occurs where two plates move apart. Usually found in the ocean.
What is a divergent plate boundary?
100
Is caused by a sudden release of energy that has built up in rocks.
What is an Earthquake?
100
a mountain that forms as continental crust crumples and beinds into folds
What is a folded mountain?
100
the huge supercontinent scientist believe was present on Earth millions of years ago.
What is Pangea?
100
a fracture or break in Earth's lithosphere along which blocks of rock move past each other.
What is a fault?
200
underwater mountain ranges formed by the sea floor spreading.
What are mid ocean ridges?
200
the point of an earthquake that is underground and where the rocks first begin to move
What is the focus?
200
mountains that form as blocks of rock move up or down along normal faults
What are fault block mountains?
200
the scientist that first proposed the hypothesis of continental drift.
Who is Alfred Wegner?
200
a layer of liquid metals that surround the inner core
What is the outer core?
300
When one plate sinks beneath another plate due to its density being greater.
What is subduction?
300
the vibrations caused by earthquakes
What are seismic waves?
300
magma that reaches the earth's surface
What is lava?
300
hypothesis supported by fossils, climate and geology.
What is the theory of continental drift?
400
the gap between a mid ocean ridge where molten material rises for build new crust.
What is a rift valley?
400
occurs when blocks of rock move sideways along the fault plane.
What is a strike-slip fault?
400
a volcano that is cone-shaped. It usually has a violent eruption due to explanding gases being trapped and hardedned lava from previous explosions plugging vents.
What is a composite volcano?
400
when two plates carrying continental crust collide and push together. (Can form mountains- when both plates are the same density)
What is continental-continetal collision?
400
the motion caused by a transfer in heat energy that moves the tectonic plates.
What are convection currents?
500
occurs when ocean crust sinks under continental crust. (Can cause deep-ocean trenches or coastal mountains)
What is oceanic- continental subduction?
500
are located along tectonic plate boundaries, where most earthquakes occur.
What are faults?
500
a lava flow that rushes downhill knocking down or buyring everything in its way
What is a pyroclastic flow?
500
the theory that states that Earth's lithosphere is made up of huge plates that move over the surface of the Earth.