Gourt > Kids and Teens > School Time > Science > The Earth > Geology > Volcanoes
A volcano is a geological landform usually generated by the eruption through a vent in a planet's surface of magma, molten rock welling up from the planet's interior. Volcanoes of various types are found on other planets and their moons as well as on earth. Roughly defined, a volcano consists of a magma chamber, pipes and vents. The magma chamber is where magma from deep within the planet pools, while pipes are channels that lead to surface vents, openings in the volcano's surface through which lava is ejected during an eruption.
Though the common perception of a volcano as a mountain spewing lava and poisonous gases from a crater in its top is not wrong per se, the features of volcanoes are much more complicated and vary from volcano to volcano depending on a number of factors. Some volcanoes even have rugged peaks formed by lava domes rather than a summit crater, whereas yet others present landscape features such as massive plateaus. Vents that issue volcanic material (lava, which is what magma is called once it has broken the surface, and ash) and gases (mainly steam and magmatic gases) can be located anywhere on the landform. Many of these vents give rise to smaller cones such as Puu Ōō on a flank of Hawaii's Kīlauea.
Other types of volcanoes include ice volcanoes (particularly on some moons of Jupiter, Saturn and Neptune) and mud volcanoes. Mud volcanoes are formations often not associated with known magmatic activity. Active mud volcanoes tend to involve temperatures much lower than those of igneous volcanoes, except when a mud volcano is actually a vent of an igneous volcano. On Earth, volcanoes tend to occur near the boundaries of crustal plates. Important exceptions exist in hotspot volcanoes, which occur at locations far from plate boundaries; hotspot volcanoes are also found elsewhere in the solar system, especially on its rocky planets and moons.
More on [ Volcano ]
Tutor.com Launches New Website for Students #1 Online Homework ... - Business Wire EON (press release)
Thu, 28 Aug 2008 14:53:51 -0000
Business Wire EON (press release)Tutor.com Launches New Website for Students #1 Online Homework ...Business Wire EON (press release), WA - 2 minutes agoNew articles will be posted each month to help students navigate the often frustrating and confusing school experience. Students may also earn free minutes ...
Students will have 'Live Homework Help' - Wicked Local
Wed, 27 Aug 2008 17:53:49 -0000
Students will have 'Live Homework Help'Wicked Local, MA - 21 hours agoCOM When school starts next week, students, and their parents, will have a little extra help with homework . The Ipswich Public Library is now offering the ...
A Homework Course Helps Parents Learn How to Stop Hovering - Washington Post
Thu, 28 Aug 2008 06:19:10 -0000
A Homework Course Helps Parents Learn How to Stop HoveringWashington Post, United States - 8 hours agoThe same lessons can extend to homework. By facing consequences from teachers and other authorities at school, students can learn the effects of not ...
Retailers will help you reboot for school - Staten Island Advance - SILive.com
Thu, 28 Aug 2008 13:56:47 -0000
Retailers will help you reboot for schoolStaten Island Advance - SILive.com, NY - 59 minutes agoPersonally, I would be thrilled to be heading to a place where nap time is a must and homework is still not a part of the curriculum. ...
Transition Programs Aim to Help Freshmen Adjust to High School - RedOrbit
Thu, 28 Aug 2008 14:47:18 -0000
Transition Programs Aim to Help Freshmen Adjust to High SchoolRedOrbit, TX - 8 minutes agoOver the next three days, the students rotated between classrooms, where they took short assessments and learned how to compose notes, handle homework and ...
Cheating: Do you do your children’s homework? - Fort Worth Star Telegram
Wed, 27 Aug 2008 13:26:52 -0000
Cheating: Do you do your children’s homework?Fort Worth Star Telegram, TX - Aug 27, 200838 percent of the homework help was in math. 28 percent of the homework help was in English. What are your school’s rules about helping your children with ...
Ask a Volcanologist - Volcano experts offers answers to well over 100 user-submitted questions.
Cascades Volcano Observatory - Information about and photos of the Cascades volcanoes, Mount Saint Helens updates, and volcano monitoring and hazards information.
Meta Description: [ The U.S. Geological Survey's
Cascades Volcano Observatory Website, which focuses on hazards, activity,
history, and monitoring of volcanoes, with emphasis on volcanoes of the
Western United States. ]
Cinder Cones - View a photograph and learn some basic information about this type of volcano.
Etna - Thar She Blows! - A photo essay from Time recording the eruption of the volcano from July 12 - 27, 2001.
Meta Description: [ Europe's most active volcano comes back to life ]
Fallout - National Geographic feature explains how volcanoes form and examine the destruction wrought on the Caribbean island of Montserrat.
FEMA For Kids: Volcanoes - Explains what a volcano is and identifies active volcanoes in the United States.
Geothermal Features and How They Work - Yellowstone National Park provides information about geothermal features like hot springs, mudpots, fumaroles (steam vents), geysers and more.
NOVA Online: Deadly Shadow of Vesuvius - Talks about the Volcanic Explosivity Index. Talks about predicting volcanic activity and disaster planning.
Meta Description: [ NOVA Online presents Deadly Shadow of Vesuvius ]
NOVA: Volcano's Deadly Warning - Companion Web site to the NOVA program. An interview with seismologist Bernard Chouet, who has come up with a new method for predicting volcanic eruptions.
Meta Description: [ In this companion Web site to the NOVA program Volcano's Deadly Warning, read an interview with seismologist Bernard Chouet, who has come up with a new method for predicting volcanic eruptions; explore the anatomy of a volcano; find a teacher's guide and program transcript; and more. ]
VolanoWorld Virtual Field Trips - Choose from 6 volcano virtual field trips. Includes photos and maps.
Volcano World - Ask a volcanologist questions, see webcams of volcano eruptions, and read interviews.
Meta Description: [ The Web's Premier Source of Volcano Info ]
Volcano World: Top 101 Ask a Volcanologist Questions - Questions about volcanoes in general, and about specific volcanoes.
404
Volcanocam - Popocatepetl in Central Mexico. Includes refreshable images and background information.
Volcanoes - This interactive exhibit, part of the Exhibits Collection of The Annenberg/CPB Projects, explores why volcanic eruptions occur. Activities invite visitors to melt rocks, locate famous volcanoes and play the role of a volcanologist. Includes video clips.
Meta Description: [ This interactive exhibit, part of the Exhibits Collection, explores why volcanic eruptions occur. Activities in the exhibit invite visitors to melt rocks, locate famous volcanoes and play the role of a volcanologist. The exhibit also includes video clips and related Web sites of interest. ]
Volcanoes of Other Worlds - A look at volcanoes on Mars, Venus, the Earth's moon and Io.
Volcanoes Online - Thinkquest site offers a basic introduction to volcanoes and plate tectonics. In English and Dutch.
Meta Description: [ Volcanoes Online - Your Ultimate Guide to Volcanoes on the Net! Brought to you by Thinkquest Team 17457. Do sign the guestbook. =) ]
VolcanoWorld Kids' Door - Includes stories about volcanoes by children's author Jane Kurtz, school project ideas, legends, virtual field trips, and games.
VolcanoWorld: Volcanoes Erupting - Watch fascinating video clips of volcanoes erupting.
What is a Volcano? - Volcano facts and a glossary.
Yellowstone Volcano Observatory - Site monitors the largest volcanic system in North America. Offers information about current activity, volcanic history and a photo gallery.
Meta Description: [ The Yellowstone Volcano Observatory (YVO) monitors earthquakes, ground deformation, stream discharge and other geological signals that can be used to detect volcanic unrest. Information about Yellowstone National Park including volcanic history, frequently asked questions, photos, news stories, ... ]
| Volcanoes with soundtrack - Arthur Lyman's 'Yellow Bird'. Archive.org supplied the footage - Prelinger collection ... | |
| Next Video | |
