Total number of mass extictions the Earth has experienced.
What is five?
What is oceanic and continental crust?
Alfred Wegener gave this name to the latest supercontinent.
What is pangaea?
Iceland has this type of plate boundary running through it.
What is divergent plate boundary?
Identify this type of plate boundary.
What is a Convergent Plate Boundary
The Era we currently reside in.
What is Cenozoic?
Type of rock that is found predominetaly in the continental crust.
What is granite?
Scientists who solidified the theory of Plate Tectonics.
Who is Harry Hess?
Mountains are formed along these types of plate boundaries.
What are convergent plate boundary?
Type of plate boundary this is an example of.
What is a Divergent Plate Boundary?
At the end of this Era dinosaurs became extinct.
What is Mesozoic?
Is comprised of the crust and upper mantle.
What is the lithosphere?
These two continents are used to support the theory of pangaea.
What is Africa and South America?
This geologic feature is found at transform plate boundaries and can cause massive earthquakes.
What are faults?
This layer of the Earth contains the convection currents.
What is the middle mantle (asthenosphere)?
The Cambrian Explosion occured during this Era.
What is Paleozoic?
This layer is the most dense due to being exposed to extreme temperatures and pressures.
What is the inner core?
Scientist who developed the theory of Continental Drift.
Who is Alfred Wegener?
At a divergent plate boundary new crust is formed through a process known as
What is seafloor spreading?
This layer of the Earth is responsible for maintaining our magnetic field.
What is the outer core?
Time period where cyanobacteria contributed oxygen to the atmosphere.
What is Precambrian?
Semi-rigid layer that the tectonic plates float on.
What is the asthenosphere?
One piece of evidence used to support the theory of continental drift was the continents fit together like puzzle pieces. Name the other types of evidence.
What are fossils, rocks, glaciers, climate, and mountains?
At a convergent plate boundary with a subduction zone this plate is pushed under the other tectonic plate.
What is oceanic?
These events occur at the end of each Era on the Geological Time Scale.
What are mass extinctions?