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A demonstration that the heat released by a chemical reaction is not related to how fast the reaction goes. Professor Burk compares two reactions that have similar changes in enthalpy but occur at very different rates (05:54).
Found by tyler.arnold in Kinetics
September 4, 2012 at 08:47 PM
Ages: 16 - 18
License: Public Domain
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Views: 2506 |
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ABSTRACT: Climate change has multiple direct and indirect consequences for human health. Heat waves affect health directly and are projected to take an increasing toll in developed and underdeveloped nations. The 2003 summer heatwave in Europe -- an event, six standard deviations from the mean -- led to 21-35,000 excess deaths in five nations, extensive wildfires, crop failures, nuclear plant shutdowns and melted 10% of the Alpine glacial mass. This event and Hurricane Katrina in 2005 demonstrate that climate change and its impacts may be surprisingly non-linear. (54:47) Speaker: Paul Epstein
Found by teresahopson in Causes of Global Warming
March 22, 2011 at 07:21 PM
Ages: 14 - 18
License: Proprietary
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How did a meeting intended to revise the Articles of Confederation lead to the new Constitution for the United States? Discover how a handful of men--sitting in sweltering heat and shrouded by secrecy--changed the course of history for America in 1787. (03:57)
Found by Rockefellerteacher in Constitutional History
December 27, 2012 at 01:57 PM
Ages: 13 - 18
License: Undetermined
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Telescopes are engineered to detect a specific range of wavelengths of electromagnetic radiation. Images from a variety of these telescopes show different aspects of the same astronomical objects. To trained eyes, each of the images in this collection produced for Teachers' Domain contributes details that provide a more comprehensive understanding of the observed object than is possible from a single image. Radio images highlight the presence of cooler gas clouds (especially hydrogen), infrared images show areas of low-energy heat, visible light images depict primarily gases and dust, and x-ray images reveal high-energy heat emissions.
Found by Mrs Jefferies in Visible Light
April 25, 2012 at 08:18 PM
Ages: 10 - 18
License: Proprietary
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Views: 2441 |
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From towers to dishes to linear mirrors to troughs, concentrating solar power (CSP) technologies reflect and collect solar heat to generate electricity. A single CSP plant can generate enough power for about 90,000 homes. This video explains what CSP is, how it works, and how systems like parabolic troughs produce renewable power.
Found by begamatt in Solar Power
November 20, 2011 at 08:13 PM
Ages: 8 - 13
License: Proprietary
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Views: 2428 |
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Reaction of iron with sulfur is initiated by heat and iron sulfide is formed. This is a great example of an exothermic reaciton and activation energy. There is also a really good guitar solo playing during the demonstration (01:46).
Found by tyler.arnold in Kinetics
September 11, 2012 at 07:27 PM
Ages: 16 - 18
License: Proprietary
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Views: 2425 |
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Join Award winning teachers Jonathan Bergmann and Aaron Sams as they interactively teach Chemistry. 6.6: Calorimetry .This video will teach students about calorimetry, the method that scientists use to measure heat energy. ( 7:38)
Found by michellehoggard in Temperature
January 30, 2012 at 06:41 PM
Ages: 15 - 18
License: Undetermined
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Views: 2423 |
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Learn how your microwave works in this So Cool Science Show video. The video discusses heat radiation and conduction. Microwave ovens produce electromagnetic radiation. Run time 03:45.
Found by begamatt in Thermodynamics
June 29, 2010 at 10:09 PM
Ages: 11 - 18
License: Proprietary
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Views: 2370 |
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This program explains how the principle of buoyancy is responsible for the process of heat transfer called convection. Eureka was a series of short cartoons on physics that ran on public television in the 1980's. The video explains the concept in simple and well illustrated way. Good for students of any elementary school level.
Found by Barb in Temperature
August 9, 2009 at 05:24 PM
Ages: 7 - 12
License: Proprietary
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Views: 2339 |
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On February 1, 2003, the space shuttle Columbia was 16 minutes away from touchdown after completing its 28th mission when a damaged heat protection tile caused the shuttle to incinerate, killing all seven crew members. Later that day, President George W. Bush informs the nation about the terrible disaster. (03:15)
Found by CourtneyMorrison in Bush Speeches
June 21, 2012 at 12:57 AM
Ages: 12 - 18
License: Proprietary
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Views: 2326 |
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We live in an energy-dependent world. When we start the engines of our cars or turn on the heat in our homes, we are using fossil fuels such as petroleum (crude oil), natural gas, or coal. As the fuel burns, cars move and our houses warm. The carbon compounds in the fuels break down and carbon dioxide is released. We also use a great deal of electricity – and the production of electricity also creates a great deal of carbon dioxide by much the same process. Each year, estimates show that all the things every American does produces almost 19 metric tons of carbon dioxide. That's about 41,900 pounds of carbon dioxide. Sixty years ago (in 1950), the total for every American was about 4 metric tons, or just under 9,000 pounds. What has changed? Find out by exploring the objects in each street scene. One scene shows a typical town in 1930. The other shows a town of today.
Found by Mrs Jefferies in Air Pollution
May 27, 2012 at 04:00 PM
Ages: 10 - 15
License: Public Domain
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Views: 2295 |
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In this interactive activity adapted from the University of Nebraska's Library of Crop Technologies, learn the basic steps of polymerase chain reaction (PCR), a technique used to produce short sections of DNA for analysis. In this technique, various components are combined in a microfuge tube and heated in a thermal cycler. The activity details the process, which results in thousands of identical copies of a DNA fragment. Note: The activity provides a simulation of the process. The characterizations of depicted components and their behaviors should not be taken literally.
Found by Mrs Jefferies in DNA
May 19, 2012 at 10:08 PM
Ages: 10 - 18
License: Public Domain
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Views: 2274 |
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Jupiter's weather doesn't come from the sun; it comes from deep within the planet, itself. This heat and the planet's incredible rotation speed create the mega storms on Jupiter's surface--including the great red spot. (02:18)
Found by teresahopson in Jupiter's Red Spot
June 16, 2017 at 05:46 PM
Ages: 9 - 18
License: Proprietary
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In this interactive activity adapted from the Exploratorium, learn how different ingredients and the application of heat influence how different types of candy are made. This activity presents a scientific definition of sugar, including an illustration of a sugar molecule; explains how candy makers prevent crystallization from ruining their creations; and addresses the question: Is sugar bad for your teeth? There are several short clips (0:10-0:15 each) that are combined in this interactive link along with written explanations.
Found by begamatt in Temperature
August 14, 2010 at 11:53 AM
Ages: 9 - 14
License: Undetermined
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This short video gives excellent real life footage of a mother American Black Bear and her two cubs living in their dens. Students can see close ups of the 2 cubs playing with each other and nursing on Mom. There is also a quick thermal imaging picture that shows hibernation heat loss patterns. This is a good resource to help build background knowledge and to help make real world connections between nature and the classroom. (Less Than 2 Minutes)
Found by porter1526 in Black Bears
December 22, 2011 at 08:25 AM
Ages: 6 - 14
License: Proprietary
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Duplication is the process of recording information onto blank discs, CD or DVD, often called burning. The process is often referred to as burning because a laser is used to heat a chemical dye in the disc and literally "burn" marks that will be read as data. Because this thin layer of chemical dye is inside the disc, it is important to use high quality blank discs to get good results. Large duplication towers that can burn many discs at once allow for speed and accuracy. Robotic duplicators will run unattended and are used to burn discs without the need for an operator to load and unload discs. Once the discs have been burned, they are moved to our special Photo Pro Printing process. PhotoPro is state-of-the-art disc printing that produces vibrant high quality results.
Found by Donna_Strobel in Disk Drives
May 31, 2010 at 10:30 AM
Ages: 11 - 18
License: Proprietary
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Rubber gets tough with the help of sulphur and heat. Learn about this process, known as vulcanization, in this clip from Discovery Channel's "HowStuffWorks" show. (02:10)
Found by alhood in Misc. Inventions
January 8, 2013 at 10:23 AM
Ages: 12 - 18
License: Undetermined
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The Expedition Blue Planet team explore the impacts of a broken river and disappearing wetlandsIn August 2010, Alexandra Cousteau’s Expedition Blue Planet crossed over the Arizona/Mexico border to follow the Colorado’s dry riverbed to its historic mouth in the Upper Gulf of California where its nutrient-rich waters no longer reach the sea.The stately Colorado, that same iconic river of history that carved out the Grand Canyon and made the deserts bloom in the American southwest, now ends in hypersaline mudflat rather than a punctuation mark of aquatic biodiversity. Our unsustainable demands and shortsighted management of the Colorado River literally exhaust its supply; its 1,450-mile long path now ends in the dust and shimmering heat of the Mexican desert.In Death of a River, Alexandra and her team join Ornithologist Dr. Osvel Hinojosa-Huerta and agriculture and water expert Dr. Yamillet Carrillo-Guerrero to explore the impacts of a broken river and disappearing wetlands. Our loss is not only calculated in the collapse of more than 2 million acres of wetland - a fertile delta the size of Rhode Island - but also the impoverishment of critical estuaries where the river once met the sea. (08:57)
Found by Mrs Jefferies in Blue Planet Series
September 10, 2011 at 11:04 PM
Ages: 12 - 18
License: Proprietary
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This is the 5th lesson in the series, "Physical and Chemical Change." This lesson describes the effect of heating malachite and copper in open systems, reviews the meanings of decomposition and synthesis, and demonstrates how to apply the law of constant composition. (15:24)
Found by begamatt in Physical and Chemical Change (Series)
April 10, 2011 at 09:59 AM
Ages: 12 - 18
License: Proprietary
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Scientists discover how huge blocks of volcanic rock can slide off a land mass into the ocean through heat and water pressure. (03:45)
Found by teresahopson in BBC Nature - Tsunami Series
February 27, 2010 at 04:33 PM
Ages: 12 - 18
License: Proprietary
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Views: 2638 |
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Although Beethoven had performed his 4th Piano Concerto privately, in 1807, the public did not hear it until the 22nd of December, 1808. On that night they also heard four hours of new music in a cold concert hall (the heating system had failed to work properly). After he personally played this concerto at the December 1808 concert, Beethoven never publicly performed with an orchestra again.
In this clip, we see Murray Perahia playing the last movement of Beethoven's 4th Piano Concerto with Sir Colin Davis conducting the New York Philharmonic. (9:09)
Perhaps because of those factors - or maybe because the 4th was so different from Beethoven's first three concertos for solo piano and orchestra - the work was never publicly performed again in Beethoven's lifetime
Found by Donna_Strobel in Beethoven's Piano Music
April 17, 2010 at 01:00 PM
Ages: 10 - 18
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A chemical demonstration showing that some reactions absorb heat. Two solids, barium hydroxide and ammonium nitrate, are mixed in a flask. The reaction is so endothermic that the flask freezes to a block of wood (03:05).
Found by tyler.arnold in Thermochemistry
September 4, 2012 at 08:06 PM
Ages: 16 - 18
License: Public Domain
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This five minute video discusses the impact of changing freshwater levels in the Arctic Ocean. Normally, a layer of colder freshwater resides above the warmer saltwater in the ocean, held in place by a circulation called the Beaufort Gyre and keeping the surface ice from melting. However, periodically, the Gyre weakens, releasing the cold freshwater south, possibly interfering with the warm Gulf Stream in the Atlantic and keeping it from releasing heat into the atmosphere.
This could potentially affect the climate of the entire Northern Hemisphere, causing it to cool. A map of the currents and areas would be a plus when using this video. Interesting sidebar on how Polar Bears deal with scientific equipment.
Found by freealan in Melting of Polar Ice Caps
August 19, 2011 at 08:24 PM
Ages: 7 - 18
License: Undetermined
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The distribution of rainfall on Earth follows clear patterns that can be traced to factors that influence cloud formation, such as the amount of solar heating, surface temperatures, topography, and proximity to moisture. In this visualization from NASA, observe the monthly distribution of global rainfall from January 1979 to January 2001, as illustrated by data gathered with a combination of remote-sensing and ground-based methods. (3mins)
Found by Mrs Jefferies in Rain
January 30, 2012 at 10:45 PM
Ages: 10 - 18
License: Proprietary
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Musical traditions and recollections of eight retired African-American railroad track laborers whose occupational folk songs were once heard on railroads that crisscross the South. "Gandy dancer" is a slang term used for early railroad workers who laid and maintained railroad tracks in the years before the work was done by machines. It appears that no one knows for certain where the term originated. A majority of early railway workers were Irish, so an Irish or Gaelic derivation for the English term seems possible. Some associate the word "gandy" with the sound of the Gaelic word "cinnte", which may be translated as "constant". Another possible meaning for the word cinnte, if this is the proper origin, is "certainty," i.e., the importance of the work to prevent trains from derailing, suggesting that the workers must do their "dance" in "constant rain or withering heat". (01:51)
Found by ECP in History of Railroads
January 15, 2012 at 10:02 PM
Ages: 9 - 18
License: Undetermined
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