The crust and upper mantle
The idea that the earth's crust is made of moving plates of land
Measures the earthquake's magnitude
Detects, times, and measures the movements of the earth
Breaks in the earth's crust where rocks can move
Occurs where water is heated by hot magma
Occurs when part of a mountain collapses, causing mud and rock fragments to surge down the mountain
An avalanche-like emission of red-hot dust and gases from a volcanic eruption
Magma that breaks through the earth's surface
Area around the Pacific Ocean where many volcanoes and earthquakes occur
Volcanic Fog
Which volcano is expected to erupt again within the next five years and has a bowl-like crater at its top?
Which volcano is presently inactive and seems to be layered, showing that different types of lava flows have happened in the past?
Which volcano has mild eruptions and is gradually sloping with a continuous flow of lava?
What causes a volcano to erupt
Occurs when rocks move horizontally past each other
Occurs when rocks push together, forcing a section of rock upward
Occurs when rocks move apart, forming a gap
The point on the earth's surface directly above the focus
What causes an earthquake?
Vibrations of energy that flow from the focus of an earthquake
Fast-moving waves that occur beneath the surface of the earth
Slow, destructive waves that occur on the earth's surface
The beginning point of an earthquake
The strength of the seismic waves
Lithosphere
Theory of Plate Tectonics
Richter Scale
Seismograph
Faults
Hot Springs
Debris Flow
Pyroclastic Flow
Lava
Ring of Fire
Vog
Active, Cinder-cone
Dormant, Composite-Cone
Active, Shield
Heated magma rising to the surface; a hot spot
Strike-slip Fault
Reverse Fault
Normal Fault
Epicenter
Molten Rock moves under vocano; Build-up and release of energy along a fault line; Large amounts of earth are removed or added to an area
Seismic Waves
Body Waves
Surface Waves
Focus
Magnitude
