Study Guide (Part 2)
Plate Boundaries
Key Vocabulary Terms for Part 2:

Collision Boundary – a convergent boundary where two continents have come together and
are welded into a single, larger continent.

Convergent Boundary – a boundary between two plates that are moving toward each other
(converging)

Deep-sea Trench – a long, narrow, steep-sided trough that runs parallel to continental
margins or to volcanic island chains.

Divergent Boundary- a boundary between two lithospheric plates that are moving apart.

Rift – a crack or opening in Earth’s crust

Rift Valley – a deep valley that at a point where lithospheric plates are moving apart, such as
at a mid-ocean ridge

Subduction Boundary – a convergent boundary where an oceanic plate is plunging beneath
another, overriding plate.

Transform Boundary – a boundary between two plates that are sliding past each other
Notes for Part 2:

What are the 3 main types of plate boundaries (pg.176)? divergent, convergent, transform

What are divergent boundaries sometimes called (pg. 176)? Spreading centers

What rises from the middle of the rifts and what forms (pg.176)? magma that forms new
ocean crust

What are 2 geological examples of divergent boundaries (pg. 176)? Mid-Atlantic Ridge, East
Pacific Rise
Study Guide (Part 2)

What are the 2 broad classifications for convergent boundaries (pg. 177)? Subduction
boundary, collision boundary

What is an important geological feature of a subduction boundary (pg. 177)? Deep-sea trench

What accompanies a deep-sea trench with oceanic-oceanic convergence (pg. 177)?
Formation of a chain of volcanic islands called a volcanic island arc

What is 1geological example of an oceanic-oceanic convergence (pg.177)? Mariana Trench

What happens at an oceanic-continental convergence (pg. 177)? The oceanic plate subducts
beneath the continental plate

What does density have to do with oceanic-continental convergences (pg.177)? The denser
oceanic plate goes beneath the less dense continental plate.

What accompanies an oceanic-continental convergence on the continent (pg. 177)? Volcanic
mountain range

What is 1 geological example of an oceanic-continental convergence (pg. 178)? The Andes
Mountains

What happens at a continental-continental convergence (pg. 178)? The two plates fuse
together creating one continental plate

What accompanies a continental-continental convergence (pg. 178)? A mountain range

What is 1 geological example of a continental-continental convergence (pg. 178)? Himalaya
Mountains

What is 1 geological example of a transform boundary (pg.178)? San Andreas Fault
Study Guide (Part 2)
Pictures to help you study!!!
Study Guide (Part 2)