How big is a hot air balloon? What’s it made from? Join Ross of the Live Science Team as he discovers how hot air balloons are made, shows you how to make one at home & meets one of the first pioneers of hot air ballooning
All you need to measure the speed of light is a microwave, a ruler & a bar of chocolate! To show you how to do this quantum kitchen experiment, here’s Ross & Nerys in this week’s portion of tasty science.
Is seeing really believing? Optical illusions can play tricks with your mind, but Ross of the Live Science Team shows you how to use science to fool your eyes and your brain into turning two 2D images into a single 3-dimensional, stereoscopic gif: http://youtu.be/ycdpn1sxO3o
Lactose intolerance can make milk toxic to humans. Is it weird for wanting to drink the milk of other animals? Ross Exton of the Live Science Team visits University of Bristol’s Wyndhurst Farm to explore how cows have changed the course of human evolution.
Adding potassium iodide to hydrogen peroxide catalyzes it’s break-down into oxygen & water. Add in some washing-up liquid & you’ve got yourself some oxygen bubbles! The fun part is throwing these bubbles into a flame to watch them explode! Find out more about how to set bubbles on fire in this video: http://youtu.be/PGUOdGajTFQ
Did you have these glow in the dark stars on your bedroom ceiling as a child? Fluorescence is the emission of light by a substance that has absorbed light; causing the electrons of that substance to jump between ground and excited states. Quinine, found in tonic water, is also fluorescent. Don’t believe me? Next time you’re in a bar with a UV light, order a Gin & Tonic to see for yourself. These stars continue to emit light after the UV light has been switched off, meaning they glow in the dark - this is known as phosphorescence. Find out how you can use this material to make phosphorescent graffiti in this video: http://youtu.be/T2vxb9YsfMk
What’s the difference between toffee and fudge? What makes the bubbles in honeycomb? Sarah and David of the Live Science Team investigate the science of sweets as they show you how to make honeycomb treats in your kitchen at home: http://youtu.be/IQ4Q5lmJYYs
When a metal chloride solution, dissolved in alcohol, is sprayed through a flame, this is what happens. It’s called luminescence & the light is emitted when the electrons of the metal jump up and down between an excited & ground states. Since each metal atom has a unique number & arrangement of electrons, the colour of light emitted from that metal solution is unique. Ever watched fireworks? That’s luminescence. And some of the common compounds used to create the colours of fireworks can be seen in this demo. Want to know more, check out the source video investigating the science of what makes something glow in the dark: http://youtu.be/T2vxb9YsfMk