Physical Layers of the Earth
As one moves away from the mid-ocean ridge (at divergent boundary), the age of the crustal rock on the ocean floor _?_.
increases
the layer of Earth that lies below the asthenosphere and above the outer core (hard! bonus question)
the mesosphere
List three of the main proofs for continental drift.
continental coasts fitting together, similar fossils, similar rocks, and glacial grooves
Name the main problems scientists had with continental drift theory.
the mechanism that was pushing the continents was unknown
The locations of frequent _?_ along plate boundaries help support the theory of plate tectonics.
earthquakes OR volcanoes