chapter 25 Flashcards
system of mountain ranges on the seafloor separated by valleys
mid-ocean ridge
a long narrow depression in between peaks
rift valley
the boundary where two plates collide
convergent plate boundary
the denser plate dives beneath the continent
subduction
the boundary between 2 plates that are moving apart
divergent plate boundary
plates slide horizontally past each other transform plate boundary
transform plate boundary
the sudden movement or vibration of the ground
earthquake
fault a crack in earth’s crust along which rock has moved
fault
strain energy and moves along a fault
elastic rebound
focus the point of origin for an earthquake
focus
the point on Earth’s surface directly above the focus
epicenter
Who came up with the continental hypothosis
Alfred Wegener
What are the 3 types of plate-boundaries
convergent, divergent, transform
Who came up with seafloor spreading
Harry Hess
What evidence did he find to back up his hypothesis
Large animal fossils, coast lines matched up like puzzle pieces, mountain ranged matched up with the same rock type and ages
How did he discover seafloor spreading
sonar
What did Hess discover using sonar
mid-ocean ridge
What was the name of the Super Continent
Pangaea
How do convergent boundaries move
come together and converge
Subduction zones only happen with which type of plate boundary
convergent plate boundary
What two types of crust are used for plate boundary
oceanic and continental
What landforms can be created
volcanoes
What two types of land forms can form when 2 oceanic crusts converge
hot spots that create chain isalands, deep sea trenches
what type of landforms are created when two continental converge
mountains
