5. when the sea floor spreads apart, volcanoes and ridges are formed because - a. sediments are deposited where the floor spreads, building ridges b. as the plates pull apart, magma moves to the surface, building ridges c. ocean water pushes down on the surrounding sea floor, pushing up ridges d. underwater earthquakes lift the sea floor into long ridges

At a continent-continent convergence,

What is the "great pacific garbage patch"? (a) a large area of marine debris concentrated by rotating ocean currents (b) a large area around the pacific rim where debris collects from natural disasters such as tsunamis (c) an area in the pacific ocean where trash is intentionally dumped due to lack of landfill availability (d) a large trash dump located in hawaii

At which point on the diagram do convection currents occur to drive plate movement?