{"version":"1.0","type":"rich","provider_name":"Acast","provider_url":"https://acast.com","height":250,"width":700,"html":"<iframe src=\"https://embed.acast.com/$/69be1b0c3bbfcfe8dba05019/6a4771cf18b6df39f0d9df35?\" frameBorder=\"0\" width=\"700\" height=\"250\"></iframe>","title":"What Is Dry Ice and Why Does It Make Fog?","description":"<p>It looks like magic. It makes spooky fog that pours down instead of floating up. And it never leaves a puddle. So what is dry ice actually doing?</p><p><br></p><p>Dr Matt Agnew unpacks the weird science of dry ice, what sublimation is, why the fog pours downward like a waterfall, and why dry ice behaves so completely differently from the ice in your freezer.</p><p><br></p><p>What you'll learn:</p><ul><li>Normal ice is frozen water... dry ice is frozen carbon dioxide, the gas we breathe out</li><li>Dry ice skips the liquid step entirely... straight from solid to gas with no puddle</li><li>Scientists call that process sublimation, one of the most interesting phase changes in science</li><li>The fog is mostly not carbon dioxide at all... it's water vapour from the surrounding air getting chilled so fast it becomes visible</li><li>Cold air and carbon dioxide are both heavier than regular warm air, so the fog pours downward like a fog waterfall</li><li>Dry ice is essentially a natural fog machine used in theatres, film sets and Halloween displays worldwide</li></ul><p><br></p><p>Key Science Ideas:</p><ul><li>Sublimation: When a solid skips the liquid stage and goes straight to gas</li><li>Carbon dioxide: The gas we breathe out, and what dry ice is made of</li><li>Water vapour: Invisible water in the air that becomes visible when it gets suddenly cold</li><li>Phase change: When matter moves between solid, liquid and gas states</li><li>Density: Why cold air and carbon dioxide both sink rather than rise</li></ul><p><br></p><p>Safety note: Dry ice is extremely cold and must only be handled by adults wearing insulated gloves. It should only be used in well ventilated spaces. This is a watch and learn episode.</p><p><br></p><p>Why Though? The show for little scientists who love asking big questions. Follow or subscribe so you never miss an episode.</p><p><br></p><p>Follow Dr Matt Agnew:&nbsp;</p><p>Instagram: <a href=\"https://open.acast.com/networks/68901a7af3a75290d478c53b/shows/69be1b0c3bbfcfe8dba05019/episodes/instagram.com/drmattagnew%C2%A0\" rel=\"noopener noreferrer\" target=\"_blank\">instagram.com/drmattagnew&nbsp;</a></p><p>TikTok: <a href=\"https://open.acast.com/networks/68901a7af3a75290d478c53b/shows/69be1b0c3bbfcfe8dba05019/episodes/tiktok.com/@drmattagnew%C2%A0\" rel=\"noopener noreferrer\" target=\"_blank\">tiktok.com/@drmattagnew&nbsp;</a></p><p>YouTube: <a href=\"https://open.acast.com/networks/68901a7af3a75290d478c53b/shows/69be1b0c3bbfcfe8dba05019/episodes/youtube.com/@whythoughpod%C2%A0\" rel=\"noopener noreferrer\" target=\"_blank\">youtube.com/@whythoughpod&nbsp;</a></p><p>Website: <a href=\"https://open.acast.com/networks/68901a7af3a75290d478c53b/shows/69be1b0c3bbfcfe8dba05019/episodes/www.drmattagnew.com\" rel=\"noopener noreferrer\" target=\"_blank\">drmattagnew.com</a></p><p><br></p><p>Find Why Though? podcast across the internet and share with your friends!</p><p>Instagram: <a href=\"https://www.instagram.com/whythoughpod\" rel=\"noopener noreferrer\" target=\"_blank\">instagram.com/whythoughpod</a></p><p>TikTok: <a href=\"http://www.tiktok.com/@whythoughpod\" rel=\"noopener noreferrer\" target=\"_blank\">tiktok.com/@whythoughpod</a></p><p>Facebook: <a href=\"https://www.facebook.com/whythoughpod\" rel=\"noopener noreferrer\" target=\"_blank\">facebook.com/whythoughpod</a></p><p><br></p><p><br></p>","author_name":"MIK and Dr Matt Agnew"}