Earthquake
What are earthquakes?
The vibrations in the ground that result from movement along breaks in Earth's lithosphere
What is a volcano?
A vent in Earth's crust, through which melted or molten rocks flow.
What is seismic waves?
A rapid release of energy along a fault produces seismic waves
What is the definition for focus?
Where rocks first move along a fault
What are plate boundaries?
Area where Earth's lithospheric plates move and interact with eachother producing earthquakes volcanos, and mountain ranges.
Where do earthquakes commonly occur
Along plate boundaries
What causes volcanoes?
The movement of Earth's tectonic plates causing the formation of volcanoes
What is the fastest seismic waves?
Primary waves
What is the definition for "Seismometer" ?
In instrument that measures and records ground motion and can be used to determine the distance seismic waves travel.
What is a fault?
A break in earth's lithosphere where one block of rock moves toward, away from, or past another.
What are the three types of faults?
Stike-slipe, normal, and reverse
What is it called when not all volcano's form on or near plate boundary's
hot spots
What types of waves move in an up or down motion forming at right angles?
Secondary waves
What is the definition for magma?
Molten rock below Earths surface
What are the relationship between plate boundary's and earthquakes?
Earthquakes result from the build up and release of stress along active plate boundaries
Where is the epicenter located?
On earth surface directly about the earthquake focus
How many potentially active volcanoes are in the United States?
Approximately 60
What waves cause particles in the ground to move in a rolling motion
Surface waves
What is the definition for "Volcanic Ash" ?
Tiny particles of pulverized volcanic rock and glass.
What does the denser oceanic plate subduct into?
The mantle
Which plate boundary does the deepest earthquakes occur in?
A convergent plate boundary
What volcano is common along divergent plate boundary's and oceanic hot spots
Shield volcano's
What wave(s) can travel through Earth's interior?
Primary and secondary waves
What is the definition for viscosity?
A liquids resistance to flow
What is rock deformation?
Rock deformation is a force is applied to rock along plate boundaries, the rock can change shape.