The movement of the Earth's continents relative to each other.
What is a Drifting Continent
100
This has molten rock, gas and suspended crystals.
What is magma
100
A magnitude scale which assigns a single number to quantify the amount of seismic energy released by an earthquake.
What is a Richter Scale
100
This is the stage in mountain forming is the the collision of two continents at a convergent plate boundary.
What is uplift mountain
100
This sliding plate force is a proposed mechanism for plate motion in plate tectonics.
What is a ridge push
200
The process that occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away.
What is seafloor spreading
200
The process through, which land features were foamed.
What is intrusive activity
200
This was developed by the seismologists Hanks and Kanamori during the 70's
What is a moment magnitude scale
200
A mountain that is formed when there is movement and a pulling apart of the Earth's crust.
What is a fault-block mountain
200
This is a measure of the resistance of a fluid to deformation under shear stress.
What is viscosity
300
The science and study of the causes of, and relative motions of, Earth's lithospheric plates.
What is theory of plate tonics
300
A volcano that is layered with harden basalts.
What is shield volcano
300
The part of an active fault that has experienced little or no seismic activity for a long period, indicating the buildup of stresses that are useful in predicting earthquakes
What is a seismic gap
300
The upper most layer of the Earth
What is the crust
300
This is a valley with steep sides that is formed by the action of geological rifts or fault lines.
What is a rift valley
400
Heat from the interior of the Earth, creating convection currents in the layer of the Earth known as the asthenosphere, where the rock is solid yet plastic, and has ductile characteristics.
What is the cause of plate motions.
400
A large, steep volcano built up of alternating layers of lava and ash or cinders
What is composite volcano
400
The point which is on the Earth's crust which is directly above the focus of an earthquake.
What is a epicenter
400
This sits just below the crust and extends approximately from 40 kilometers deep to about 600 kilometers below the surface.
What is a mantle
400
This is a longitudinal earthquake wave. It travels through the inside of the earth and is commonly the first wave that is out of the ordinary that a seismograph records.
What is a primary wave
500
This is the study of how the Earth's plates are driven and shaped by geological forces that keep them in constant motion.
What is plate tonics
500
A volcano which usually has a single vent from where the lava comes out.
What is a cinder cone volcano
500
A seem or crack in the earth's crust
What is fault
500
A line where two tectonic plates move toward each other and there is a collision. This is how earthquakes and volcanoes occur and are formed.
What is a convergent boundary
500
This is where the land regains its elevation after the ice sheets melt.