CSTC+3.2

toc

Vocabulary

 * Magma chamber:** a pocket beneath the volcano that collects magma


 * Pipe:** a long tube in the ground that connects the magma chamber to the crust


 * Vent:** an opening where molten rock and gas leave the volcano


 * Lava Flow:** the area covered in lava as it leaves the vent


 * Crater:** a bowl-shaped area that may form at the top of a volcano


 * Silica:** a material that is formed by the elements oxygen and silicon


 * Pahoehoe:** a type of lava that flows quickly


 * Aa:** a type of lava that is cooler and moves slowly


 * Pyroclastic flow:** occurs when an explosive eruption hurls out ash, bombs, and more


 * Active:** a volcano that is still able to erupt is an active volcano


 * Dormant:** a sleeping volcano, would not erupt for a while


 * Extinct:** a dead volcano, unlikely to erupt


 * Hot Spring:** forms when groundwater heated by a nearby body of magma rises to the surface and collects in a natural pool


 * Geyser:** a fountain of water and steam that erupts from the ground


 * Geothermal energy:** water heated by magma can provide a clean and reliable energy source

Outline

 * How Magma Reaches Earth's Surface**
 * magma rises
 * a volcano erupts
 * under tremendous pressure


 * Inside a Volcano**
 * magma chamber
 * pipe
 * vent
 * lava flow
 * crater


 * Characteristics of Magma**
 * Silica


 * Types of Volcanic Eruptions**
 * quiet eruptions
 * Pahoehoe
 * aa
 * explosive eruptions
 * pyroclastic flow


 * Stages of a Volcano**
 * active volcano
 * dormant volcano
 * extinct volcano


 * Other Types of Volcanic Activity**
 * hot spring
 * geyser
 * geothermal energy