The Sun is a huge, glowing ball at the center of our solar system. The sun provides light, heat, and other energy to Earth....
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The Sun is a huge, glowing ball at the center of our solar system. The sun provides light, heat, and other energy to Earth. The sun is made up entirely of gas. Most of it is a type of gas that is sensitive to magnetism. This sensitivity makes this type of gas so special that scientists sometimes give it a special name: plasma. Nine planets and their moons, tens of thousands of asteroids, and trillions of comets revolve around the sun. The sun and all these objects are in the solar system. Earth travels around the sun at an average distance of about 92,960,000 miles (149,600,000 kilometers) from it.The sun's radius (distance from its center to its surface) is about 432,000 miles (695,500 kilometers), approximately 109 times Earth's radius. The following example may help you picture the relative sizes of the sun and Earth and the distance between them: Suppose the radius of Earth were the width of an ordinary paper clip. The radius of the sun would be roughly the height of a desk, and the sun would be about 100 paces from Earth. This site explores the sun and includes images, related links and other materials.
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Reference Material
Author:
NASA
Date Added:
Jul 08, 2009
Date Modified:
Oct 31, 2014
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National Park Service
Date Added:
May 23, 2007
Date Modified:
Apr 30, 2015
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Ever since lava first erupted above sea level over 500,000 years ago to begin building the Island of Hawai`i, countless ...
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Ever since lava first erupted above sea level over 500,000 years ago to begin building the Island of Hawai`i, countless eruptions from its five volcanoes have built the "Big Island" to a towering height of more than 4,000 m (13,000 ft). Its two most active volcanoes -- Mauna Loa and Kilauea -- erupt lava frequently enough to pose a serious hazard to property on many parts of the island. About 40 percent of Mauna Loa has been covered by lava in the past 1,000 years and over 90 percent of Kilauea's surface is covered by lava less than 1,100 years old. As land development expands toward areas of relatively high hazard, the threat to life and property on Hawai`i will increase accordingly.
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USGS
Date Added:
Jul 06, 2009
Date Modified:
Sep 27, 2012
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This is a social network for teachers.
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Social Networking Tool
Author:
We Are Teachers
Date Added:
Jun 22, 2010
Date Modified:
Jun 23, 2012
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Weather is the state of the atmosphere at some place and time. We describe the weather in many ways. For example, we may...
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Weather is the state of the atmosphere at some place and time. We describe the weather in many ways. For example, we may refer to the temperature of the air, whether the sky is clear or cloudy, how hard the wind is blowing, or whether it is raining or snowing. At any given time, the weather is fair in some places, while it rains or snows in others. In some places it is warm, and in others it is cold.Earth is not the only planet with a variety of weather conditions. Every planet in the solar system except Mercury and perhaps Pluto has enough of an atmosphere to support weather systems. In addition, Titan, a moon of the planet Saturn, has such an atmosphere. Pluto is so far away that little is known about its atmosphere. The remainder of this article discusses the weather on Earth.
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Reference Material
Author:
NASA
Date Added:
Jul 08, 2009
Date Modified:
Sep 12, 2016
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'A black hole is a place in space where gravity pulls so much that even light can not get out. The gravity is so strong...
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'A black hole is a place in space where gravity pulls so much that even light can not get out. The gravity is so strong because matter has been squeezed into a tiny space. This can happen when a star is dying.Because no light can get out, people can't see black holes. They are invisible. Space telescopes with special tools can help find black holes. The special tools can see how stars that are very close to black holes act differently than other stars.'Found here is informaiton about black holes as well as some lesson plans at the bottom.
Material Type:
Reference Material
Author:
NASA
Date Added:
Jul 08, 2009
Date Modified:
Mar 21, 2016
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A planet is a large, round heavenly body that orbits a star and shines with light reflected from the star. Eight planets...
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A planet is a large, round heavenly body that orbits a star and shines with light reflected from the star. Eight planets orbit the sun in our solar system. In order of increasing distance from the sun, they are: (1) Mercury, (2) Venus, (3) Earth, (4) Mars, (5) Jupiter, (6) Saturn, (7) Uranus, and (8) Neptune. Many nearly planet-sized objects, called dwarf planets, also orbit the sun. Dwarf planets include Pluto and Ceres. Since 1992, astronomers have discovered many planets orbiting other stars. This site describes what a planet is and has a link to an educator's guide.
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Reference Material
Author:
NASA
Date Added:
Jul 08, 2009
Date Modified:
Oct 22, 2014
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This firm presents educators worldwide with a clearinghouse of lesson possibilities. They do offer professional development...
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This firm presents educators worldwide with a clearinghouse of lesson possibilities. They do offer professional development for a fee.
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Collection
Author:
21st Century Schools
Date Added:
Feb 10, 2008
Date Modified:
Nov 17, 2015
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Absolutely wonderful resource for practice in all content areas across the grade levels.
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Collection
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Troy Tenhet
Date Added:
Nov 29, 2007
Date Modified:
Nov 29, 2007
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'The dancing lights of the aurora provide spectacular views on the ground, but also capture the imagination of scientists who...
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'The dancing lights of the aurora provide spectacular views on the ground, but also capture the imagination of scientists who study incoming energy and particles from the sun. Aurora are one effect of such energetic particles, which can speed out from the sun both in a steady stream called the solar wind and due to giant eruptions known as coronal mass ejections or CMEs. After a trip toward Earth that can last two to three days, the solar particles and magnetic fields cause the release of particles already trapped near Earth, which in turn trigger reactions in the upper atmosphere in which oxygen and nitrogen molecules release photons of light. The result: the Northern and Southern lights.'One can access specific lesson plans at the bottom right.
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Reference Material
Author:
NASA
Date Added:
Jul 08, 2009
Date Modified:
Oct 31, 2014
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