","format":false,"excerpt":"Nous nous sommes pos\u00e9s la question suivante : est-ce que la temp\u00e9rature de la glace qui fond est la m\u00eame quelles que soient les conditions ? Nous avons \u00e9mis des hypoth\u00e8ses et nous avons test\u00e9 5 conditions : \u00c0 l'air libre \u00c0 c\u00f4t\u00e9 d'un radiateur Au froid (dehors) Dans un\u2026","rel":"","context":"Dans &quot;Sciences&quot;","block_context":{"text":"Sciences","link":"https:\/\/dapi.ch\/ecole\/category\/sciences\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/dapi.ch\/ecole\/wp-content\/uploads\/2021\/02\/IMG_0008-scaled.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/dapi.ch\/ecole\/wp-content\/uploads\/2021\/02\/IMG_0008-scaled.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/dapi.ch\/ecole\/wp-content\/uploads\/2021\/02\/IMG_0008-scaled.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/dapi.ch\/ecole\/wp-content\/uploads\/2021\/02\/IMG_0008-scaled.jpg?resize=700%2C400 2x, https:\/\/i0.wp.com\/dapi.ch\/ecole\/wp-content\/uploads\/2021\/02\/IMG_0008-scaled.jpg?resize=1050%2C600 3x, https:\/\/i0.wp.com\/dapi.ch\/ecole\/wp-content\/uploads\/2021\/02\/IMG_0008-scaled.jpg?resize=1400%2C800 4x"},"classes":[]},{"id":1608,"url":"https:\/\/dapi.ch\/ecole\/2021\/05\/20\/musique-ecoute\/","url_meta":{"origin":1574,"position":4},"title":"Musique &#8211; \u00e9coute","author":"David Piot","date":"20 mai 2021","format":false,"excerpt":"Musiques \u00e9cout\u00e9es et analys\u00e9es en classe : Maurice Ravel - Bol\u00e9ro (YouTube)Maurice Ravel - Daphnis et Chlo\u00e9 \/ Lever du jour (YouTube)Carl Orff - Carmina Burana \/ O Furtunata (YouTube)Johann Strauss - Le Beau Danube Bleu (YouTube)Chant Gr\u00e9gorien - Tantum Ergo (YouTube)Oscar Peterson - The A Train (YouTube)Queen - We\u2026","rel":"","context":"Dans &quot;Musique&quot;","block_context":{"text":"Musique","link":"https:\/\/dapi.ch\/ecole\/category\/musique\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/img.youtube.com\/vi\/2qiUCLa12wo\/0.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":1884,"url":"https:\/\/dapi.ch\/ecole\/2022\/02\/03\/semaine-19\/","url_meta":{"origin":1574,"position":5},"title":"Semaine 20","author":"Marion Baula","date":"3 f\u00e9vrier 2022","format":false,"excerpt":"Cher \u00e9l\u00e8ve, ch\u00e8re \u00e9l\u00e8ve, Nous esp\u00e9rons que vous vous portez bien, malgr\u00e9 cette p\u00e9riode particuli\u00e8re. Voici quelques activit\u00e9s \u00e0 r\u00e9aliser \u00e0 la maison le temps de votre quarantaine. Premi\u00e8re activit\u00e9 :\u00a0 pr\u00e9sentation d\u2019un livre que vous lisez en ce moment. Prenez une feuille et notez : Le titre du livre\u2026","rel":"","context":"Dans &quot;E\u00e0D&quot;","block_context":{"text":"E\u00e0D","link":"https:\/\/dapi.ch\/ecole\/category\/ead\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]}],"_links":{"self":[{"href":"https:\/\/dapi.ch\/ecole\/wp-json\/wp\/v2\/posts\/1574","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dapi.ch\/ecole\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dapi.ch\/ecole\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dapi.ch\/ecole\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dapi.ch\/ecole\/wp-json\/wp\/v2\/comments?post=1574"}],"version-history":[{"count":5,"href":"https:\/\/dapi.ch\/ecole\/wp-json\/wp\/v2\/posts\/1574\/revisions"}],"predecessor-version":[{"id":1589,"href":"https:\/\/dapi.ch\/ecole\/wp-json\/wp\/v2\/posts\/1574\/revisions\/1589"}],"wp:attachment":[{"href":"https:\/\/dapi.ch\/ecole\/wp-json\/wp\/v2\/media?parent=1574"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dapi.ch\/ecole\/wp-json\/wp\/v2\/categories?post=1574"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dapi.ch\/ecole\/wp-json\/wp\/v2\/tags?post=1574"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}