Vocabulary
The name for volcanic fog.
What is vog?
Occurs when rocks move horizontally past each other.
What is a strike-slip fault?
Vibrations of energy that flow from the focus of an earthquake.
What are seismic waves?
This detects, times, and measures the movements of the earth.
What is a seismograph?
A volcano that has erupted at some point during a recorded time period and is expected to erupt again.
What is an active volcano?
The area around the Pacific ocean where many volcanoes are.
What is the Ring of Fire?
Occurs when rocks push together, forcing a section of rock upward.
What is a reverse fault?
What are P (primary) waves?
This occurs when part of a mountain collapses during a volcanic eruption causing mud and rock fragments to surge down the mountain.
What is debris flow?
A volcano that has erupted in the distant past but is currently inactive and not expected to erupt again.
The earth's crust and upper mantle.
What is the lithosphere?
Occurs when rocks move apart, forming a gap.
What is a normal fault?
Waves that occur underneath the surface and cannot move through liquid material.
What are s (secondary) waves?
The cause of a volcanic eruption.
What is heated magma rising to the surface?
A volcano that does not have a recorded eruption and is not expected to erupt in the future.
What is an extinct volcano?
The idea that the earth's crust is made up of moving plates.
What is the theory of plate tectonics?
The causes of an earthquake.
What are molten rock moves under a volcano, the buildup and release of energy when two surface plates move or shift, and when large amounts of earth are removed or added?
Slower waves that move on the surface and cause the most destruction.
What are surface waves?
A volcano that resembles a hill with a bowl-like crater at the top and usually contains one main event.
What is a cinder cone volcano?
A volcano with gradually sloping sides like an upside-down saucer.
What is a shield volcano?
The beginning point of an earthquake.
What is the focus?
What is the Richter scale?
The term for the strength of the seismic waves of an earthquake.
What is magnitude?
A large, symmetrical, cone-shaped volcano with steep sides.
What is a composite cone volcano?
The causes for the same volcano to have more than one type of eruption.
What is one eruption will change the conditions inside the volcano so it erupts differently the next time.
(Mount St. Helens)