Earthy Trivia
Robert Dietz added to the theory of plate tectonics by suggesting that these are the driving force behind sea floor spreading.
What are convection currents?
When two oceanic plates move away from each other at a divergent boundary, this landform is created.
What is a mid ocean ridge?
This physical layer of the core is solid.
What is the inner core?
This type of plate boundary is created when two tectonic plates slide past each other.
What is transform?
The two processes/forces that made the core hot as the Earth was being formed.
What are gravity (friction) and radioactive decay?
At convergent plate boundaries, this determines which plate subducts below another plate.
What is density?
When two continental plates of equal density collide, this landform is created.
What are mountains?
Which physical layer makes up the tectonic plates
What is the lithosphere?
This type of boundary is made when two tectonic plates move towards each other.
What is convergent
The heat source driving convection currents in the earth's interior?
What is the core?
This type of crust is thinner and more dense.
What is oceanic crust?
This is formed at subduction zones and are the deepest places on earth.
What are deep ocean trenches?
This layer of the Earth is said to be a plastic state of matter and that the tectonic plates "float" on top of.
What is the asthenosphere?
This boundary is formed when two tectonic plates move away from each other.
What is divergent?
The force from this heat transfer process causes the tectonic plates to move
What are convection currents?
What evidence did Alfred Wegener use to support his theory of Continental Drift
Fossils, Geology, Climate
When two continental plates pull apart at a divergent plate boundary, this landform is created.
What is a rift valley?
Convection currents are found in these two layers of the Earth's interior.
What are the outer core and the asthenosphere (mantle)?
Island arcs such as Japan are formed when two oceanic plates come together at this type of plate boundary.
What is convergent?
Tsunamis can be caused by a volcanic eruption or _________
an earthquake
The three pieces of evidence Harry Hess used to support his sea floor spreading hypothesis.
Pillow rocks, age of the sea floor and magnetic reversals.
Magma sometimes rises to the surface at subduction zones and creates this erupting landform.
What are volcanic islands?
The only liquid layer of the Earth.
What is the outer core?
This type of plate boundary is the leading cause of earthquakes.
What is transform?
This word describes the action of one plate moving below another plate and being remelted into the mantle.
What is subduction?