Continental Drift
The giant supercontinent where all landmasses were once joined together
Pangea
What kind of boundary do the plates slide past each other?
Transform Boundary
The scientist who came up with the theory of seafloor spreading
Harry Hess
Then process when once tectonic plate sinks under another plate
Subduction
These landforms are created when two continental plates crash into each other
Mountains/Folded Mountains
The scientist who came up with the idea of continental drift
Alfred Wegener
What kind of boundary do plate pull apart?
Divergent Boundary
The process that creates brand new ocean floor
Seafloor Spreading
Oceanic crust sinks because it is _______dense than continental crust
More
When two ocean plates meet, the one that is (denser or lighter) sinks underneath
Denser
Three pieces of evidence of continental drift are:
-Fossils
-Climate
-?
Coastlines/Landforms/Land Features
What kind of boundary do plates push together?
Convergent Boundary
Rock closest to a mid-ocean ridge is (younger or older) than rock that is farther away
Younger
This type of boundary is the only one where subduction occurs
Convergent Boundary
Which type of crust is thicker and lighter?
Continental Crust
___________ of the same ancient plants and animals were found on different continents
Fossils
Earthquakes happen along these line where plates meet.
Fault Lines
Liquid rock that rises up to make new ocean crust
Magma (Lava)
When two ocean plate collide, subductions forms a trench alongside a chain of these ocean features
Volcanic island arc
Oceanic Crust
Why did scientist not believe Wegener at first when he proposed his theory of continental drift?
He could not explain how or why the continents moved.
He was an outsider in the scientific community
Name the two types of crust on Earth
Oceanic & Continental
An underwater mountain chain formed were ocean plates pull apart
Mid-ocean Ridge
What is formed in the ocean floor when subduction occurs?
A trench
A massive horseshoe-shaped tectonic belt around the Pacific Ocean where most of the world's earthquakes and volcanic eruptions happen
The Ring of Fire