{"id":1119,"date":"2015-12-31T01:22:03","date_gmt":"2015-12-30T14:22:03","guid":{"rendered":"http:\/\/gosciencekids.com\/?p=1119"},"modified":"2019-08-20T22:54:56","modified_gmt":"2019-08-20T12:54:56","slug":"fireworks-science-kids-oil-water-density","status":"publish","type":"post","link":"https:\/\/gosciencekids.com\/fireworks-science-kids-oil-water-density\/","title":{"rendered":"Fireworks in Oil &#038; Water | Density science project for kids"},"content":{"rendered":"<p style=\"text-align: center;\"><em><span style=\"font-size: small;\">How to make &#8216;fireworks in a jar&#8217; &#8211; cool science project for kids.<\/span><\/em><\/p>\n<p><img loading=\"lazy\" class=\"aligncenter size-full wp-image-3445\" src=\"https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Fireworks-in-a-jar-science-project-for-kids.jpg\" alt=\"Fireworks in a jar science project for kids\" width=\"600\" height=\"600\" srcset=\"https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Fireworks-in-a-jar-science-project-for-kids.jpg 600w, https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Fireworks-in-a-jar-science-project-for-kids-150x150.jpg 150w, https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Fireworks-in-a-jar-science-project-for-kids-300x300.jpg 300w, https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Fireworks-in-a-jar-science-project-for-kids-250x250.jpg 250w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/p>\n<p>New Years Eve is fast approaching, and in Sydney, that means lots of spectacular fireworks. So to help build excitement (and prepare for the sensory overload), the kids and I did this fun &#8216;fireworks in a jar&#8217; science experiment at home.<\/p>\n<p>I first saw this idea on <a href=\"http:\/\/www.kidspot.com.au\/things-to-do\/activities\/fireworks-in-a-jar-science-experiment\" target=\"_blank\" rel=\"noopener noreferrer\">Kidspot<\/a>, and it looked easy and fun, so I was surprised when our first four attempts failed! But we did succeed in the end, and at least now I can tell you what not to do. \ud83d\ude42<\/p>\n<p>Once you&#8217;ve got the hang of it, this is a fun science experiment that you can do again and again, using just <a href=\"https:\/\/gosciencekids.com\/science-with-household-items\/\">everyday items<\/a> you probably already have at home. (It could be a good one to have up your sleeve for those times when you&#8217;re stuck indoors&#8230;)<\/p>\n<p><!--more--><\/p>\n<p class=\"hide-in-excerpt\" style=\"text-align: right;\"><span style=\"font-size: small;\"><sup>*<\/sup>This post contains affiliate links to similar products used.<\/span><\/p>\n<h2>How to create &#8216;Fireworks&#8217; in oil &amp; water<\/h2>\n<div>\n<p><img loading=\"lazy\" class=\"aligncenter size-full wp-image-3440\" src=\"https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Ingredients-to-make-firworks-in-a-jar-science-project.jpg\" alt=\"Ingredients to make firworks in a jar science project\" width=\"400\" height=\"600\" srcset=\"https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Ingredients-to-make-firworks-in-a-jar-science-project.jpg 400w, https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Ingredients-to-make-firworks-in-a-jar-science-project-100x150.jpg 100w, https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Ingredients-to-make-firworks-in-a-jar-science-project-200x300.jpg 200w, https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Ingredients-to-make-firworks-in-a-jar-science-project-250x375.jpg 250w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/p>\n<p>You need:<\/p>\n<ul>\n<li><strong><a href=\"https:\/\/amzn.to\/2ZdeKOA\" target=\"_blank\" rel=\"nofollow noopener noreferrer\">Oil<\/a><\/strong> (we used light olive oil, but most light coloured cooking or household oils should work).<\/li>\n<li><strong><a href=\"https:\/\/amzn.to\/2TLBbt0\" target=\"_blank\" rel=\"nofollow noopener noreferrer\">Liquid food colour<\/a><\/strong> (with droppers)<\/li>\n<li><strong>Glass containers<\/strong> (we used novelty bottles and an reused jam jar)<strong><br \/>\n<\/strong><\/li>\n<li><strong>Small cups<\/strong><\/li>\n<li><strong>Fork<br \/>\n<\/strong><\/li>\n<li><strong>Warm water<\/strong><\/li>\n<\/ul>\n<\/div>\n<p><strong>1. Fill a glass container with warm water, leaving an inch or so at the top for oil to be added later.<\/strong><\/p>\n<p>I&#8217;m not 100% sure that warm water is necessary. I&#8217;ve heard reports that cold water works just fine, but we had too many failed attempts to muck around with varying this aspect. Maybe we&#8217;ll try experimenting with this next time&#8230;<\/p>\n<p><strong>2. Add oil to a small cup<\/strong><\/p>\n<p>We eye-balled few tablespoons of olive oil. Young kids can help pour, as there&#8217;s no need for exact quantities.<\/p>\n<p><img loading=\"lazy\" class=\"aligncenter size-full wp-image-3439\" src=\"https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Adding-oil-making-fireworks-science-project.jpg\" alt=\"Adding oil - making fireworks science project\" width=\"400\" height=\"600\" srcset=\"https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Adding-oil-making-fireworks-science-project.jpg 400w, https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Adding-oil-making-fireworks-science-project-100x150.jpg 100w, https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Adding-oil-making-fireworks-science-project-200x300.jpg 200w, https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Adding-oil-making-fireworks-science-project-250x375.jpg 250w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/p>\n<p><strong>3. Add a few drops of food colouring to the oil.<\/strong><\/p>\n<p>With the food colouring, we found that less is more. Too much food colouring, and it tended to colour the water before the fireworks effect had begun. We had the best results when we used 2 drops of food colouring per colour, with about 2-3 colours each time. We tried several colour combinations, including green and gold (yellow) as these are Australia&#8217;s sporting colours. If you&#8217;re from the US, I think red and blue would also look great as &#8216;fireworks&#8217; for the 4th July.<\/p>\n<p><img loading=\"lazy\" class=\"aligncenter size-full wp-image-3438\" src=\"https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Adding-food-colouring-to-the-oil.jpg\" alt=\"Adding food colouring to the oil\" width=\"400\" height=\"600\" srcset=\"https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Adding-food-colouring-to-the-oil.jpg 400w, https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Adding-food-colouring-to-the-oil-100x150.jpg 100w, https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Adding-food-colouring-to-the-oil-200x300.jpg 200w, https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Adding-food-colouring-to-the-oil-250x375.jpg 250w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/p>\n<p><strong>4. Use the fork to stir the oil and food colouring together.<\/strong><\/p>\n<p>The food colouring and oil won&#8217;t mix, but stirring helps to break up the food colouring into smaller droplets, and also ensures that the food colouring is thoroughly coated with the oil. (Try not to overdo it though, or your fireworks display won&#8217;t be as impressive.)<\/p>\n<p><img loading=\"lazy\" class=\"aligncenter size-full wp-image-3437\" src=\"https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Stir-the-food-colouring-and-oil-with-a-fork.jpg\" alt=\"Stir the food colouring and oil with a fork\" width=\"600\" height=\"400\" srcset=\"https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Stir-the-food-colouring-and-oil-with-a-fork.jpg 600w, https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Stir-the-food-colouring-and-oil-with-a-fork-150x100.jpg 150w, https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Stir-the-food-colouring-and-oil-with-a-fork-300x200.jpg 300w, https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Stir-the-food-colouring-and-oil-with-a-fork-250x167.jpg 250w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/p>\n<p><strong>4. Gently pour in the oil so that it layers on top of the water, with the food colouring droplets suspended within the oil.<\/strong><\/p>\n<p>This is the section where we had been coming undone. Whenever we poured the oil in too quickly, it would stain the water before the experiment had begun (especially when we were too generous with our food colouring quantities). Through trial and error, we discovered it was better to add the oil slowly and gently, so that it layered on top of the water with the food colouring suspended in the oil.<\/p>\n<p><img loading=\"lazy\" class=\"aligncenter size-full wp-image-3433\" src=\"https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Layering-the-oil-on-top-of-the-water-1.jpg\" alt=\"Layering the oil on top of the water\" width=\"400\" height=\"600\" srcset=\"https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Layering-the-oil-on-top-of-the-water-1.jpg 400w, https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Layering-the-oil-on-top-of-the-water-1-100x150.jpg 100w, https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Layering-the-oil-on-top-of-the-water-1-200x300.jpg 200w, https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Layering-the-oil-on-top-of-the-water-1-250x375.jpg 250w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/p>\n<p><strong>5. Watch your &#8216;fireworks&#8217; science display!<\/strong><\/p>\n<p>The droplets of food colouring will start to drop and swirl though the water, creating a really colourful display that looks like it&#8217;s dancing!<\/p>\n<p><img loading=\"lazy\" class=\"aligncenter size-full wp-image-3441\" src=\"https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Watching-the-fireworks-appear.jpg\" alt=\"Watching the fireworks appear\" width=\"600\" height=\"503\" srcset=\"https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Watching-the-fireworks-appear.jpg 600w, https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Watching-the-fireworks-appear-150x126.jpg 150w, https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Watching-the-fireworks-appear-300x252.jpg 300w, https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Watching-the-fireworks-appear-250x210.jpg 250w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/p>\n<p><img loading=\"lazy\" class=\"aligncenter size-full wp-image-3434\" src=\"https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Fireworks-in-a-bottle-1.jpg\" alt=\"Fireworks in a bottle\" width=\"396\" height=\"596\" srcset=\"https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Fireworks-in-a-bottle-1.jpg 396w, https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Fireworks-in-a-bottle-1-100x150.jpg 100w, https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Fireworks-in-a-bottle-1-199x300.jpg 199w, https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Fireworks-in-a-bottle-1-250x376.jpg 250w\" sizes=\"(max-width: 396px) 100vw, 396px\" \/><\/p>\n<p><img loading=\"lazy\" class=\"aligncenter size-full wp-image-3443\" src=\"https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Swirling-fireworks-in-a-jar-science-project.jpg\" alt=\"Swirling fireworks in a jar science project\" width=\"600\" height=\"600\" srcset=\"https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Swirling-fireworks-in-a-jar-science-project.jpg 600w, https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Swirling-fireworks-in-a-jar-science-project-150x150.jpg 150w, https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Swirling-fireworks-in-a-jar-science-project-300x300.jpg 300w, https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Swirling-fireworks-in-a-jar-science-project-250x250.jpg 250w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/p>\n<p><img loading=\"lazy\" class=\"aligncenter size-full wp-image-3435\" src=\"https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/How-to-make-fireworks-in-water-1.jpg\" alt=\"How to make 'fireworks' in water\" width=\"400\" height=\"571\" srcset=\"https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/How-to-make-fireworks-in-water-1.jpg 400w, https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/How-to-make-fireworks-in-water-1-105x150.jpg 105w, https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/How-to-make-fireworks-in-water-1-210x300.jpg 210w, https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/How-to-make-fireworks-in-water-1-250x357.jpg 250w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/p>\n<p><img loading=\"lazy\" class=\"aligncenter size-full wp-image-3444\" src=\"https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Green-and-yellow-swirls-fireworks-in-a-jar-science-project-for-kids.jpg\" alt=\"Green and yellow swirls - fireworks in a jar science project for kids\" width=\"600\" height=\"600\" srcset=\"https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Green-and-yellow-swirls-fireworks-in-a-jar-science-project-for-kids.jpg 600w, https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Green-and-yellow-swirls-fireworks-in-a-jar-science-project-for-kids-150x150.jpg 150w, https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Green-and-yellow-swirls-fireworks-in-a-jar-science-project-for-kids-300x300.jpg 300w, https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Green-and-yellow-swirls-fireworks-in-a-jar-science-project-for-kids-250x250.jpg 250w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/p>\n<p><img loading=\"lazy\" class=\"aligncenter size-full wp-image-3436\" src=\"https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Fireworks-in-a-jar-density-science-experiment-kids-can-do-at-home.jpg\" alt=\"Fireworks in a jar - density science experiment kids can do at home\" width=\"400\" height=\"600\" srcset=\"https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Fireworks-in-a-jar-density-science-experiment-kids-can-do-at-home.jpg 400w, https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Fireworks-in-a-jar-density-science-experiment-kids-can-do-at-home-100x150.jpg 100w, https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Fireworks-in-a-jar-density-science-experiment-kids-can-do-at-home-200x300.jpg 200w, https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/Fireworks-in-a-jar-density-science-experiment-kids-can-do-at-home-250x375.jpg 250w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/p>\n<div class=\"info-box\">\n<h3 class=\"fun-fact\">What&#8217;s going on here?<\/h3>\n<p>This experiment is all about density. Density is a measure of how much something weighs (it&#8217;s mass) by how much space it takes up (it&#8217;s volume).<\/p>\n<p>Oil and water don&#8217;t mix (because the water molecules are more attracted to each other than the oil). Oil is also less dense than water, which causes the oil to float on top of the water, creating two distinct layers.<\/p>\n<p>Liquid food colouring is water-based, which is why it doesn&#8217;t mix with the oil even when you stir it. Instead the food colouring breaks up into small droplets which become temporarily suspended (floating) within the oil. These droplets are denser than the oil (due to their water content), and so they gradually fall though the oil and enter the water. Some residual oil remains on the food colouring droplets as they enter the water, which slows the absorption of the colour, creating long trails that resemble fireworks.<\/p>\n<\/div>\n<p><img loading=\"lazy\" class=\"aligncenter size-full wp-image-3447\" src=\"https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/How-to-create-fireworks-in-a-bottle-or-jar-fun-density-science-project-for-kids.jpg\" alt=\"How to create fireworks in a bottle or jar - fun density science project for kids\" width=\"600\" height=\"1068\" srcset=\"https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/How-to-create-fireworks-in-a-bottle-or-jar-fun-density-science-project-for-kids.jpg 600w, https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/How-to-create-fireworks-in-a-bottle-or-jar-fun-density-science-project-for-kids-84x150.jpg 84w, https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/How-to-create-fireworks-in-a-bottle-or-jar-fun-density-science-project-for-kids-169x300.jpg 169w, https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/How-to-create-fireworks-in-a-bottle-or-jar-fun-density-science-project-for-kids-506x900.jpg 506w, https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/How-to-create-fireworks-in-a-bottle-or-jar-fun-density-science-project-for-kids-250x445.jpg 250w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/p>\n<p>You could try experimenting with warm and cold water, or with different types of oils, and see if this makes a difference. I&#8217;d love to hear your results if you do!<\/p>\n<p>PS: In case you&#8217;re curious, here is an out-take from one of our earlier failed attempts. See how the water stained immediately because we were pouring too vigorously \/ from too great a height?<\/p>\n<p><img loading=\"lazy\" class=\"aligncenter size-full wp-image-3442\" src=\"https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/What-happens-when-you-add-the-oil-too-quickly.jpg\" alt=\"What happens when you add the oil too quickly\" width=\"600\" height=\"400\" srcset=\"https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/What-happens-when-you-add-the-oil-too-quickly.jpg 600w, https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/What-happens-when-you-add-the-oil-too-quickly-150x100.jpg 150w, https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/What-happens-when-you-add-the-oil-too-quickly-300x200.jpg 300w, https:\/\/gosciencekids.com\/wp-content\/uploads\/2015\/12\/What-happens-when-you-add-the-oil-too-quickly-250x167.jpg 250w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/p>\n<p>(And we even had a control sample, with our bottles all prettily labelled and everything. *sigh*)<\/p>\n<p><span style=\"font-size: small;\"><sup>*<\/sup> This post contains affiliate link(s) to similar products used. An affiliate link means I may earn advertising \/ referral fees if you make a purchase through my link <em><strong>without any extra cost to you<\/strong><\/em>. It helps to keep this little blog afloat. Thank you for your support.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>How to make &#8216;fireworks in a jar&#8217; &#8211; cool science project for kids. New Years Eve is fast approaching, and in Sydney, that means lots of spectacular fireworks. So to help build excitement (and prepare for the sensory overload), the kids and I did this fun &#8216;fireworks in a jar&#8217; science experiment at home. I &hellip; <\/p>\n","protected":false},"author":1,"featured_media":3436,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[33,7,8,4,34,43,41],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v15.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Fireworks in Oil &amp; Water | Density science project for kids &ndash; Go Science Kids<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/gosciencekids.com\/fireworks-science-kids-oil-water-density\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Fireworks in Oil &amp; Water | Density science project for kids &ndash; Go Science Kids\" \/>\n<meta property=\"og:description\" content=\"How to make &#8216;fireworks in a jar&#8217; &#8211; cool science project for kids. New Years Eve is fast approaching, and in Sydney, that means lots of spectacular fireworks. So to help build excitement (and prepare for the sensory overload), the kids and I did this fun &#8216;fireworks in a jar&#8217; science experiment at home. 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