Question

a student takes a piece of cardboard and cuts a rectangular slit in it. he then places two sheets of paper below the cardboard and pulls them through the slit. the sheets are pulled by their edges in opposite directions. which extremely slow process is he trying to model? a mountain building b sea - floor spreading c formation of the grand canyon d convergence of tectonic plates

Explanation:

The student's action of pulling the sheets of paper through the slit in opposite directions models the process where tectonic plates move apart, which is sea - floor spreading. Sea - floor spreading occurs at divergent plate boundaries where new oceanic crust is formed as the plates move away from each other. Mountain building is related to convergent plate boundaries. The formation of the Grand Canyon is mainly due to erosion. Convergence of tectonic plates is the opposite of what is modeled here.

Answer:

C. sea floor spreading