{"id":2282,"date":"2026-10-01T10:05:36","date_gmt":"2026-10-01T10:05:36","guid":{"rendered":"https:\/\/smartcheli.org.np\/?p=2282"},"modified":"2026-10-01T10:06:59","modified_gmt":"2026-10-01T10:06:59","slug":"invisible-ink","status":"publish","type":"post","link":"https:\/\/smartcheli.org.np\/ne\/invisible-ink\/","title":{"rendered":"Invisible Ink"},"content":{"rendered":"
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Balloon powered car<\/h1><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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\u0917\u094d\u0930\u0947\u0921\u0939\u0930\u0942<\/p>\t\t\t\t

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\u0915\u0915\u094d\u0937\u093e \u096c-\u096e<\/p>\n\t\t\t\t<\/div>\n\t\t\t<\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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\u0935\u093f\u0937\u092f\u0939\u0930\u0942<\/p>\t\t\t\t

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Science & Technology, Engineering, Physics<\/p>\n\t\t\t\t<\/div>\n\t\t\t<\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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\u091f\u094d\u092f\u093e\u0917\u0939\u0930\u0942<\/p><\/div><\/div>\t\t\t\t<\/div>\n\t\t

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Chemistry<\/p><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t

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Indicators<\/p><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t

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pH<\/p><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t

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Acids & Bases<\/p><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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\u0905\u0935\u0932\u094b\u0915\u0928<\/h2>
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Students send a message nobody can see, using only baking soda solution, turmeric and paper. They predict what could make a hidden message appear, plan what to hide, then write with a cotton bud dipped in baking soda solution and let it dry until it disappears. When they brush turmeric solution over the paper, the message appears in reddish-brown. Along the way, they discover that turmeric is a natural pH indicator that changes color when it meets a base, a hands-on lesson in indicators and acids and bases.<\/p>\n\t\t\t\t<\/div>\n\t\t\t<\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\n

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    Balloon powered car Grades Grade 6-8 Subjects Science & Technology, Engineering, Physics Tags Chemistry Indicators pH Acids & Bases Download Overview Students send a message nobody can see, using only baking soda solution, turmeric and paper. They predict what could make a hidden message appear, plan what to hide, then write with a cotton bud […]<\/p>\n","protected":false},"author":2,"featured_media":2154,"comment_status":"open","ping_status":"open","sticky":false,"template":"elementor_header_footer","format":"standard","meta":{"pagelayer_contact_templates":[],"_pagelayer_content":"","postBodyCss":"","postBodyMargin":[],"postBodyPadding":[],"postBodyBackground":{"backgroundType":"classic","gradient":""},"footnotes":""},"categories":[13],"tags":[],"class_list":["post-2282","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-resource-students"],"_links":{"self":[{"href":"https:\/\/smartcheli.org.np\/ne\/wp-json\/wp\/v2\/posts\/2282","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/smartcheli.org.np\/ne\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/smartcheli.org.np\/ne\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/smartcheli.org.np\/ne\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/smartcheli.org.np\/ne\/wp-json\/wp\/v2\/comments?post=2282"}],"version-history":[{"count":4,"href":"https:\/\/smartcheli.org.np\/ne\/wp-json\/wp\/v2\/posts\/2282\/revisions"}],"predecessor-version":[{"id":2288,"href":"https:\/\/smartcheli.org.np\/ne\/wp-json\/wp\/v2\/posts\/2282\/revisions\/2288"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/smartcheli.org.np\/ne\/wp-json\/wp\/v2\/media\/2154"}],"wp:attachment":[{"href":"https:\/\/smartcheli.org.np\/ne\/wp-json\/wp\/v2\/media?parent=2282"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/smartcheli.org.np\/ne\/wp-json\/wp\/v2\/categories?post=2282"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/smartcheli.org.np\/ne\/wp-json\/wp\/v2\/tags?post=2282"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}