{"id":52966,"date":"2025-09-23T06:58:22","date_gmt":"2025-09-22T21:58:22","guid":{"rendered":"https:\/\/phys-edu.net\/wp\/?p=52966"},"modified":"2025-09-23T07:01:45","modified_gmt":"2025-09-22T22:01:45","slug":"the-science-behind-glass-tears-experience-the-shocking-secret-of-the-dutch-tear","status":"publish","type":"post","link":"https:\/\/phys-edu.net\/wp\/?p=52966&lang=en","title":{"rendered":"The Science Behind Glass Tears! Experience the Shocking Secret of the \u2018Dutch Tear\u2019"},"content":{"rendered":"<p style=\"text-align: center;\"><span style=\"color: #339966;\"><strong>I&#8217;m Ken Kuwako, a science trainer, and for me, every day&#8217;s an experiment!<\/strong><\/span><\/p>\n<p data-sourcepos=\"3:1-3:163\">Today, I want to share a beautiful and bizarre experiment called Prince Rupert&#8217;s Drop that I did with my science club students. It&#8217;s truly fascinating how we can take a common material like glass and see it behave in ways that defy our imagination. Watching the molten glass fall into the water is like witnessing a work of art. But behind that beauty lies a dramatic story of phase changes and hidden internal stresses.<\/p>\n<p>The Impact and Beauty of Prince Rupert&#8217;s Drop: Unlocking the Mysteries of Glass<\/p>\n<p data-sourcepos=\"11:1-11:134\">When you heat a glass rod and drop it into water, it forms a teardrop-shaped piece of glass. This is what&#8217;s known as a Prince Rupert&#8217;s Drop. The magic of this experiment lies in the beauty of its formation and the unpredictable destruction that follows.<\/p>\n<p>What are Prince Rupert&#8217;s Drops? The Science of Glass<br \/>\n<iframe loading=\"lazy\" title=\"\u885d\u6483\u3068\u7f8e\u3057\u3055\uff01\u300c\u30aa\u30e9\u30f3\u30c0\u306e\u6d99\u300d\u3067\u30ac\u30e9\u30b9\u306e\u4e0d\u601d\u8b70\u306b\u8feb\u308b\" width=\"1140\" height=\"641\" src=\"https:\/\/www.youtube.com\/embed\/XelAf5KX6RE?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<p data-sourcepos=\"15:1-15:64\">Prince Rupert&#8217;s Drops are made by dropping molten glass into cold water. This process creates a glass structure with a very unique internal composition.<br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-49688 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/06\/2479bd51cd0ddee41727297b138f9cd6.jpg\" alt=\"\" width=\"315\" height=\"301\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/06\/2479bd51cd0ddee41727297b138f9cd6.jpg 632w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/06\/2479bd51cd0ddee41727297b138f9cd6-300x287.jpg 300w\" sizes=\"auto, (max-width: 315px) 100vw, 315px\" \/><\/p>\n<p data-sourcepos=\"15:1-15:64\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-49689 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/06\/b77b9ff2875e8890a79ff48484ae3646.jpg\" alt=\"\" width=\"301\" height=\"233\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/06\/b77b9ff2875e8890a79ff48484ae3646.jpg 760w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/06\/b77b9ff2875e8890a79ff48484ae3646-300x233.jpg 300w\" sizes=\"auto, (max-width: 301px) 100vw, 301px\" \/><\/p>\n<p data-sourcepos=\"17:1-17:161\">The mechanism is similar to a phenomenon known as &#8220;chilled marbles.&#8221; When the molten glass hits the water, the outer layer cools and solidifies rapidly. As the glass transitions from a liquid to a solid, its volume slightly decreases. Since the surface hardens first, the still-molten glass on the inside gets squeezed by the shrinking outer layer.<\/p>\n<p data-sourcepos=\"19:1-19:174\">Then, as the inner glass slowly cools and solidifies, it&#8217;s subjected to intense tensile stress from being stretched by the already hardened outer shell. As a result, the surface of the Prince Rupert&#8217;s Drop is under strong compressive stress, while the inside is under strong tensile stress. This unique balance of forces is the key to Prince Rupert&#8217;s Drop.<\/p>\n<p data-sourcepos=\"21:1-21:213\">Because of this internal stress, the bulb of the drop becomes incredibly tough. You can even hit it with a hammer, and it won&#8217;t break! But here&#8217;s the amazing part: if you use a pair of pliers to nick or break off just the very end of the &#8220;tail&#8221; of the glass teardrop, the entire thing will shatter into a fine powder in an instant. This is because the tiny fracture at the tip of the tail releases the immense internal tensile stress, causing a rapid chain reaction of destruction throughout the entire drop.<\/p>\n<p style=\"text-align: center;\" data-sourcepos=\"21:1-21:213\">Make sure you wear safety glasses and put the drop in a plastic bag before you try it! Just use a pair of pliers to snap off the tip through the bag, and the entire thing will break apart at once.<\/p>\n<p data-sourcepos=\"21:1-21:213\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-49801 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/06\/b3d426ffeb2c95678b83fd6c0ed49496.jpg\" alt=\"\" width=\"437\" height=\"425\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/06\/b3d426ffeb2c95678b83fd6c0ed49496.jpg 976w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/06\/b3d426ffeb2c95678b83fd6c0ed49496-300x292.jpg 300w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/06\/b3d426ffeb2c95678b83fd6c0ed49496-768x748.jpg 768w\" sizes=\"auto, (max-width: 437px) 100vw, 437px\" \/><\/p>\n<p data-sourcepos=\"21:1-21:213\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-49802 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/06\/39006969e79ea4470b59a57449ba2c4b.jpg\" alt=\"\" width=\"440\" height=\"394\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/06\/39006969e79ea4470b59a57449ba2c4b.jpg 1176w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/06\/39006969e79ea4470b59a57449ba2c4b-300x269.jpg 300w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/06\/39006969e79ea4470b59a57449ba2c4b-1024x918.jpg 1024w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/06\/39006969e79ea4470b59a57449ba2c4b-768x688.jpg 768w\" sizes=\"auto, (max-width: 440px) 100vw, 440px\" \/><\/p>\n<p data-sourcepos=\"21:1-21:213\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-49690 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/06\/dcee4dd16a9807ca91f13c10e2ea08c2.jpg\" alt=\"\" width=\"310\" height=\"250\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/06\/dcee4dd16a9807ca91f13c10e2ea08c2.jpg 790w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/06\/dcee4dd16a9807ca91f13c10e2ea08c2-300x242.jpg 300w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/06\/dcee4dd16a9807ca91f13c10e2ea08c2-768x620.jpg 768w\" sizes=\"auto, (max-width: 310px) 100vw, 310px\" \/><\/p>\n<p data-sourcepos=\"23:1-23:123\">Here are the websites I used for reference:<\/p>\n<p style=\"text-align: center;\">Can&#8217;t break it with a hammer?! Making an amazing piece of glass<\/p>\n<p style=\"text-align: center;\"><a href=\"https:\/\/www.mirai-kougaku.jp\/laboratory\/pages\/201016.php#:~:text=\u306f\u3058\u3081\u306b,\u307f\u3066\u306f\u3044\u304b\u304c\u3067\u3057\u3087\u3046\u304b%E3%80%82\">October 30, 2020 &#8211; Tsukuba University of Technology, School of Industrial Technology<\/a><\/p>\n<p>The Experiment: Our Science Club in Action!<\/p>\n<p data-sourcepos=\"27:1-27:25\">Our science club decided to take on this incredible experiment!<\/p>\n<p>What you&#8217;ll need<\/p>\n<ul data-sourcepos=\"31:1-39:0\">\n<li data-sourcepos=\"31:1-31:31\">Glass rod: A standard lab glass rod works perfectly.<\/li>\n<li data-sourcepos=\"32:1-32:43\">Torch burner (or gas burner): You&#8217;ll need high heat to melt the glass.<\/li>\n<li data-sourcepos=\"33:1-33:44\">Heat-resistant beaker or metal container: To hold the cold water where the glass drop will land.<\/li>\n<li data-sourcepos=\"34:1-34:19\">Cold water: Fill the beaker with plenty of it.<\/li>\n<li data-sourcepos=\"35:1-35:34\">Pliers: For breaking the tail of the drop you create.<\/li>\n<li data-sourcepos=\"36:1-36:47\">Safety glasses: You must wear these! Glass fragments can fly everywhere.<\/li>\n<li data-sourcepos=\"37:1-37:32\">Heat-resistant gloves: For safely holding the glass rod.<\/li>\n<li data-sourcepos=\"38:1-39:0\">Workstation: Make sure you have a stable surface.<\/li>\n<\/ul>\n<p>The Procedure<\/p>\n<ol data-sourcepos=\"42:1-58:0\">\n<li data-sourcepos=\"42:1-43:55\">Prep the water:\n<ul data-sourcepos=\"43:5-43:55\">\n<li data-sourcepos=\"43:5-43:55\">Fill a heat-resistant beaker or metal container with plenty of cold water.<\/li>\n<\/ul>\n<\/li>\n<li data-sourcepos=\"44:1-47:41\">Heat the glass rod:\n<ul data-sourcepos=\"45:5-47:41\">\n<li data-sourcepos=\"45:5-45:25\">Put on your safety glasses and heat-resistant gloves.<\/li>\n<li data-sourcepos=\"46:5-46:89\">Heat the tip of the glass rod with the torch burner flame. You&#8217;ll see the glass turn red and then start to melt and get soft. Keep heating until the glass forms a nice, round drop.<\/li>\n<li data-sourcepos=\"47:5-47:41\">Have your students watch from a safe distance and be very careful not to get burned!<\/li>\n<\/ul>\n<\/li>\n<li data-sourcepos=\"48:1-50:41\">Drop it in the water:\n<ul data-sourcepos=\"49:5-50:41\">\n<li data-sourcepos=\"49:5-49:108\">Once the glass has melted and a drop has formed, slowly lower the hot tip of the glass rod into the cold water, allowing the melted glass to fall off naturally like a &#8220;teardrop.&#8221; Don&#8217;t try to shake it off.<\/li>\n<li data-sourcepos=\"50:5-50:41\">The moment the glass hits the water, it&#8217;ll cool instantly and solidify into its teardrop shape.<\/li>\n<\/ul>\n<\/li>\n<li data-sourcepos=\"51:1-52:46\">Examine your drop:\n<ul data-sourcepos=\"52:5-52:46\">\n<li data-sourcepos=\"52:5-52:46\">Carefully take the Prince Rupert&#8217;s Drop out of the water and admire its unique shape and clarity. If you look at it through a polarizing filter, you&#8217;ll see amazing colors, which are evidence of the internal stress.<br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-49803\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/06\/1ae82b6a68561f8a886e3f1d8a061f45.jpg\" alt=\"\" width=\"540\" height=\"413\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/06\/1ae82b6a68561f8a886e3f1d8a061f45.jpg 1340w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/06\/1ae82b6a68561f8a886e3f1d8a061f45-300x229.jpg 300w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/06\/1ae82b6a68561f8a886e3f1d8a061f45-1024x783.jpg 1024w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/06\/1ae82b6a68561f8a886e3f1d8a061f45-768x587.jpg 768w\" sizes=\"auto, (max-width: 540px) 100vw, 540px\" \/><\/li>\n<\/ul>\n<\/li>\n<li data-sourcepos=\"53:1-58:0\">The shocking moment! The destruction experiment:\n<ul data-sourcepos=\"54:5-58:0\">\n<li data-sourcepos=\"54:5-54:29\">Make sure you are wearing your safety glasses and are in a safe area.<\/li>\n<li data-sourcepos=\"55:5-55:50\">Use pliers to grip and break the very tip of the &#8220;tail&#8221; of your drop.<\/li>\n<li data-sourcepos=\"56:5-56:81\">You&#8217;ll hear a &#8220;CRACK!&#8221; as the entire drop instantly shatters into dust. This dramatic destruction will surely get a reaction from your students!<\/li>\n<li data-sourcepos=\"57:5-58:0\">Since fragments can fly, be aware of your surroundings and make sure you&#8217;re in a place where it&#8217;s safe for them to scatter, or even better, perform the experiment inside a clear container.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<p>What Can We Learn from This Experiment?<\/p>\n<p data-sourcepos=\"61:1-61:51\">The Prince Rupert&#8217;s Drop experiment isn&#8217;t just cool to watch; it&#8217;s a great opportunity to learn about some important scientific principles:<\/p>\n<ul data-sourcepos=\"63:1-67:0\">\n<li data-sourcepos=\"63:1-63:47\">States of Matter: Observe glass change from a solid to a liquid and then back to a solid.<\/li>\n<li data-sourcepos=\"64:1-64:63\">Thermal Expansion and Contraction: Learn how the shrinking volume of a material as it cools creates the unique internal stress structure of the drop.<\/li>\n<li data-sourcepos=\"65:1-65:95\">Internal Stress and Fracture: Visually understand how accumulated internal stress can be released by an external force, leading to a spectacular fracture. This is a fundamental concept in material science.<\/li>\n<li data-sourcepos=\"66:1-67:0\">The Connection between a Material&#8217;s Properties and Its Structure: Realize that even the same material, glass, can have completely different physical properties (strength and brittleness) depending on how it&#8217;s processed.<\/li>\n<\/ul>\n<p>Contact and Requests<br \/>\nInterested in the wonders of science? I&#8217;m sharing fun, easy-to-do science experiments you can try at home, along with tips and tricks! Feel free to explore more on my site.<\/p>\n<p>About the author, Ken Kuwako: <a href=\"https:\/\/phys-edu.net\/wp\/?page_id=188\">Click here<\/a><\/p>\n<p>For requests (writing, lectures, workshops, TV supervision, etc.): <a href=\"https:\/\/phys-edu.net\/wp\/?page_id=188\">Click here<\/a><br \/>\n<span class=\"s2\">&#8211; I post updates on <a href=\"https:\/\/x.com\/kuwako\">X<\/a>!<\/span><\/p>\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><a href=\"https:\/\/www.youtube.com\/user\/kkuwako?sub_confirmation=1\">My science channel<\/a> has more experiment videos!<\/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 style=\"text-align: center;\"><strong>Explore<\/strong><\/h3>\r\n<ul>\r\n<li><a href=\"https:\/\/phys-edu.net\/wp\/?page_id=30764\">\u697d\u3057\u3044\u5b9f\u9a13<\/a>\u2026\u304a\u5b50\u3055\u3093\u3068\u4e00\u7dd2\u306b\u5922\u4e2d\u306b\u306a\u308c\u308b\u30a4\u30c1\u30aa\u30b7\u306e\u79d1\u5b66\u5b9f\u9a13\u3092\u591a\u6570\u7d39\u4ecb\u3057\u3066\u3044\u307e\u3059\u3002\u307e\u305f\u3001\u9ad8\u6821\u7269\u7406\u306e\u7406\u89e3\u3092\u6df1\u3081\u308b\u305f\u3081\u306e\u52d5\u753b\u6559\u6750\u3082\u7528\u610f\u3057\u307e\u3057\u305f\u3002<\/li>\r\n<li><a href=\"https:\/\/phys-edu.net\/wp\/?page_id=798\">\u7406\u79d1\u306e\u6559\u6750<\/a>\u2026 \u7406\u79d1\u6559\u5e2b\u3092\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\uff01\u6388\u696d\u306e\u8cea\u3092\u9ad8\u3081\u3001\u6e96\u5099\u3092\u52b9\u7387\u5316\u3059\u308b\u305f\u3081\u306e\u9078\u308a\u3059\u3050\u308a\u306e\u6559\u6750\u3092\u7d39\u4ecb\u3057\u3066\u3044\u307e\u3059\u3002<\/li>\r\n<li><a href=\"https:\/\/www.youtube.com\/c\/kkuwako\">Youtube<\/a>\u2026\u79d1\u5b66\u5b9f\u9a13\u7b49\u306e\u52d5\u753b\u3092\u914d\u4fe1\u3057\u3066\u3044\u307e\u3059\u3002<\/li>\r\n<li><a href=\"https:\/\/music.youtube.com\/playlist?list=PLoK4ZvKN9S2NgpYIochcQs0aL-vrRB_Qw\">\u79d1\u5b66\u30e9\u30b8\u30aa<\/a>\u00a0\u2026\u79d1\u5b66\u30c8\u30d4\u30c3\u30af\u3092\u307b\u307c\u6bce\u65e5\u914d\u4fe1\u4e2d\uff01AI\u6280\u8853\u3092\u99c6\u4f7f\u3057\u3066\u4f5c\u6210\u3057\u305f\u300c\u8033\u3067\u697d\u3057\u3080\u79d1\u5b66\u300d\u3092\u304a\u5c4a\u3051\u3057\u307e\u3059\u3002<\/li>\r\n<li><a href=\"http:\/\/phys-edu.net\/wp\/?page_id=20940\">\u8b1b\u6f14<\/a>\u00a0\u2026\u5168\u56fd\u5404\u5730\u3067\u5b9f\u9a13\u8b1b\u7fd2\u4f1a\u30fb\u30b5\u30a4\u30a8\u30f3\u30b9\u30b7\u30e7\u30fc\u7b49\u3092\u884c\u3063\u3066\u3044\u307e\u3059\u3002<\/li>\r\n<li><a 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&#8217;m Ken Kuwako, a science trainer, and for me, every day&#8217;s an experiment! Today, I want to share a [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":49687,"comment_status":"closed","ping_status":"open","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-52966","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\/06\/b7d92e6cb0e2adc9c150c85d9266ccc4.jpg","jetpack-related-posts":[{"id":54433,"url":"https:\/\/phys-edu.net\/wp\/?p=54433&lang=en","url_meta":{"origin":52966,"position":0},"title":"When It Fizzes\u2014A Peek into the Ancient Sea! Uncovering the Mystery of Rocks with Just a Drop of Acid (Limestone vs. Chert)","author":"\u6851\u5b50 \u7814","date":"2025\u5e7410\u670815\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\/2023\/01\/4684eb4b0c764280732d1aeeb2347fb5.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2023\/01\/4684eb4b0c764280732d1aeeb2347fb5.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2023\/01\/4684eb4b0c764280732d1aeeb2347fb5.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2023\/01\/4684eb4b0c764280732d1aeeb2347fb5.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":55848,"url":"https:\/\/phys-edu.net\/wp\/?p=55848&lang=en","url_meta":{"origin":52966,"position":1},"title":"Catch the Bending Light! 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Every Da\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\/06\/e6d88b8ba4709477e240017b28f76a34.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/06\/e6d88b8ba4709477e240017b28f76a34.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/06\/e6d88b8ba4709477e240017b28f76a34.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2025\/06\/e6d88b8ba4709477e240017b28f76a34.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":57338,"url":"https:\/\/phys-edu.net\/wp\/?p=57338&lang=en","url_meta":{"origin":52966,"position":2},"title":"Kitchen Science Magic! 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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\/2016\/01\/d4389e61f7eb454f103a2586262c7900.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":58618,"url":"https:\/\/phys-edu.net\/wp\/?p=58618&lang=en","url_meta":{"origin":52966,"position":4},"title":"The Kitchen Is a Laboratory! The Strange Drama of Water and Oil Caused by Hydrogen Bonds","author":"\u6851\u5b50 \u7814","date":"2026\u5e741\u67089\u65e5","format":false,"excerpt":"I\u2019m Ken Kuwako, your Science Trainer. 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Project an \u201cUpside-Down World\u201d on Your Wall \u2014 The Magic of Lenses and Light","author":"\u6851\u5b50 \u7814","date":"2025\u5e7411\u670814\u65e5","format":false,"excerpt":"I\u2019m 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":"\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8 2014-01-30 21.02.11","src":"https:\/\/i0.wp.com\/phys-edu.net\/wp\/wp-content\/uploads\/2014\/01\/20d7ef28c6cfe82391d850c34d96c8b21.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]}],"_links":{"self":[{"href":"https:\/\/phys-edu.net\/wp\/index.php?rest_route=\/wp\/v2\/posts\/52966","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/phys-edu.net\/wp\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/phys-edu.net\/wp\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/phys-edu.net\/wp\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/phys-edu.net\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=52966"}],"version-history":[{"count":0,"href":"https:\/\/phys-edu.net\/wp\/index.php?rest_route=\/wp\/v2\/posts\/52966\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/phys-edu.net\/wp\/index.php?rest_route=\/wp\/v2\/media\/49687"}],"wp:attachment":[{"href":"https:\/\/phys-edu.net\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=52966"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/phys-edu.net\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=52966"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/phys-edu.net\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=52966"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}