Volcanic Vulcanian Eruption
Volcano Terms and Definition

volcanism
Volcanism
Volcanic eruptions are the clear and dramatic expression of dynamic processes going on in planet Earth. The author, one of the most profound specialists in the field of volcanology, explains in a concise and easy to understand manner the basics and most recent findings in the field of volcanology.





Elenco Electronics
Electronic Snap Circuits by Elenco is an award-winning toy for budding engineers eight years old and above.
Vulcanian Eruption
A vulcanian eruption is a type of explosive eruption that ejects new lava fragments that do not take on a rounded shape during their flight through the air. This may be because the lava is too viscous or already solidified. These moderate-sized explosive eruptions commonly eject a large proportion of volcanic ash and also breadcrust bombs and blocks. Andesitic and dacitic magmas are most often associated with vulcanian eruptions, because their high viscosity (resistance to flow) makes it difficult for the dissolved volcanic gases to escape except under extreme pressure, which leads to explosive behavior.


Eruption column caused by a vulcanian-type explosive eruption rises above Tavurvur Volcano in Rabaul Caldera, Papua New Guinea.

  • Vulcanian eruptions are named for Vulcano, one of the Aeolian Islands north of Sicily. In fact, the word volcano itself comes from this island, home to the Greek god of fire, Hephaestus (called Vulcan by the Romans).
  • Other volcanoes that have recently shown vulcanian behavior include Sakurajima in Japan (ongoing) and Irazu in Costa Rica (1965).

NOVA - In the Path of a Killer Volcano
The scientists who remain behind- and see some astonishing footage of the world's largest volcanic eruption in 80 years.




World of the Microscope
Science & Experiments Series

Fascinating, hands-on introduction to using microscopes


Digtal Microscope

Volcano Glossary



          

           

Leapfrog Learning Systems

  • Handheld computerized learning system
  • Learn to write letters on the L-Max handheld screen - the letters you write will appear on the TV and star in an animated story!
  • Learn on the go or at home
  • Works with the full Leapster and Leapster L-Max software library
  • Stories suddenly come to life with the light tap of the Magic Pen
  • The award-winning LeapPad Learning System teaches fundamental reading skills in a way that keeps your child coming back again and again
  • The LeapPad Learning System uses a larger platform and thinner pen designed for preschoolers and kindergartners to introduce them to the magic of books and reading
  • The library is organized by grade to teach reading, phonics, vocabulary, math, science, music and much more



Source:
U.S. Department of the Interior