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AC / DC: What's the Difference?
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This animated essay from the American Experience Web site explains the difference between alternating and direct electric current and offers in-depth explanations about the role played by a battery, light bulb, wire, and generator. Grades 6-12.

Subject:
Chemistry
Engineering
Physics
Material Type:
Activity/Lab
Interactive
Provider:
PBS LearningMedia
Author:
National Science Foundation
WGBH Educational Foundation
Date Added:
01/22/2004
Above the Clouds: Telescopes on Mauna Kea
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This video segment adapted from First Light explains why the highest peak in the Pacific, Mauna Kea, is an ideal site for astronomical observations. Featured are new telescope technologies that allow astronomers to explore the universe in more depth.

Subject:
Chemistry
Earth and Space Science
Physics
Material Type:
Activity/Lab
Diagram/Illustration
Provider:
PBS LearningMedia
University Corporation for Atmospheric Research
Author:
National Science Foundation
WGBH Educational Foundation
Date Added:
12/17/2005
Accidental Discoveries
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This segment from Swift: Eyes through Time traces the history military officers and engineers discovering a strange phenomenon in the sky that astronomers now know are gamma-ray bursts.

Subject:
Chemistry
Earth and Space Science
Physics
Material Type:
Lecture
Provider:
PBS LearningMedia
WPSU
Author:
NASA
PA Space Grant
WPSU
Date Added:
11/30/2007
Acids and Bases: Making a Film Canister Rocket
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In this video segment adapted from ZOOM, two cast members demonstrate what happens when vinegar is added to baking soda inside a container. The resulting chemical reaction produces enough carbon dioxide to launch their paper rocket skyward.
Recommended for: Grades K-5

Subject:
Chemistry
Physics
Material Type:
Activity/Lab
Provider:
PBS LearningMedia
Author:
National Science Foundation
WGBH Educational Foundation
Date Added:
02/20/2004
Acids and Bases: Testing Rocket Cars
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A car propelled by the reaction between lemon juice and baking soda has more in common with rockets and jet aircraft than one might think. In this video segment adapted from ZOOM, two cast members demonstrate the power of rocket-propelled vehicles and how to exploit the force produced by the carbon dioxide gas. Grades 3-8.

Subject:
Chemistry
Physics
Material Type:
Activity/Lab
Provider:
PBS LearningMedia
Author:
National Science Foundation
WGBH Educational Foundation
Date Added:
02/20/2004
Acids and Bases: Testing Rockets
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Educational Use
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It would seem that bottles of lemon juice and rockets have only their basic shape in common. However, as two cast members from ZOOM demonstrate in this adapted video segment, when baking soda is added to the mix, a plastic bottle can act very much like a real rocket. Grades 3-8.

Subject:
Chemistry
Physics
Material Type:
Activity/Lab
Provider:
PBS LearningMedia
Author:
National Science Foundation
WGBH Educational Foundation
Date Added:
02/20/2004
Air Is Matter
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Educational Use
Rating

This collection of still images presents different ways to visualize air, from billowing sails to windblown hair to tornadoes.

Subject:
Chemistry
Earth and Space Science
Physics
Material Type:
Activity/Lab
Diagram/Illustration
Provider:
PBS LearningMedia
University Corporation for Atmospheric Research
Author:
National Science Foundation
WGBH Educational Foundation
Date Added:
02/20/2004
Air Power: Making a Hovercraft
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Educational Use
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In this video segment adapted from ZOOM, cast members make their own hovercraft and demonstrate how the air leaking out of a balloon can make a plastic plate hover above a table.

Subject:
Chemistry
Engineering
Physics
Material Type:
Activity/Lab
Provider:
PBS LearningMedia
Author:
National Science Foundation
WGBH Educational Foundation
Date Added:
01/22/2004
Airplanes: Designing for Stealth
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Educational Use
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Explore this NOVA interactive activity to see how engineers have modified a military plane's sound, shape, and heat emissions to minimize detection.

Subject:
Chemistry
Engineering
Physics
Material Type:
Activity/Lab
Interactive
Provider:
PBS LearningMedia
Author:
National Science Foundation
WGBH Educational Foundation
Date Added:
01/22/2004
All Planet Sizes
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This illustration from the Lunar and Planetary Laboratory shows the approximate sizes of the planets relative to each other. Note that the planets are not shown at appropriate distances from the Sun.

Subject:
Chemistry
Earth and Space Science
Physics
Material Type:
Diagram/Illustration
Reading
Provider:
PBS LearningMedia
University Corporation for Atmospheric Research
Author:
National Science Foundation
WGBH Educational Foundation
Date Added:
12/17/2005
Amplitude
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This interactive activity adapted from the University of Utah's ASPIRE Lab shows how a pendulum's amplitude changes as you set it swinging from different distances from its axis, and how the amplitude of a sound wave changes as you adjust the volume.

Subject:
Chemistry
Physics
Material Type:
Activity/Lab
Interactive
Provider:
PBS LearningMedia
Author:
National Science Foundation
WGBH Educational Foundation
Date Added:
08/09/2007
Anatomy of a Rover
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In this interactive activity from NOVA, learn about the sophisticated scientific instruments on two identical robotic rovers that have explored Mars Spirit and Opportunity.

Subject:
Chemistry
Earth and Space Science
Engineering
Physics
Material Type:
Activity/Lab
Diagram/Illustration
Interactive
Provider:
PBS LearningMedia
University Corporation for Atmospheric Research
Author:
Argosy Foundation
WGBH Educational Foundation
Date Added:
05/09/2006
Anatomy of a Tsunami
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Tsunami waves can be distinguished from ordinary ocean waves by many factors, including the tremendous amount of energy they carry, the great distance between their wave crests, and their capacity to travel at jetliner speeds across an entire ocean. In this interactive from NOVA Online, explore how the 2004 Indian Ocean tsunami -- the deadliest in recorded history -- was triggered, how its waves traveled thousands of kilometers largely unchanged, and what happened once the waves reached coastlines both near and far from their source. Grades 6-12

Subject:
Chemistry
Earth and Space Science
Environmental Science
Physics
Material Type:
Activity/Lab
Diagram/Illustration
Interactive
Provider:
PBS LearningMedia
University Corporation for Atmospheric Research
Author:
National Science Foundation
WGBH Educational Foundation
Date Added:
10/21/2005
Anatomy of a Volcano
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In this interactive activity from NOVA Online, explore the main features of the Nyiragongo volcano, located in the Democratic Republic of Congo, and learn what risks it poses to the 500,000 people who live in its shadow.

Subject:
Chemistry
Earth and Space Science
Physics
Material Type:
Activity/Lab
Diagram/Illustration
Interactive
Provider:
PBS LearningMedia
University Corporation for Atmospheric Research
Author:
National Science Foundation
WGBH Educational Foundation
Date Added:
12/17/2005
Antarctic Ice Movement: Part I
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This video segment adapted from NOVA explains why ice sheets move. To find out how fast they move, scientists carve a tunnel through a glacier.

Subject:
Chemistry
Earth and Space Science
Environmental Science
Physics
Material Type:
Activity/Lab
Diagram/Illustration
Provider:
PBS LearningMedia
University Corporation for Atmospheric Research
Author:
National Science Foundation
WGBH Educational Foundation
Date Added:
12/17/2005
Antarctic Ice: Sea Level Change
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What would happen if a portion of the Antarctic Ice Sheet were to melt? This video segment adapted from NOVA uses animations to show the effect of a 6-meter sea-level rise on coastal cities across the world.

Subject:
Chemistry
Earth and Space Science
Environmental Science
Physics
Material Type:
Activity/Lab
Diagram/Illustration
Provider:
PBS LearningMedia
University Corporation for Atmospheric Research
Author:
National Science Foundation
WGBH Educational Foundation
Date Added:
12/17/2005
Antarctica: A Challenging Work Day
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What happens when the ground under your feet is ice and it's moving? This video segment adapted from NOVA features some of the dangers faced by scientists conducting research in Antarctica.

Subject:
Chemistry
Earth and Space Science
Environmental Science
Physics
Material Type:
Activity/Lab
Diagram/Illustration
Provider:
PBS LearningMedia
University Corporation for Atmospheric Research
Author:
National Science Foundation
WGBH Educational Foundation
Date Added:
12/17/2005
Antarctica: Sea Ice
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This video segment adapted from NOVA uses microwave images to reveal how sea ice doubles the size of Antarctica each winter. Rare footage shows how sea ice crushed the famous ship Endurance in 1914.

Subject:
Chemistry
Earth and Space Science
Environmental Science
Physics
Material Type:
Activity/Lab
Diagram/Illustration
Provider:
PBS LearningMedia
University Corporation for Atmospheric Research
Author:
National Science Foundation
WGBH Educational Foundation
Date Added:
12/17/2005
Arch Bridge
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Educational Use
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This video segment adapted from Building Big illustrates the strength of the arch in bridge design and construction.

Subject:
Chemistry
Engineering
Physics
Material Type:
Activity/Lab
Provider:
PBS LearningMedia
Author:
National Science Foundation
WGBH Educational Foundation
Date Added:
01/22/2004