Liquid rock that forms underneath the Earth's surface?
What is Magma
100
What are the three types of volcanoes
What is shield, cone, and composite
100
A quiet eruption produces what?
What is lava flows
100
What does mount Rainier produce that is different from other volcanoes
What is lahars
100
A volcanically active area of the earth’s surface not on a tectonic plate boundary line?
What is a hot spot
200
What is Volcanism?
What is any activity that includes the movement of magma toward or onto earth’s surface
200
Describe a shield volcano
What is broad at the base, numerous quiet eruptions, sloping sides
200
Why does an explosive volcano occur?
What is large amounts of trapped gas
200
When did Mount Saint Helens erput?
What is 1980
200
How Hot is lava?
What is over 2,000 degrees F
300
Magma that flows onto the earth's surface is called?
What is lava
300
A volcano that is very steep, Form from explosive eruptions, and produce Pyroclastic material is described as what?
What is cinder cone volcano
300
What is pyroclastic material?
What is fragments of rock that form during eruption
300
Describe the two types of lahars
What is meltwater generated lahars (come from melting snow and ice from glaciers) and landslide generated lahars (molten rock intrudes into volcano weakening volcanic rock, causing landlide)
300
What are the three ways magma forms?
What is temperature, pressure, and, addition of fluids
400
What is a mid-ocean ridge?
What is When plates are moving away from each other
400
Describe a composite volcano
What is Alternating layers of lava flow and pyroclastic material, Quiet and explosive eruptions , Form large volcanic mountains
400
What is a pluton?
What is a large formation of igneous rock
400
What are 3 ways the environemnt can be effected from an eruption from either Mount Rainier or Mount St. Helens?
What is water systems, ecosystems, forests, plants/animals, etc.
400
What is the definition of a volcano?
What is a vent in earth’s surface where magma and gases are expelled
500
What occurs in a subduction zone? How does it create an island arc?
What is when one tectonic plate is moving under another one. A trench forms, causing water to mix with the crust and mantle, creating a volcano
A string of these volcanoes can form across a plate = island arc
500
What type of volcano was Mount st. Helens?
What is composite
500
What do Hawaiin's call lava flows?
What is Pahoehoe
500
What are 3 things a person should do to stay safe when near a volcano?
What is know the warning signs, have a plan if an eruption occurs, check USGS for activty, listen for roaring or watch for ground shaking, move to high ground, etc.