layers
What layer do live on
Crust
Where do boundaries form
Crust
Who proposed the idea of continental drift
Alfred Wegener
True or false we live on plates
true
Where does the magma come from
Mantle
What layer is the thickest
Mantle
What boundaries collide
Convergent boundaries
What is the super continent called
Pangea
What causes plates to move
Convection currents in the mantle
Where does seafloor spreading occur.
Mid Ocean ridges.
What layer is completely liquid
Outer core
What kind of boundaries creates an earthquake
Transform boundaries
how many types of evidence are there to support the theory
3
how far do the plates move in a year
About 4 inches
dose seafloor spreading happen in random places
It doesn't if happens at mid ocean ridges
Why is the inner core solid
Because of the extreme pressure
What boundary creates valleys
Divergent boundaries
Who helped The continental drift theory
Harry Hess
how many minor plates are there
8
Where can you find newest crust.
Where it is formed
What is the inner core made of
Iron and nickel
How many types of boundaries are there
3
What are the types of evidence
landforms,fossils,and climate
how many major plates are there
true or false sea floor spreading helps move the plates
true