Vocabulary
A large, tall, rocky area of land that comes up out of the Earth's surface. Usually due to convergent boundaries
Mountains
When one crust goes underneath another crust, this is called
subduction
When two oceanic plates converge they form a ______ at the bottom of the ocean floor
trench
When new land is formed under the sea, this is called
seafloor spreading
When two plates move horizontally past one another
Transform boundaries
a long stretch of mountains.
mountain range
Scientists think continents were once a large single landmass that broke apart and then the continents slowly DRIFTED to their present locations. What is the name given to this hypothesis?
Continental Drift
Wegener called the large landmass
Pangea
A mountain that forms from lava is a ...
volcano
When two tectonic plates collide with one another, causing subduction and or mountain building
Convergent Boundaries
these form when magma rises into the gap between diverging plates. They thus occur at or near actual plate boundaries
rift valleys
An underground holding pool for hot magma is called a...
Hot mantle plume/ magma chamber
What causes the plates to move?
convection currents
When two plates move away from one another
Divergent Boundary
an underwater mountain system with a rift or valley.
an ocean ridge
What else did Wegener find to help bring evidence for his theory?
fossils and rock layers