Plate Boundaries
At this type of plate boundary, plates slide.
Transform
Who proposed the theory of continental drift?
Alfred Wegener
A continuous median mountain ridge extending through the ocean, which is seismically active and often has a central rift valley and rugged topography. It is an example of a divergent plate boundary and the site of sea-floor spreading and the formation of new ocean crust
Mid-Ocean Ridge
What feature(s) are created at a transform boundary?
Faultlines, earthquakes
Which scientist discovered that the ocean floor was not flat and in fact was covered in mid-ocean ridges?
Marie Tharp
At this type of plate boundary, two oceanic plates move apart producing new seafloor.
Divergent
What was the name of the super continent that existed 200 MYA?
Pangea
A vent in the surface of the Earth through which magma and associated gases and ash erupt. This geological feature is created from the subduction of oceanic crust.
Volcano
What feature(s) are created at an ocean-ocean divergent boundary?
Mid-ocean ridge and new seafloor
Which scientist discovered that the sizes of our oceans were changing due to seafloor spreading?
Harry Hess
At this type of plate boundary, neither continental plate will subduct but there is collision.
Continent-Continent Convergent
Lystrosaurus, Mesosaurus, Glossopteris were examples of what type of evidence that supported continental drift?
Fossils
A sudden motion or trembling in the Earth caused by the abrupt release of slowly accumulated strain and produces seismic waves
Earthquake
What feature(s) are created at continent-oceanic convergent boundary?
Trench, subduction zone, volcanic mountain chain, earthquakes
What do we call the belt that surrounds the Pacific Ocean where the most volcanoes and earthquakes in the world occur?
Ring of Fire
At this type of plate boundary subduction occurs when the older/denser oceanic plate subducts below another oceanic plate.
Ocean-Ocean Convergent
Name two landmasses that "fit together" like a puzzle (as seen as evidence for continental drift theory).
South America and Africa
A term for a large landmass formed by the collision and joining of several continental landmasses into a single, large continent
Supercontinent
What feature(s) are created at a continent-continent convergent boundary?
Mountains, earthquakes
Explain how continental drift and plate tectonic theory are related?
Plate tectonic theory states that the plates that make up Earth's surface are in constant slow motion. Due to plate tectonics, the supercontinent, Pangea was broken apart and continents have drifted to their present-day locations, suggesting that the plates have moved a great distance over geologic time.
At this type of plate boundary one plate containing oceanic crust will subduct under a second plate containing continental crust.
Explain how climate change of Antarctica can be seen as evidence for continental drift?
Coal deposits have been found in Antarctica indicating it once was in a warmer, tropical climate near the equator.
A zone of seismic and tectonic activity along the edges of lithospheric (tectonic) plates
Plate Boundary
What feature(s) are created at an ocean-ocean convergent boundary?
Trench, subduction zone, volcanic island arc, earthquakes
Explain how the Atlantic Ocean is expanding, while the Pacific Ocean is shrinking?
Atlantic ocean has more mid-ocean ridges where new crust is created, while the Pacific Ocean has more trenches where crust is destroyed at subduction zones.