Volcanoes
A mountain that forms in Earth's crust when molten material, or magma, reaches the surface.
What is a Volcano?
A location where volcanoes form far from plate boundaries.
What is a Hot Spot?
Magma that is low in silica will produce what kind of eruption?
What is an effusive eruption?
This volcano is not likely to erupt again.
What is an extinct volcano?
Vibrations caused by the sudden movement of rocks along a break in the Earth's crust.
What are "Seismic Waves"?
Molten mixture of rock-forming substances, gases, and water from the mantle
What is magma?
A boundary that is moving apart.
What is a diverging boundary?
Magma that is high in silica will produce what type of eruption.
What is an explosive eruption?
This volcano is not currently erupting, however there is seismic activity being recorded and it can erupt at any time.
What is an active volcano?
The earthquake intensity on this scale is based on descriptions of an earthquake's effects on people and structures. (Roman numerals)
What is the Mercalli Scale?
When magma reaches the surface it is called.
What is lava?
A boundary that is coming together or colliding.
What is converging boundary?
A material found in magma that forms from the elements oxygen and silicon.
What is silica?
Small, explosive volcanoes that build up around the vent in a steep, cone-shaped hill or small mountain.
What is a cinder cone volcano?
An instrument that measures and records seismic waves.
What is an seismograph?
What is the deadliest and most destructive volcano event in US history?
What is the 1980 eruption of Mt. St. Helens?
The volcanic belt consisting of volcanoes and earthquakes located at the rim of the pacific boundary, caused by the diverging and converging of plates in that area.
What is the Ring of Fire?
The mixture of hot gases, ash, cinders, and bombs that flow down the sides of a volcano when it erupts explosively.
What is pyroclastic flow?
This type of volcano is characterized by effusive eruptions, where magma flows out of a vent and hardens into a wide, flat mound.
What is a shield volcano?
The distance from an earthquake epicenter can be determined by finding the difference between the arrival times of the ___________________.
What are P and S waves?
The largest volcano in the Universe.
What is Olympus Mons on Mars?
This type on impact from a volcanic eruption affects the landscape & animals.
What is environmental impact?
This type of volcano is formed of layers of pyroclastic material and lava flows from alternating explosive and effusive eruptions.
What is a composite volcano or stratovolcano?
This amount of seismic stations are needed to determine the epicenter of an earthquake.
What is 3 (three)?