{"id":60339,"date":"2026-02-10T05:27:53","date_gmt":"2026-02-09T20:27:53","guid":{"rendered":"https:\/\/phys-edu.net\/wp\/?p=60339"},"modified":"2026-02-10T05:27:53","modified_gmt":"2026-02-09T20:27:53","slug":"the-secret-of-fizzy-reactions-learn-chemical-changes-with-citric-acid-x-baking-soda-endothermic-reaction","status":"publish","type":"post","link":"https:\/\/phys-edu.net\/wp\/?p=60339&lang=en","title":{"rendered":"The Secret of Fizzy Reactions! Learn Chemical Changes with Citric Acid \u00d7 Baking Soda (Endothermic Reaction)"},"content":{"rendered":"<p style=\"text-align: center;\"><span style=\"color: #339966;\"><b>I am Ken Kuwako, your Science Trainer. Every day is an experiment.<\/b><\/span><\/p>\n<p style=\"text-align: center;\">\u3010<a href=\"https:\/\/phys-edu.net\/wp\/?p=51292&amp;lang=en\">Read this article in English<\/a>\u3011<\/p>\n<p>That refreshing &#8220;fizz&#8221; the moment a Ramune soda touches your tongue. Or the way a bath bomb vigorously releases bubbles as it dissolves in the tub. These are more than just everyday moments; they are dramatic <b>chemical reactions<\/b> unfolding right before your eyes.When people hear &#8220;science experiment,&#8221; they often imagine specialized chemicals or complex machinery. However, you can recreate this fascinating phenomenon and uncover its secrets using just &#8220;two white powders&#8221; found in your kitchen. Today, I will introduce a thrilling experiment where you can actually feel the change in temperature!<\/p>\n<h3>The Fizzy Chill: An Endothermic Adventure with Citric Acid and Baking Soda<\/h3>\n<p>Recently, my science club students rushed to me, shouting, &#8220;Mr. Kuwako, something amazing happened!&#8221; Inside their beaker, the moment they added water to two mixed powders, a fountain of white bubbles erupted like a living thing.The best parts of this experiment are its <b>simplicity<\/b> and <b>safety<\/b>. We use materials common in cleaning and cooking: citric acid and baking soda. Watching these familiar substances transform and move energy is enough to captivate both children and adults. Now, let\u2019s reveal the secrets behind this &#8220;magic.&#8221;<\/p>\n<h3>Materials and Procedure<\/h3>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-60304 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/05\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-02-09-4.53.18.jpeg\" alt=\"\" width=\"526\" height=\"391\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/05\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-02-09-4.53.18.jpeg 1288w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/05\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-02-09-4.53.18-300x223.jpeg 300w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/05\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-02-09-4.53.18-1024x762.jpeg 1024w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/05\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-02-09-4.53.18-768x571.jpeg 768w\" sizes=\"auto, (max-width: 526px) 100vw, 526px\" \/><b>\u25a0 What You Need<\/b><\/p>\n<ul>\n<li><b>Citric Acid<\/b> (Powder: available at pharmacies or 100-yen stores)\n<p style=\"text-align: center;\"><a href=\"https:\/\/amzn.to\/4oRKWUH\">Amazon: Citric Acid<\/a><\/p>\n<\/li>\n<li><b>Baking Soda<\/b> (Sodium Bicarbonate: NaHCO\u2083)\n<p style=\"text-align: center;\"><a href=\"https:\/\/amzn.to\/4mWWCDS\">Amazon: Baking Soda<\/a><\/p>\n<\/li>\n<li>Dropper (or spoon)<\/li>\n<li>Water<\/li>\n<li>Small beaker or paper cup<\/li>\n<\/ul>\n<p><b>\u25a0 Step-by-Step Instructions<\/b><\/p>\n<ol>\n<li>Place the baking soda and citric acid in a <b>1:1 ratio<\/b> on your palm or in a container. Both are white powders, but if you touch them, you will notice baking soda is smooth and silky, while citric acid is a bit more granular.Here is the baking soda\u2014it feels very smooth.<img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-60306\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/05\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-02-09-4.53.44.jpeg\" alt=\"\" width=\"310\" height=\"279\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/05\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-02-09-4.53.44.jpeg 852w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/05\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-02-09-4.53.44-300x270.jpeg 300w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/05\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-02-09-4.53.44-768x692.jpeg 768w\" sizes=\"auto, (max-width: 310px) 100vw, 310px\" \/>Here is the citric acid. It looks more angular.<img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-60307\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/05\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-02-09-4.53.50.jpeg\" alt=\"\" width=\"310\" height=\"307\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/05\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-02-09-4.53.50.jpeg 742w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/05\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-02-09-4.53.50-300x298.jpeg 300w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/05\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-02-09-4.53.50-150x150.jpeg 150w\" sizes=\"auto, (max-width: 310px) 100vw, 310px\" \/><\/li>\n<li>Use the dropper to add a few drops of water to the mixture.<\/li>\n<li>Observe the vigorous fizzing and pay close attention to the <b>change in temperature<\/b>.<\/li>\n<\/ol>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-60308 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/05\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-02-09-4.53.57.jpeg\" alt=\"\" width=\"390\" height=\"353\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/05\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-02-09-4.53.57.jpeg 924w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/05\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-02-09-4.53.57-300x271.jpeg 300w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/05\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-02-09-4.53.57-768x695.jpeg 768w\" sizes=\"auto, (max-width: 390px) 100vw, 390px\" \/><\/p>\n<p style=\"text-align: center;\">As it fizzes, you should feel the area you are touching grow noticeably <b>cold<\/b>.<\/p>\n<p><iframe loading=\"lazy\" title=\"\u3057\u3085\u308f\u3057\u3085\u308f\u53cd\u5fdc\u306e\u3072\u307f\u3064\uff01\u30af\u30a8\u30f3\u9178\u00d7\u91cd\u66f9\u3067\u697d\u3057\u304f\u5b66\u3076\u5316\u5b66\u5909\u5316\uff08\u5438\u71b1\u53cd\u5fdc\uff09\" width=\"1140\" height=\"641\" src=\"https:\/\/www.youtube.com\/embed\/slOinhPrQCs?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<h3>The Chemistry Behind the Magic<\/h3>\n<p>Why does adding water to simple powders create bubbles and a drop in temperature? Let&#8217;s take a peek into the microscopic world of molecules. First, citric acid ($C_6H_8O_7$) is an acidic substance. It is a &#8220;triprotic acid,&#8221; meaning it has three carboxyl groups ($\u2212COOH$) within its molecule.On the other hand, baking soda ($NaHCO_3$) acts as a base (alkaline).When baking soda dissolves in water, it first separates into sodium ions and bicarbonate ions. This process is called <b>ionization<\/b>.<\/p>\n<div data-path-to-node=\"5\">\n<div data-math=\"\\text{NaHCO}_3 \\rightarrow \\text{Na}^+ + \\text{HCO}_3^-\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-60170 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2026\/02\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-02-06-18.05.28.jpeg\" sizes=\"auto, (max-width: 306px) 100vw, 306px\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2026\/02\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-02-06-18.05.28.jpeg 470w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2026\/02\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-02-06-18.05.28-300x42.jpeg 300w\" alt=\"\" width=\"306\" height=\"43\" \/><\/div>\n<\/div>\n<p>Bicarbonate ions have a tendency to take hydrogen ions from water molecules. As a result, <b>hydroxide ions ($OH^\u2212$)<\/b> are created, making the solution alkaline.<\/p>\n<div data-path-to-node=\"8\">\n<div class=\"math-block\" data-math=\"\\text{HCO}_3^- + \\text{H}_2\\text{O} \\rightleftharpoons \\text{H}_2\\text{CO}_3 + \\text{OH}^-\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-60171 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2026\/02\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-02-06-18.02.06.jpeg\" sizes=\"auto, (max-width: 307px) 100vw, 307px\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2026\/02\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-02-06-18.02.06.jpeg 580w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2026\/02\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-02-06-18.02.06-300x35.jpeg 300w\" alt=\"\" width=\"307\" height=\"36\" \/><\/div>\n<\/div>\n<p>https:\/\/phys-edu.net\/wp\/?p=60167When citric acid (acid) and baking soda (base) meet, a <b>neutralization reaction<\/b> occurs. The bubbles produced are actually <b>carbon dioxide ($CO_2$)<\/b>\u2014the same stuff we exhale. The entire process can be summarized in this formula:<\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-60309\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/05\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-02-09-5.04.55.jpeg\" alt=\"\" width=\"611\" height=\"42\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/05\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-02-09-5.04.55.jpeg 1010w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/05\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-02-09-5.04.55-300x21.jpeg 300w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/05\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-02-09-5.04.55-768x53.jpeg 768w\" sizes=\"auto, (max-width: 611px) 100vw, 611px\" \/><\/p>\n<ul>\n<li><b>Sodium Citrate<\/b>: The &#8220;salt&#8221; produced by the neutralization.<\/li>\n<li><b>Water<\/b>: Water is generated during the reaction.<\/li>\n<li><b>Carbon Dioxide<\/b>: The source of that delightful &#8220;fizz.&#8221;<\/li>\n<\/ul>\n<p>The fizzing in your beaker is exactly the same process used to make carbonated drinks. Science is applied to our favorite foods and products every single day!<\/p>\n<h3>Why Does It Feel Cold? The Wonder of Endothermic Reactions<\/h3>\n<p>The most surprising part of this experiment is that the reaction <b>steals heat from its surroundings<\/b>.<img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-60308 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/05\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-02-09-4.53.57.jpeg\" alt=\"\" width=\"390\" height=\"353\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/05\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-02-09-4.53.57.jpeg 924w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/05\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-02-09-4.53.57-300x271.jpeg 300w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/05\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-02-09-4.53.57-768x695.jpeg 768w\" sizes=\"auto, (max-width: 390px) 100vw, 390px\" \/>In general, chemical reactions are either &#8220;exothermic&#8221; (releasing heat) or <b>&#8220;endothermic&#8221;<\/b> (absorbing heat). When citric acid and baking soda react to produce carbon dioxide, they absorb energy (heat) from the environment. This causes the temperature of your hand or the container to drop significantly.Just as melting ice absorbs heat to cool its surroundings, molecules also move heat when they rearrange their bonds. It is a fantastic way to physically feel the concept of &#8220;energy&#8221; that we teach in middle school science.<\/p>\n<h3>Inquiries and Requests<\/h3>\n<p>Bringing the wonders of science closer to you! I share easy-to-follow guides for fun experiments you can do at home. Feel free to explore!<\/p>\n<ul>\n<li>Learn more about the administrator, Ken Kuwako, <a href=\"https:\/\/phys-edu.net\/wp\/?page_id=37\">here<\/a>.<\/li>\n<li>For professional inquiries (writing, lectures, workshops, TV supervision, etc.), click <a href=\"https:\/\/phys-edu.net\/wp\/?page_id=188\">here<\/a>.<\/li>\n<li>Follow the latest updates on <a href=\"https:\/\/x.com\/kuwako\">X (formerly Twitter)<\/a>!<\/li>\n<\/ul>\n<p style=\"text-align: center;\"><a href=\"https:\/\/www.youtube.com\/user\/kkuwako\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-35048\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2020\/03\/3d9640dad7bc5538e76f92da1966ee19.jpg\" alt=\"\" width=\"30\" height=\"21\" \/><\/a>Check out my experiment videos on the <a href=\"https:\/\/www.youtube.com\/user\/kkuwako?sub_confirmation=1\">Science Material Channel<\/a>!<\/p>\n<h3>\uff15\u6708\u306e\u30a4\u30c1\u30aa\u30b7\u5b9f\u9a13\uff01<\/h3>\r\n<p>\u30ad\u30fc\u30f3\u3068\u51b7\u3048\u308b\u30c9\u30e9\u30a4\u30a2\u30a4\u30b9\uff01\u6c17\u6e29\u304c\u4e0a\u304c\u3063\u3066\u304f\u308b\u3053\u306e\u6642\u671f\u30fb\u30c9\u30e9\u30a4\u30a2\u30a4\u30b9\u3092\u4f7f\u3063\u305f\u6607\u83ef\u30fb\u51dd\u7d50\u30fb\u7b49\u901f\u5ea6\u76f4\u7dda\u904b\u52d5\u306e\u5b9f\u9a13\u306f\u3044\u304b\u304c\uff1f<\/p>\r\n<p><img class=\"alignnone wp-image-39516 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2022\/03\/0618612becc032a60bdda50090ccccbe.jpg\" sizes=\"auto, (max-width: 550px) 100vw, 550px\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2022\/03\/0618612becc032a60bdda50090ccccbe.jpg 1406w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2022\/03\/0618612becc032a60bdda50090ccccbe-300x168.jpg 300w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2022\/03\/0618612becc032a60bdda50090ccccbe-1024x572.jpg 1024w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2022\/03\/0618612becc032a60bdda50090ccccbe-768x429.jpg 768w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2022\/03\/0618612becc032a60bdda50090ccccbe-320x180.jpg 320w\" alt=\"\" width=\"453\" height=\"253\" \/><\/p>\r\n<p style=\"text-align: center;\"><a href=\"https:\/\/phys-edu.net\/wp\/?p=39513\">\u6db2\u4f53\u30bc\u30ed\uff01\u30c9\u30e9\u30a4\u30a2\u30a4\u30b9\u304c\u6d88\u3048\u308b\u307e\u3067\u306e\uff13\u6642\u9593\u3092\u79d1\u5b66\u3059\u308b\uff08\u6607\u83ef\u30fb\u51dd\u7d50\u30fb\u7b49\u901f\u5ea6\u76f4\u7dda\u904b\u52d5\uff09<\/a><\/p>\r\n<h3 style=\"text-align: left;\"><span style=\"font-size: medium;\"><b><strong>\u30c6\u30ec\u30d3\u756a\u7d44\u76e3\u4fee\u30fb\u30a4\u30d9\u30f3\u30c8\u7b49\u306e\u304a\u77e5\u3089\u305b<\/strong><\/b><\/span><\/h3>\r\n<ul>\r\n<li>4\u670830\u65e5\uff08\u6728\uff09\u300cTHE\u7a81\u7834\u30d5\u30a1\u30a4\u30eb\u300d\uff08\u65e5\u672c\u30c6\u30ec\u30d3\uff09\u306e<a href=\"https:\/\/phys-edu.net\/wp\/?p=62906\">\u79d1\u5b66\u76e3\u4fee\u3092\u62c5\u5f53\u3057\u307e\u3057\u305f<\/a>\u3002<\/li>\r\n<li>5\u67088\u65e5\uff08\u91d1\uff09<a href=\"https:\/\/phys-edu.net\/wp\/?p=62629\">\u7406\u79d1\u6559\u80b2\u30cb\u30e5\u30fc\u30b9<\/a>\u3092\u62c5\u5f53\u3057\u307e\u3057\u305f\u3002<\/li>\r\n<li>6\u670814\u65e5\uff08\u65e5\uff09\u3000\u5343\u8449\u5927\u5b66\u30a4\u30f3\u30b9\u30bf\u30ec\u30fc\u30b7\u30e7\u30f3\u300c\u63a2\u7a76\u300d\u306b\u3066\u8b1b\u5e2b\u3092\u52d9\u3081\u307e\u3059<\/li>\r\n<li>6\u670826\u65e5\uff08\u91d1\uff09\u3000\u5343\u8449\u5927\u5b66\u306e\u516c\u958b\u7814\u7a76\u4f1a\uff08\u4e2d\u5b66\u7406\u79d1\u306b\u3064\u3044\u3066\u6388\u696d\u516c\u958b\u4e88\u5b9a\uff09<\/li>\r\n<li>7\u670818\u65e5\uff08\u571f\uff09\u3000<a href=\"https:\/\/phys-edu.net\/wp\/?p=60018\">\u6559\u54e1\u5411\u3051\u5b9f\u9a13\u8b1b\u7fd2\u4f1a\u300c\u30ca\u30ea\u30ab\u30ab\u30b5\u30a4\u30a8\u30f3\u30b9\u30a2\u30ab\u30c7\u30df\u30fc\u300d\u306e\u8b1b\u5e2b\u3092\u3057\u307e\u3059<\/a>\u3002\u304a\u4f1a\u3044\u3057\u307e\u3057\u3087\u3046\u3002<\/li>\r\n<\/ul>\r\n<h3><b>\u66f8\u7c4d<strong>\u306e\u304a\u77e5\u3089\u305b<\/strong><\/b><\/h3>\r\n<ul>\r\n<li>\u300e\u5927\u4eba\u306e\u305f\u3081\u306e\u9ad8\u6821\u7269\u7406\u5fa9\u7fd2\u5e33\u300f\uff08\u8b1b\u8ac7\u793e\uff09\u2026\u4e00\u822c\u5411\u3051\u306b\u65e5\u5e38\u306e\u7269\u7406\u306b\u3064\u3044\u3066\u516c\u5f0f\u3092\u5143\u306b\u7d10\u89e3\u304d\u307e\u3057\u305f\u3002<a href=\"https:\/\/phys-edu.net\/wp\/?p=1827\">\u7279\u8a2d\u30b5\u30a4\u30c8<\/a>\u3067\u306f\u5b9f\u9a13\u3092\u591a\u6570\u7d39\u4ecb\u3057\u3066\u3044\u307e\u3059\u3002<strong>\u203b\u5897\u5237\u304c\u304b\u304b\u308a\uff16\u5237\u3068\u306a\u308a\u307e\u3057\u305f\uff082026\/02\/01\uff09<br \/><img class=\"alignnone wp-image-10940 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2013\/12\/0811159a99f69eeff1a357e3daed84e0-300x262.jpg\" sizes=\"(max-width: 220px) 100vw, 220px\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2013\/12\/0811159a99f69eeff1a357e3daed84e0-300x262.jpg 300w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2013\/12\/0811159a99f69eeff1a357e3daed84e0.jpg 311w\" alt=\"\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8 2014-07-05 0.43.51\" width=\"220\" height=\"192\" \/><br \/><\/strong><\/li>\r\n<li>\u300e\u304d\u3081\u308b!\u5171\u901a\u30c6\u30b9\u30c8 \u7269\u7406\u57fa\u790e \u6539\u8a02\u7248\u300f\uff08\u5b66\u7814\uff09\u2026\u3000\u9ad8\u6821\u7269\u7406\u306e\u53c2\u8003\u66f8\u3067\u3059\u3002\u30a4\u30e9\u30b9\u30c8\u3092\u591a\u304f\u3057\u3066\u30a4\u30e1\u30fc\u30b8\u304c\u6301\u3066\u308b\u3088\u3046\u306b\u63cf\u304d\u307e\u3057\u305f\u3002\u6388\u696d\u306b\u3064\u3044\u3066\u3044\u3051\u306a\u3044\u3001\u7269\u7406\u304c\u82e6\u624b\u3001\u305d\u3093\u306a\u751f\u5f92\u306b\u304a\u3059\u3059\u3081\u3067\u3059\u3002<a href=\"https:\/\/phys-edu.net\/wp\/?p=45322\">\u7279\u8a2d\u30b5\u30a4\u30c8<\/a>\u306f\u3053\u3061\u3089\u3002<br \/><img class=\"alignnone wp-image-45718 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/04\/dc1da64a8c8d1422062b4867c0607a1c.jpg\" sizes=\"(max-width: 184px) 100vw, 184px\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/04\/dc1da64a8c8d1422062b4867c0607a1c.jpg 756w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/04\/dc1da64a8c8d1422062b4867c0607a1c-300x269.jpg 300w\" alt=\"\" width=\"184\" height=\"165\" \/><\/li>\r\n<\/ul>\r\n<h3><span style=\"text-align: center;\">\u5404\u7a2eSNS\uff08\u66f4\u65b0\u60c5\u5831\u3092\u304a\u5c4a\u3051\uff01\uff09<\/span><\/h3>\r\n<p style=\"text-align: center;\"><a style=\"text-align: center;\" href=\"https:\/\/twitter.com\/kuwako\">X(Twitter)<\/a><span style=\"text-align: center;\">\uff0f<\/span><a style=\"text-align: center;\" href=\"https:\/\/www.instagram.com\/science_seeds\/\">instagram<\/a><span style=\"text-align: center;\">\uff0f<\/span><a style=\"text-align: center;\" href=\"https:\/\/www.facebook.com\/kuwakolab\/\">Facebook<\/a>\uff08\u65e5\u672c\u8a9e\uff09<\/p>\r\n<p style=\"text-align: center;\"><a style=\"text-align: center;\" href=\"https:\/\/bsky.app\/profile\/kagakunoneta.bsky.social\">BlueSky<\/a><span style=\"text-align: center;\">\uff0f<\/span><a style=\"text-align: center;\" href=\"https:\/\/www.threads.net\/@science_seeds?hl=ja\">Threads<\/a>\uff08\u82f1\u8a9e\uff09<\/p>\r\n<h3 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href=\"http:\/\/phys-edu.net\/wp\/?page_id=37\">About<\/a>\u00a0\u2026\u300c\u79d1\u5b66\u306e\u30cd\u30bf\u5e33\u300d\u306e\u30b3\u30f3\u30bb\u30d7\u30c8\u3084\u3001\u904b\u55b6\u8005\u3067\u3042\u308b\u6851\u5b50\u7814\u306e\u30d7\u30ed\u30d5\u30a3\u30fc\u30eb\u30fb\u60f3\u3044\u3092\u307e\u3068\u3081\u3066\u3044\u307e\u3059\u3002<\/li>\r\n<li><a href=\"https:\/\/phys-edu.net\/wp\/?page_id=188\">\u304a\u554f\u3044\u5408\u308f\u305b<\/a> \u2026\u5b9f\u9a13\u6559\u5ba4\u306e\u3054\u4f9d\u983c\u3001\u57f7\u7b46\u30fb\u8b1b\u6f14\u306e\u76f8\u8ac7\u3001\u79d1\u5b66\u76e3\u4fee\u7b49\u306f\u3053\u3061\u3089\u306e\u30d5\u30a9\u30fc\u30e0\u304b\u3089\u304a\u5bc4\u305b\u304f\u3060\u3055\u3044\u3002<\/li>\r\n<\/ul>\r\n","protected":false},"excerpt":{"rendered":"<p>I am Ken Kuwako, your Science Trainer. Every day is an experiment. \u3010Read this article in English\u3011 That refresh [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":60308,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_sitemap_exclude":false,"_sitemap_priority":"","_sitemap_frequency":"","sns_share_botton_hide":"","vkExUnit_sns_title":"","vkexunit_cta_each_option":"","_lightning_design_setting":{"layout":"default"},"footnotes":""},"categories":[781],"tags":[],"class_list":["post-60339","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-science-en"],"jetpack_featured_media_url":"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/05\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-02-09-4.53.57.jpeg","jetpack-related-posts":[{"id":51292,"url":"https:\/\/phys-edu.net\/wp\/?p=51292&lang=en","url_meta":{"origin":60339,"position":0},"title":"The Secret of the Fizz! Learn Chemistry with Citric Acid and Baking Soda (Endothermic Reaction)","author":"\u6851\u5b50 \u7814","date":"2025\u5e748\u670830\u65e5","format":false,"excerpt":"I'm Ken Kuwako, a science trainer. Every day is an\u2026","rel":"","context":"Science","block_context":{"text":"Science","link":"https:\/\/phys-edu.net\/wp\/?cat=781&lang=en"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2022\/04\/661cf2a4731f97ee031213fdbacbdce6.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2022\/04\/661cf2a4731f97ee031213fdbacbdce6.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2022\/04\/661cf2a4731f97ee031213fdbacbdce6.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2022\/04\/661cf2a4731f97ee031213fdbacbdce6.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2022\/04\/661cf2a4731f97ee031213fdbacbdce6.jpg?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":59172,"url":"https:\/\/phys-edu.net\/wp\/?p=59172&lang=en","url_meta":{"origin":60339,"position":1},"title":"From Pasta to Ramen!? The Delicious Chemistry Behind Baking Soda\u2019s Magic","author":"\u6851\u5b50 \u7814","date":"2026\u5e741\u670822\u65e5","format":false,"excerpt":"I'm Ken Kuwako, your Science Trainer. Every day is\u2026","rel":"","context":"Science","block_context":{"text":"Science","link":"https:\/\/phys-edu.net\/wp\/?cat=781&lang=en"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/02\/71f1938282a68d426392d7a68168c4bd.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/02\/71f1938282a68d426392d7a68168c4bd.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/02\/71f1938282a68d426392d7a68168c4bd.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/02\/71f1938282a68d426392d7a68168c4bd.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":52468,"url":"https:\/\/phys-edu.net\/wp\/?p=52468&lang=en","url_meta":{"origin":60339,"position":2},"title":"We Built a Volcano\u2014and It Was Explosively Fun! The Ultimate Experiment Recipe Using Plaster and Baking Soda!","author":"\u6851\u5b50 \u7814","date":"2025\u5e749\u670817\u65e5","format":false,"excerpt":"I'm Ken Kuwako, a science trainer. Every day is an\u2026","rel":"","context":"Science","block_context":{"text":"Science","link":"https:\/\/phys-edu.net\/wp\/?cat=781&lang=en"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2022\/10\/%E3%82%B9%E3%82%AF%E3%83%AA%E3%83%BC%E3%83%B3%E3%82%B7%E3%83%A7%E3%83%83%E3%83%88-2025-07-20-6.05.16.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2022\/10\/%E3%82%B9%E3%82%AF%E3%83%AA%E3%83%BC%E3%83%B3%E3%82%B7%E3%83%A7%E3%83%83%E3%83%88-2025-07-20-6.05.16.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2022\/10\/%E3%82%B9%E3%82%AF%E3%83%AA%E3%83%BC%E3%83%B3%E3%82%B7%E3%83%A7%E3%83%83%E3%83%88-2025-07-20-6.05.16.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2022\/10\/%E3%82%B9%E3%82%AF%E3%83%AA%E3%83%BC%E3%83%B3%E3%82%B7%E3%83%A7%E3%83%83%E3%83%88-2025-07-20-6.05.16.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":50956,"url":"https:\/\/phys-edu.net\/wp\/?p=50956&lang=en","url_meta":{"origin":60339,"position":3},"title":"Creating a Volcano Was a Blast! A Recipe for an Explosively Fun Experiment (A Volcano Model Made with Plaster and Baking Soda)","author":"\u6851\u5b50 \u7814","date":"2025\u5e748\u670818\u65e5","format":false,"excerpt":"Science class is always most exciting when you can\u2026","rel":"","context":"Science","block_context":{"text":"Science","link":"https:\/\/phys-edu.net\/wp\/?cat=781&lang=en"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2022\/10\/%E3%82%B9%E3%82%AF%E3%83%AA%E3%83%BC%E3%83%B3%E3%82%B7%E3%83%A7%E3%83%83%E3%83%88-2025-07-20-6.05.16.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2022\/10\/%E3%82%B9%E3%82%AF%E3%83%AA%E3%83%BC%E3%83%B3%E3%82%B7%E3%83%A7%E3%83%83%E3%83%88-2025-07-20-6.05.16.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2022\/10\/%E3%82%B9%E3%82%AF%E3%83%AA%E3%83%BC%E3%83%B3%E3%82%B7%E3%83%A7%E3%83%83%E3%83%88-2025-07-20-6.05.16.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2022\/10\/%E3%82%B9%E3%82%AF%E3%83%AA%E3%83%BC%E3%83%B3%E3%82%B7%E3%83%A7%E3%83%83%E3%83%88-2025-07-20-6.05.16.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":57605,"url":"https:\/\/phys-edu.net\/wp\/?p=57605&lang=en","url_meta":{"origin":60339,"position":4},"title":"DIY Fireworks at Home! Summon a Giant Snake with Sugar and Baking Soda \u2014 The Magic \u201cSnake Firework\u201d You Can Make in Your Kitchen","author":"\u6851\u5b50 \u7814","date":"2025\u5e7412\u670821\u65e5","format":false,"excerpt":"I'm Ken Kuwako, your Science Trainer. Every day is\u2026","rel":"","context":"Science","block_context":{"text":"Science","link":"https:\/\/phys-edu.net\/wp\/?cat=781&lang=en"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/07\/69a32b4ea93be63f15c5effbcd38b96a.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/07\/69a32b4ea93be63f15c5effbcd38b96a.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/07\/69a32b4ea93be63f15c5effbcd38b96a.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/07\/69a32b4ea93be63f15c5effbcd38b96a.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":51177,"url":"https:\/\/phys-edu.net\/wp\/?p=51177&lang=en","url_meta":{"origin":60339,"position":5},"title":"\u3010Homemade Fireworks\u3011Let&#8217;s Make a Snake Firework! A Living Thing?","author":"\u6851\u5b50 \u7814","date":"2025\u5e748\u670825\u65e5","format":false,"excerpt":"I'm Ken Kuwako, a science trainer. 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