{"id":16125,"date":"2026-06-08T11:28:39","date_gmt":"2026-06-08T09:28:39","guid":{"rendered":"https:\/\/www.evoluscience.fr\/?page_id=16125"},"modified":"2026-06-23T16:46:30","modified_gmt":"2026-06-23T14:46:30","slug":"activite-1","status":"publish","type":"page","link":"https:\/\/www.evoluscience.fr\/index.php\/sixieme\/partie-4\/chapitre-2-les-melanges\/activite-1\/","title":{"rendered":"Activit\u00e9 1"},"content":{"rendered":"\n<p class=\"has-vivid-green-cyan-color has-text-color has-link-color wp-elements-4cc87d9e7155daed28e0160ce777975a wp-block-paragraph\">Comment est organis\u00e9 un m\u00e9lange ?<\/p>\n\n\n\n<p class=\"has-background wp-block-paragraph\" style=\"background-color:#ffc69e\">Activit\u00e9 1 : Identification des constituants d&rsquo;un m\u00e9lange<\/p>\n\n\n\n<div style=\"height:34px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Comp\u00e9tences travaill\u00e9es\u00a0:<\/em><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><em>Saisir des informations dans un document<\/em><\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><em>Suivre un protocole<\/em><\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><em>R\u00e9aliser une exp\u00e9rience<\/em><\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><em>Travailler en groupe<\/em><\/li>\n<\/ul>\n\n\n\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Document 1<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img alt=\"\" loading=\"lazy\" decoding=\"async\" width=\"406\" height=\"236\" src=\"https:\/\/www.evoluscience.fr\/wp-content\/uploads\/2026\/06\/image-1.png\" alt=\"\" class=\"wp-image-16218\" style=\"aspect-ratio:1.7203866781434152;width:520px;height:auto\" srcset=\"https:\/\/www.evoluscience.fr\/wp-content\/uploads\/2026\/06\/image-1.png 406w, https:\/\/www.evoluscience.fr\/wp-content\/uploads\/2026\/06\/image-1-300x174.png 300w\" sizes=\"auto, (max-width: 406px) 100vw, 406px\" \/><\/figure>\n<\/div>\n\n\n<p class=\"has-text-align-center wp-block-paragraph\">Graphique en camembert repr\u00e9sentant les diff\u00e9rentes proportions des gaz dans l&rsquo;atmosph\u00e8re <\/p>\n\n\n\n<p class=\"has-small-font-size wp-block-paragraph\">Source : <a href=\"https:\/\/www.lelivrescolaire.fr\/page\/11040980\">https:\/\/www.lelivrescolaire.fr\/page\/11040980<\/a><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Indiquer la composition en gaz de l&rsquo;atmosph\u00e8re terrestre.<\/li>\n<\/ol>\n\n\n\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Document 2 : Comparaison d&rsquo;une \u00e9tiquette d&rsquo;une bouteille Cristaline (notre r\u00e9gion) et celle d&rsquo;une bouteille contrex<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-full\"><img alt=\"\" loading=\"lazy\" decoding=\"async\" width=\"355\" height=\"298\" data-id=\"16219\" src=\"https:\/\/www.evoluscience.fr\/wp-content\/uploads\/2026\/06\/image-2.png\" alt=\"\" class=\"wp-image-16219\" srcset=\"https:\/\/www.evoluscience.fr\/wp-content\/uploads\/2026\/06\/image-2.png 355w, https:\/\/www.evoluscience.fr\/wp-content\/uploads\/2026\/06\/image-2-300x252.png 300w\" sizes=\"auto, (max-width: 355px) 100vw, 355px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img alt=\"\" loading=\"lazy\" decoding=\"async\" width=\"380\" height=\"400\" data-id=\"16220\" src=\"https:\/\/www.evoluscience.fr\/wp-content\/uploads\/2026\/06\/image-3.png\" alt=\"\" class=\"wp-image-16220\" srcset=\"https:\/\/www.evoluscience.fr\/wp-content\/uploads\/2026\/06\/image-3.png 380w, https:\/\/www.evoluscience.fr\/wp-content\/uploads\/2026\/06\/image-3-285x300.png 285w\" sizes=\"auto, (max-width: 380px) 100vw, 380px\" \/><\/figure>\n<\/figure>\n<\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">2. Comparer la composition des eaux Cristaline et Contrex concernant le calcium, le magn\u00e9sium et le sulfate. Nous discuterons ensuite de leurs effets sur la sant\u00e9.<\/p>\n\n\n\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Document 3 : <\/p>\n\n\n\n<div class=\"wp-block-media-text is-stacked-on-mobile\" style=\"grid-template-columns:44% auto\"><figure class=\"wp-block-media-text__media\"><img alt=\"\" loading=\"lazy\" decoding=\"async\" width=\"761\" height=\"824\" src=\"https:\/\/www.evoluscience.fr\/wp-content\/uploads\/2026\/06\/image-5.png\" alt=\"\" class=\"wp-image-16222 size-full\" srcset=\"https:\/\/www.evoluscience.fr\/wp-content\/uploads\/2026\/06\/image-5.png 761w, https:\/\/www.evoluscience.fr\/wp-content\/uploads\/2026\/06\/image-5-277x300.png 277w, https:\/\/www.evoluscience.fr\/wp-content\/uploads\/2026\/06\/image-5-520x563.png 520w, https:\/\/www.evoluscience.fr\/wp-content\/uploads\/2026\/06\/image-5-740x801.png 740w\" sizes=\"auto, (max-width: 761px) 100vw, 761px\" \/><\/figure><div class=\"wp-block-media-text__content\">\n<p class=\"wp-block-paragraph\">Starship est un lanceur super lourd \u00e0 deux \u00e9tages , enti\u00e8rement r\u00e9utilisable , d\u00e9velopp\u00e9 par la soci\u00e9t\u00e9 a\u00e9rospatiale am\u00e9ricaine SpaceX . Actuellement, il est construit et lanc\u00e9 depuis Starbase au Texas. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n<\/div><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Une fois assembl\u00e9e et pleine de carburant, la fus\u00e9e Starship a une masse d&rsquo;environ 5 300 tonnes, un diam\u00e8tre de 9 m\u00e8tres et une hauteur de 121,3 m\u00e8tres. Con\u00e7ue pour \u00eatre enti\u00e8rement r\u00e9utilisable afin de r\u00e9duire les co\u00fbts de lancement, elle se compose du lanceur Super Heavy et de l&rsquo; \u00e9tage sup\u00e9rieur Starship , propuls\u00e9s par des moteurs Raptor .<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Les corps des deux \u00e9tages de la fus\u00e9e sont en acier inoxydable et sont fabriqu\u00e9s par empilement et soudage de cylindres en acier inoxydable.<br>L&rsquo;acier inoxydable, couramment appel\u00e9 acier inox ou inox, est un acier (alliage \u00e0 base de fer et de carbone), comportant moins de 1,2 % de carbone et plus de 10,5 % de chrome, dont la propri\u00e9t\u00e9 remarquable est d&rsquo;\u00eatre peu sensible \u00e0 la corrosion et de ne pas se d\u00e9grader en rouille.<\/p>\n\n\n\n<p class=\"has-small-font-size wp-block-paragraph\">Source : <a href=\"https:\/\/en.wikipedia.org\/wiki\/SpaceX_Starship#:~:text=The%20bodies%20of%20both%20rocket,the%20methane%20and%20oxygen%20tanks.\">https:\/\/en.wikipedia.org\/wiki\/SpaceX_Starship#:~:text=The%20bodies%20of%20both%20rocket,the%20methane%20and%20oxygen%20tanks.<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">3. Expliquer de quel mat\u00e9riau sont principalement compos\u00e9s les cylindres. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A partir du texte et de vos connaissances, expliquer la raison pour laquelle on a ici m\u00e9lang\u00e9 deux mati\u00e8res pour former cet alliage.<\/p>\n\n\n\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">On remarque ici que l\u2019air, l\u2019eau de source et l\u2019acier sont des m\u00e9langes mais qu\u2019on ne distingue pas les constituants. Cela n\u00e9cessite des analyses.<\/p>\n\n\n\n<p class=\"has-text-color has-link-color wp-elements-b5fbbe8a48550caecd195ec3759b8342 wp-block-paragraph\" style=\"color:#ff527d\"><strong>Un m\u00e9lange est un liquide, un solide ou un gaz qui est compos\u00e9 de plusieurs constituants.<\/strong><\/p>\n\n\n\n<p class=\"has-text-color has-link-color wp-elements-8bd98be7b56bd3efe24d3944ab06232d wp-block-paragraph\" style=\"color:#fd4573\"><strong>Un m\u00e9lange est dit homog\u00e8ne si l\u2019on ne peut pas distinguer ses diff\u00e9rents constituants.<\/strong><\/p>\n\n\n\n<p class=\"has-text-color has-link-color wp-elements-060e2cf6c93e1b196bf723ba99c3a3ba wp-block-paragraph\" style=\"color:#ff7799\"><strong>Deux liquides sont dits miscibles s\u2019ils peuvent se m\u00e9langer pour former un corps homog\u00e8ne.<\/strong><\/p>\n\n\n\n<p class=\"has-text-color has-link-color wp-elements-bc87d24f11bbc92b83f31de38a06d489 wp-block-paragraph\" style=\"color:#ff557f\"><strong>S\u2019ils ne sont pas miscibles, le m\u00e9lange est h\u00e9t\u00e9rog\u00e8ne<\/strong> (eau+ huile).<\/p>\n\n\n\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<div class=\"wp-block-media-text has-media-on-the-right is-stacked-on-mobile\" style=\"grid-template-columns:auto 37%\"><div class=\"wp-block-media-text__content\">\n<p class=\"wp-block-paragraph\">Des tests permettent de mettre en \u00e9vidence des constituants d\u2019un m\u00e9lange.<\/p>\n<\/div><figure class=\"wp-block-media-text__media\"><a href=\"https:\/\/www.evoluscience.fr\/index.php\/methodologie\/fiches-methodologiques\/realiser-la-demarche-scientifique\/\" target=\"_blank\" rel=\" noreferrer noopener\"><img alt=\"\" loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"330\" src=\"https:\/\/www.evoluscience.fr\/wp-content\/uploads\/2026\/06\/Icone-methodologie-1024x330.png\" alt=\"\" class=\"wp-image-16618 size-full\" srcset=\"https:\/\/www.evoluscience.fr\/wp-content\/uploads\/2026\/06\/Icone-methodologie-1024x330.png 1024w, https:\/\/www.evoluscience.fr\/wp-content\/uploads\/2026\/06\/Icone-methodologie-300x97.png 300w, https:\/\/www.evoluscience.fr\/wp-content\/uploads\/2026\/06\/Icone-methodologie-768x247.png 768w, https:\/\/www.evoluscience.fr\/wp-content\/uploads\/2026\/06\/Icone-methodologie-1536x494.png 1536w, https:\/\/www.evoluscience.fr\/wp-content\/uploads\/2026\/06\/Icone-methodologie-520x167.png 520w, https:\/\/www.evoluscience.fr\/wp-content\/uploads\/2026\/06\/Icone-methodologie-740x238.png 740w, https:\/\/www.evoluscience.fr\/wp-content\/uploads\/2026\/06\/Icone-methodologie.png 1790w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure><\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Document 4 : Test eau de chaux<\/p>\n\n\n\n<figure class=\"wp-block-video\"><video height=\"1080\" style=\"aspect-ratio: 1920 \/ 1080;\" width=\"1920\" controls src=\"https:\/\/www.evoluscience.fr\/wp-content\/uploads\/2026\/06\/Le-test-a-leau-de-chaux.mp4\"><\/video><\/figure>\n\n\n\n<p class=\"has-small-font-size wp-block-paragraph\">Source : <a href=\"https:\/\/www.youtube.com\/watch?v=68KNm9r-dKE\">https:\/\/www.youtube.com\/watch?v=68KNm9r-dKE<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">4. Expliquer ce que permet de tester l\u2019eau de chaux. Que se passe-t-il&nbsp;?<\/p>\n\n\n\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Document 5 : Test sulfate de cuivre anhydre<\/p>\n\n\n\n<figure class=\"wp-block-video\"><video height=\"1080\" style=\"aspect-ratio: 1920 \/ 1080;\" width=\"1920\" controls src=\"https:\/\/www.evoluscience.fr\/wp-content\/uploads\/2026\/06\/Test-de-reconnaissance-de-leau-\ud83d\udca6-Sulfate-de-cuivre-anhydre-Experience-Physique-Chimie.mp4\"><\/video><\/figure>\n\n\n\n<p class=\"has-small-font-size wp-block-paragraph\">Source : <a href=\"https:\/\/www.youtube.com\/watch?v=Qp-ya0XEPX4\">https:\/\/www.youtube.com\/watch?v=Qp-ya0XEPX4<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">5. Expliquer ce que permet de tester le sulfate de cuivre anhydre. Que se passe-t-il&nbsp;?<\/p>\n\n\n\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><a href=\"https:\/\/www.evoluscience.fr\/index.php\/sixieme\/partie-4\/chapitre-2-les-melanges\/activite-1\/conclusion-2\/\" target=\"_blank\" rel=\" noreferrer noopener\"><img alt=\"\" loading=\"lazy\" decoding=\"async\" width=\"538\" height=\"538\" src=\"https:\/\/www.evoluscience.fr\/wp-content\/uploads\/2019\/09\/conclusion.png\" alt=\"\" class=\"wp-image-370\" style=\"width:382px;height:auto\" srcset=\"https:\/\/www.evoluscience.fr\/wp-content\/uploads\/2019\/09\/conclusion.png 538w, https:\/\/www.evoluscience.fr\/wp-content\/uploads\/2019\/09\/conclusion-150x150.png 150w, https:\/\/www.evoluscience.fr\/wp-content\/uploads\/2019\/09\/conclusion-300x300.png 300w, https:\/\/www.evoluscience.fr\/wp-content\/uploads\/2019\/09\/conclusion-520x520.png 520w\" sizes=\"auto, (max-width: 538px) 100vw, 538px\" \/><\/a><\/figure>\n<\/div>\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img alt=\"\" loading=\"lazy\" decoding=\"async\" width=\"735\" height=\"735\" src=\"https:\/\/www.evoluscience.fr\/wp-content\/uploads\/2020\/03\/pjiece_jointe-1.png\" alt=\"\" class=\"wp-image-4366\" style=\"width:377px;height:auto\" srcset=\"https:\/\/www.evoluscience.fr\/wp-content\/uploads\/2020\/03\/pjiece_jointe-1.png 735w, https:\/\/www.evoluscience.fr\/wp-content\/uploads\/2020\/03\/pjiece_jointe-1-300x300.png 300w, https:\/\/www.evoluscience.fr\/wp-content\/uploads\/2020\/03\/pjiece_jointe-1-150x150.png 150w, https:\/\/www.evoluscience.fr\/wp-content\/uploads\/2020\/03\/pjiece_jointe-1-520x520.png 520w\" sizes=\"auto, (max-width: 735px) 100vw, 735px\" \/><\/figure>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Comment est organis\u00e9 un m\u00e9lange ? Activit\u00e9 1 : Identification des constituants d&rsquo;un m\u00e9lange Comp\u00e9tences travaill\u00e9es\u00a0: Document 1 Graphique en camembert repr\u00e9sentant les diff\u00e9rentes proportions des gaz dans l&rsquo;atmosph\u00e8re Source : https:\/\/www.lelivrescolaire.fr\/page\/11040980 Document 2 :<a class=\"read-more\" href=\"https:\/\/www.evoluscience.fr\/index.php\/sixieme\/partie-4\/chapitre-2-les-melanges\/activite-1\/\">Continue reading<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":16119,"menu_order":1,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","_seopress_robots_follow":"","_seopress_robots_imageindex":"","_seopress_robots_snippet":"","_seopress_robots_primary_cat":"","_seopress_robots_breadcrumbs":"","_seopress_robots_freeze_modified_date":"","_seopress_robots_custom_modified_date":"","_seopress_robots_canonical":"","_seopress_social_fb_title":"","_seopress_social_fb_desc":"","_seopress_social_fb_img":"","_seopress_social_fb_img_attachment_id":0,"_seopress_social_fb_img_width":0,"_seopress_social_fb_img_height":0,"_seopress_social_twitter_title":"","_seopress_social_twitter_desc":"","_seopress_social_twitter_img":"","_seopress_social_twitter_img_attachment_id":0,"_seopress_social_twitter_img_width":0,"_seopress_social_twitter_img_height":0,"_seopress_redirections_value":"","_seopress_redirections_enabled":"","_seopress_redirections_enabled_regex":"","_seopress_redirections_logged_status":"","_seopress_redirections_param":"","_seopress_redirections_type":0,"_seopress_analysis_target_kw":"","_monsterinsights_skip_tracking":false,"_themeisle_gutenberg_block_has_review":false,"footnotes":""},"class_list":["post-16125","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.evoluscience.fr\/index.php\/wp-json\/wp\/v2\/pages\/16125","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.evoluscience.fr\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.evoluscience.fr\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.evoluscience.fr\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.evoluscience.fr\/index.php\/wp-json\/wp\/v2\/comments?post=16125"}],"version-history":[{"count":10,"href":"https:\/\/www.evoluscience.fr\/index.php\/wp-json\/wp\/v2\/pages\/16125\/revisions"}],"predecessor-version":[{"id":16662,"href":"https:\/\/www.evoluscience.fr\/index.php\/wp-json\/wp\/v2\/pages\/16125\/revisions\/16662"}],"up":[{"embeddable":true,"href":"https:\/\/www.evoluscience.fr\/index.php\/wp-json\/wp\/v2\/pages\/16119"}],"wp:attachment":[{"href":"https:\/\/www.evoluscience.fr\/index.php\/wp-json\/wp\/v2\/media?parent=16125"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}