Geologic Time
Earth Layers
Plate Tectonics
Plate Boundaries
Images
100
Total number of mass extictions the Earth has experienced.
What is five?
100
The two types of crust.
What is oceanic and continental crust?
100
Alfred Wegener gave this name to the latest supercontinent.
What is pangaea?
100
Iceland has this type of plate boundary running through it.
What is divergent plate boundary?
100
Identify this type of plate boundary.
What is a Convergent Plate Boundary
200
The Era we currently reside in.
What is Cenozoic?
200
Type of rock that is found predominetaly in the continental crust.
What is granite?
200
Scientists who solidified the theory of Plate Tectonics.
Who is Harry Hess?
200
Mountains are formed along these types of plate boundaries.
What are convergent plate boundary?
200
Type of plate boundary this is an example of.
What is a Divergent Plate Boundary?
300
At the end of this Era dinosaurs became extinct.
What is Mesozoic?
300
Is comprised of the crust and upper mantle.
What is the lithosphere?
300
These two continents are used to support the theory of pangaea.
What is Africa and South America?
300
This geologic feature is found at transform plate boundaries and can cause massive earthquakes.
What are faults?
300
This layer of the Earth contains the convection currents.
What is the middle mantle (asthenosphere)?
400
The Cambrian Explosion occured during this Era.
What is Paleozoic?
400
This layer is the most dense due to being exposed to extreme temperatures and pressures.
What is the inner core?
400
Scientist who developed the theory of Continental Drift.
Who is Alfred Wegener?
400
At a divergent plate boundary new crust is formed through a process known as
What is seafloor spreading?
400
This layer of the Earth is responsible for maintaining our magnetic field.
What is the outer core?
500
Time period where cyanobacteria contributed oxygen to the atmosphere.
What is Precambrian?
500
Semi-rigid layer that the tectonic plates float on.
What is the asthenosphere?
500
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?
500
At a convergent plate boundary with a subduction zone this plate is pushed under the other tectonic plate.
What is oceanic?
500
These events occur at the end of each Era on the Geological Time Scale.
What are mass extinctions?