Plate Boundaries
What type of plate boundary causes a Mid ocean ridge?
convergent (Oceanic V.S. Oceanic)
There are --- crust types.
two
What forms when two oceanic plates are divergent (moving away from each other).
A Mid ocean Ridge
What is it called when a plate sinks underneath another?
Subduction
What type of boundary is responsible of earthquakes?
Transform
What type of boundary causes tall, ridged mountains like the Alps and Himalayans.
convergent (Continental V.S. Continental)
The alps formed when two ----------- crusts converged.
Continental
A ------- forms at a weak point, divergent boundary, and convergent boundary (oceanic vs. continental).
volcano
What liquid/semi-liquid is released through volcanoes and mid ocean ridges?
Magma
Places near fault lines and high tectonic movement are what?
Earthquake prone areas
What type of plate boundary caused the formation of Mt. Saint Helens?
Convergent (oceanic V.S. continental)
A deep ocean trench forms when a dense ------- crust collides with a less dense ------- crust.
A -------- forms when two plates collide.
Mountain.
What did Harry Hess theorize?
Seafloor spreading
What fault line is near California?
San Andreas Fault
What type of boundary causes the formation of new crust?
Divergent (oceanic)
New crust is more dense or less dense?
Less Dense
A ---- ----- ------ can form in a subduction zone. where an older denser oceanic crust collides and sinks below the newer less dense oceanic crust.
Deep Ocean Trench
What force moves tectonic plates?
Convection currents
The Marianas trench is a well-known what?
Deep ocean Trench
What type of boundary causes the formation of a fault?
Divergent (continental)
Older crust is more dense or less dense?
More dense
A ---- ------ forms when the lithosphere is pulled apart at divergent plate boundaries.
Rift Valley
Mid ocean ranges and volcanoes are both examples of what?
Places where new crust is formed
Mt. Everest is in what mountain range?
Himalayas.