Chapter 7 Flashcards
Pangaea
Continents were once part of one supercontinent
Continental drift
Which suggested that continents are in constant motion on the surface of Earth
Mid-ocean ridges
The mountain ranges in the middles of the oceans
Seafloor spreading
Is the process of which new oceanic crust forms along a mid-ocean an ridge
Normal polarity
A state in themselves point north
Magnetic reversal
Occur and magnetic field reverses direction and orient themselves to point south
Plate tectonics
Earth’s service is made of rock, or plates, that move with respect to each other.
Lithosphere
The cold and rigid outermost rock layer is called…
Divergent plate boundary
Forms when two plates slide past each other
Transform plate boundary
Forms when two plates slide away from each other
Convergent boundary plate
Forms where two plates collide. The denser oceanic shape sinks below the buoyant plate in process
Subduction
The denser plate sinks the more buoyant plate
Ridge push
The process of where Rating mantle mid-ocean ridges creates the potential for plates to move away from the ridge pull
Slab pull
As a slab sinks, it pulls on the other side of the plate
