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There are 21 videos in this category and 0 videos in 0 subcategories.
Category Videos
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Not Right For WatchKnowLearn
Ages: 13 - 18
376 Views:
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We'd rather not think about it, but the process of how sewage is transformed back into drinkable water is one of the great, underappreciated marvels of modern life. But how does this happen? In our latest ChemMatters video, we're going to show you ho...w wastewater goes from polluted to pure. To get more acquainted with this process, we visited DC Water's Blue Plains Advanced Wastewater Treatment Plant, which treats a whopping 370 million gallons of sewage a day! (7:21)
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December 11, 2011 at 09:31 AM
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Not Right For WatchKnowLearn
Ages: 8 - 14
678 Views:
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So what is cotton candy? Watch as University of Wisconsin-Madison Professor of Food Engineering Richard Hartel explains how to spin piping-hot melted sugar into tasty threads, eventually cooling off and forming cotton candy. (1:55)
December 6, 2011 at 08:30 PM
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Not Right For WatchKnowLearn
Ages: 8 - 15
637 Views:
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Richard Hartel, Ph.D., professor of food engineering at the University of Wisconsin-Madison boils a mixture of sugar, water and corn syrup at temperatures over 300 degrees Fahrenheit to produce hard candy. The video demonstrates how the molten liquid... candy cools to form what from a technical standpoint actually is a glass. Unlike window glass made of silica, this tasty glass is made of sugar. (4:20)
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December 6, 2011 at 08:13 PM
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Not Right For WatchKnowLearn
Ages: 8 - 14
615 Views:
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Learn how insect repellent ingredients like DEET work to scare away those nasty mosquitoes. (1:00)
December 6, 2011 at 08:26 PM
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Not Right For WatchKnowLearn
Ages: 8 - 13
651 Views:
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Imagine spaceships the size of a birthday cake zooming through the solar system. They snap pictures of other planets and send the images back to scientists on Earth. Some work as communications satellites. They relay TV programs, text messages, telep...hone signals and the Internet. Some may even be spy satellites with cameras powerful enough to snap peoples photos from hundreds of miles up in the sky. Now, one scientist has made a discovery that may make that sci-fi vision come true. This is a great resource for science classroom. (3:50)
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December 4, 2011 at 09:01 AM
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Not Right For WatchKnowLearn
Ages: 8 - 14
669 Views:
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Richard Hartel, Ph.D., professor of food engineering at the University of Wisconsin-Madison explains how the sugar crystal structure of candy corn gives this Halloween favorite its' characteristic creamy texture. (1:14)
December 6, 2011 at 08:15 PM
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Not Right For WatchKnowLearn
Ages: 8 - 14
648 Views:
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In this video, students will find out that scientists are sniffing around for a way to develop an electronic nose. For almost 25 years, chemists and other scientists have tried to build a machine that can take a whiff of the air, food or other object...s and say whether the odor is nasty or nice. Such a machine could work in factories, and help tell whether food is fresh. An electronic nose also could sniff for harmful air pollutants. And unlike people, it could work 24 hours a day and 7 days a week without getting tired. This is a great resource for the science classroom. (2:57)
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December 4, 2011 at 08:54 AM
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Not Right For WatchKnowLearn
Ages: 8 - 15
615 Views:
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Researchers from Utah are whipping up an alternative to the screws, nails, and metal plates used today to repair bones. Instead of using metal hardware, they want to use glue. To do it, they're calling on Mother Nature, where they've found a tiny sea... creature that could help--the Sandcastle Worm. (3:34)
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December 6, 2011 at 07:45 PM
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Not Right For WatchKnowLearn
Ages: 8 - 14
615 Views:
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In this video, students will learn that researchers in China are reporting the development of miniature super-bouyant boats that float better than anything else out there. These boats float so well that an ordinary life preserver made from the same m...aterial might support a horse without sinking. (3:05)
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December 6, 2011 at 07:51 PM
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Not Right For WatchKnowLearn
Ages: 8 - 14
581 Views:
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In this video, students will find out what goes on inside of the bug-eating pitcher plant, Nepenthes Alata. This video gives great details and diagrams about this pitcher plant. This is a great resource for the science classroom. (3:15)
December 6, 2011 at 07:39 PM
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