Volcano
Boundaries
Vocabulary
Earthquakes
Earthquake Measurment
100
a mountain that forms in Earth's crust when molten material, or magma, reaches the surface.
What is a Volcano?
100
Divergent Boundary
What is a place in the mid-ocean ridges where volcanoes form and plates move apart.
100
Magma Chamber
Magma collects in a ______?
100
Earthquake
What is the shaking and trembling that results from movement of rock beneath Earth's surface is called an ______?
100
Seismograph
an instrument that records and measures an Earthquake's seismic waves.
200
a molten mixture of rock-forming substances, gases, and water from the mantle.
What is magma?
200
Convergent Boundary
What is a place where two oceanic plates collide?
200
Pipe
a long tube that extends from Earth's crust up through the top of the volcano.
200
Vibrations that are similar to sound waves.
What are seismic waves?
200
a scale that rates the amount of shaking from an earthquake
What is the Modified Mercalli scale?
300
a belt that forms along the boundaries of Earth's plates.
What is a volcanic belt?
300
a string of islands.
What is an island arc?
300
Vent
molten rock ad gas a leave a volcano from a _____?
300
the area beneath Earth's surface where rock that was under stress begins to break or move.
What is a focus?
300
a single number that geologists assign to an earthquake based on the earthquake's size.
What is magnitude?
400
One major belt of volcanoes.
What is the Ring of Fire?
400
hot spot
What is an area where material from deep within Earth's mantle rises through the crust and melts to form magma?
400
Lava flow
the spread of lava as it pours out of a vent.
400
Epicenter
the point on the surface directly above the focus is called the _____?
400
Richter scale
a scale that is based on the earliest magnitude scale.
500
A belt that includes many volcanoes that rim the Pacific Ocean.
What is a detailed explanation of the Ring of Fire?
500
Volcano
What forms above a hot spot when magma erupts through the crust and reaches the surface?
500
Crater
a bowl-shaped area that may form at the top of a volcano around the central vent.
500
P waves, S waves and Surface waves
What are the three main categories of seismic waves?
500
Moment Magnitude Scale
a scale geologists use to rate the total energy an earthquake releases.
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