layers
What layer do live on
Crust
Where do boundaries form
Crust
Who proposed the idea of continental drift
Alfred Wegener
What causes plates to move
Convection currents in the mantle
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
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 pieces of evidence helped the theory.
3
Where can you find new crust.
Where it is formed
Why is the inner core solid
Because of the extreme pressure
What boundary creates valleys
Divergent boundaries
Who helped the idea of continental drift
Harry Hess
True or false sea floor spreading help move the continents
True
True or false the magma takes a long time to harden
False
What is the inner core made of
Iron and nickel
How many types of boundaries are there
3
What are the three types of evidence
land features, fossils , climate
How fast do plates move
Around 4 inches in a year