Earth's Interior
What are the 4 layers of the earth
Crust
Mantle
Outer core
Inner core
Heat transfer through empty space
radiation
Our supercontinent was called
Pangea
slip past each other in opposite directions
transform
What device was used?
Sonar
What is the soft rock layer
Lower mantle
Heat transfer through direct contact
conduction
Why was wegners theory rejected
Lack of explanation
Pull apart from each other
divergent
What was discovered through sea floor mapping
mid ocean ridge
How could you describe the upper mantle
Hard rock
Heat transfer by moving fluid (rising and falling)
Convection
What were Wegners 3 pieces of evidence
fossils, climate, landforms
Plates come together
convergent
The further from the ridge, the age of the rock gets
older
What layer dos convection currents take place
mantle
what direction does heat move
hot to cold
This landform lined up on separate continents
mountain range (S. American, Africa)
causes seafloor spreading
divergent
Opposite edge of the seafloor (plate) _______ under the plate it collides into forming a __________ in a process called ________________.
slide
trench
subduction
On what 2 layers are tectonic plates
Crust, and upper mantle (lithosphere)
How does convection contribute to continental drift
convection in our mantle moves plates causing continents to shift
2 continental plates form
mountains
Older, denser (because it’s _______) plate gets subducted.
cooler