LPKW+3.2

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=3.2 Volcanic Activity=

Vocabulary

 * magma chamber**-a place where magma collects into a pocket
 * pipe**-a long tube where magma flows to the surface from the magma chamber
 * vent**-a place on the volcano where magma pours out of
 * lava flow**-a area covered by lava as it pours out of the vent
 * crater**-a bowl shaped area that may form at the top of the volcano at the top of the central vent
 * Silica**-made from the element silicon and oxygen
 * pahoehoe**-a hot, fast moving lava
 * aa**-a cooler, slow moving lava
 * pyroclastic flow**-occurs when explosive eruption trows ash, cinders, bombs, and maybe even gases
 * active**-a live volcano is erupting and may erupt in the future
 * dormant**-a sleeping volcano that is "sleeping" and may erupt in the future
 * extinct**-a volcano that is no longer active
 * hot spring**-a area where groundwater as been heated and rises to the surface forming a natural pool
 * geyser**-a fountian of water that erupts from the ground
 * geothermal energy**-how energy can be made using magma heated water from hot springs

Volcanic activity

 * How magma reaches the surface
 * Magma rises
 * magma is less dense that rock so it moves up
 * A volcano erupts
 * During an eruption, the dissolved gases rush out carrying magma with them
 * Inside a volcano
 * a volcano always has a pocket beneath them filled with molten material
 * Characteristics of magma
 * Types of volcanic eruptions
 * quiet eruptions
 * a volcano erupts smoothly during quiet eruptions
 * there two types of magma that produce quiet eruptions
 * Explosive eruptions
 * explosive eruptions erupts wildly with bottled up gas and huge rocks
 * Stages of a volcano
 * active
 * active volcanos are volcanos that continue to erupt
 * dormant
 * dormant volcanos are volcano that are "sleeping" which mean that they havent erupt in a long time
 * extinct
 * extinct volcanos no longer erupt
 * Other types of volcanic activity
 * volcanos might make other things that dont involve lava
 * one example is geysers and hot springs
 * Monitoring volcanoes
 * You can predict the time of an eruption
 * Volcano hazards
 * not all infomation on volcanos are acurate