8A
What is another name for the Circum-Pacific volcano belt?
The Ring of Fire
Shield Volcano
What is an extinct volcano?
A volcano that has never erupted within historical times, shows no seismic activity, and is often heavily eroded.
Intrusive volcanism
Any process or feature of that involved the forcible entry of magma into a preexisting rock formation.
What do sills often act as?
Protective (against erosion) caps for the earth underneath.
What is a volcano?
A volcano is a depositional mountain landform built from solidified magma from deep in the earth.
Cinder Cone Volcano
A small, steep-sided volcano made mainly of cinder-like pyroclastic materials. Cinder cones generally form during brief, explosive emissions of cinders and ash.
Which volcanoes consist mainly of lava?
Shield volcanoes
Sill
A horizontal, shelflike igneous formations under the earth.
How deep does the climate affect the temperature of the earth?
Climate affects the temperature of the earth until about 400 feet below the surface.
Which (of the three kinds) of magma is least viscous?
Basaltic
Stratovolcano (or composite cone volcano)
A medium-sized volcano built up of deposits of lava from quiet eruptions alternating with layers of pyroclastic materials from explosive eruptions. The tall conical landform is what people usually associate with volcanoes.
What famous volcano destroyed the city of Pompeii in 79 AD?
Mount Vesuvius.
Pluton
What is the rate of the geothermal gradient?
What is the difference between magma and lava?
Magma is molten rock in the earth, while lava is molten rock that has escaped earth's interior.
Active Volcano
A volcano that is currently erupting or has erupted during recorded history.
What is the Volcanic Explosivity Index?
The VEI is an open-ended scale starting at 0 that is an estimate of the explosive power in a volcanic explosion.
Geothermal gradient
The rate at which temperature rises with increasing depth into the earth's interior
What is a famous geyser?
Old Faithful in Yellowstone National Park
What is tephra?
Rock fragments and particles ejected by a volcanic eruption.
Dormant Volcano
A volcano that has not erupted within recorded history. Seismic activity beneath it may indicate it could erupt in the future.
What are the three ways scientists classify volcanos?
1) Structure
2) Activity
3) Explosivity
Geyser
A hot spring that forcefully ejects hot water and steam from the ground at regular intervals.
What are some ways people use geothermal energy?
People use geothermal energy for heating homes, businesses, supplying fish and algae farms, feeding and watering livestock, heating greenhouses, supplying industrial chemical plants, and generating electricity.