Question

using table 2, the convection cells that you would draw at the surface would have
number 14: table 2: cross section along the front of the terrain
on the gray front of the terrain below, sketch in your interpretations of the geometry of plates, such as a subduction zone or mid - ocean ridge (show the convection cells). use figures from the book as a guide for how to draw in the different types and thicknesses of crust and lithosphere.
three mid - ocean ridges where magma rises and one subducting oceanic trench where basalt sinks
one mid - ocean ridge where magma rises and, to the left and the right, subducting oceanic trenches where basalt sinks
two mid - ocean ridges where magma rises and two subducting oceanic trenches where basalt sinks
one mid - ocean ridge where magma rises and one subducting oceanic trench where basalt sinks
one mid - ocean ridge on the left and one mid - ocean ridge on the right where magma rises, and, one subducting oceanic trench where basalt sinks

Explanation:

Convection cells in the context of plate - tectonics involve magma rising at mid - ocean ridges and sinking at subducting oceanic trenches. Based on the principles of plate movement and convection in the mantle, we analyze the number of ridges and trenches.

Answer:

We need to consider the balance of forces in plate tectonics. Magma rises at mid - ocean ridges creating new crust, and basalt sinks at subducting oceanic trenches. Typically, for a balanced system in a cross - section, we can have one mid - ocean ridge where magma rises and, to the left and the right, subducting oceanic trenches where basalt sinks. So the answer is: One mid - ocean ridge where magma rises and, to the left and the right, subducting oceanic trenches where basalt sinks.