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Ages: 9 - 16
4422 Views:
Solar Energy Concentrator
From YouTube, produced by ScienceOnline
This video demonstrates how solar energy can be focused with a curved mirror. Once focused this energy can be used to cook food, sterilize water even create electricity.  Includes an explanation of energy, power, joules, and watts. Examples of radian... [more]
December 6, 2009 at 07:34 PM
Not Right For WatchKnowLearn
Ages: 14 - 18
4799 Views:
Great Glands - Your Endocrine System: CrashCourse Biology #33
From YouTube, produced by crashcourse
Hank fills us in on the endocrine system - the system of glands which produce and secrete different types of hormones directly into the bloodstream to regulate the body's growth, metabolism, and sexual development, and function. (11:20)
September 22, 2012 at 09:59 AM
Not Right For WatchKnowLearn
Ages: 7 - 18
4913 Views:
Meteorologist Explains How Rain Forms
From YouTube, produced by KCRA TV
In this edition of "Ask Dirk," KCRA 3 WeatherPlus Meteorologist Dirk Verdoorn explains how rain forms. A 'water cycle' experiment is set up with a tea kettle and a metal plate. The viewer can see that evaporation changes to condensation, then changes... [more]
Found by teresahopson in Rain
July 1, 2010 at 06:11 PM
Not Right For WatchKnowLearn
Ages: 3 - 7
4558 Views:
Up, Down
From YouTube
In this video, a librarian sings a song called "Up, Down" which is well-suited to babies and young toddlers. (01:00)
August 19, 2009 at 04:18 PM
Not Right For WatchKnowLearn
Ages: 7 - 18
5517 Views:
Singapore's History
From YouTube, produced by Global Village Travel Guide
This 3:25 video provides good images and data about the history of this island/country. It does a good job of briefly telling the background to the city and does show some significant modern buildings. Not much depth, and is best when dealing with ea... [more]
November 20, 2011 at 11:22 AM
Not Right For WatchKnowLearn
Ages: 9 - 18
3569 Views:
Animal Winter Games: Whale Migration Marathon
From YouTube, produced by National Geographic
Every spring, a series of epic battles are fought in the waters off America's west coast. It's the season when killer whales hunt their largest prey — gray whales that are migrating up the coast. (03:41)
January 4, 2013 at 08:23 PM
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