Question

Marina is creating a flow chart of the mechanics of mantle convection and how it relates to tectonic plate movement. Which words should Marina place in each blank of the flow chart?

Answer 1

Hello there!

Here are the words given to complete the flow chart:

A. asthenosphere, ridge push, subduct

B. magma, slab pull, subduct

C. lithosphere, ridge pull, float

D. magma, ridge push, subduct

The answer is A. asthenosphere, ridge push, subduct.

• The asthenosphere is the plastic layer (specifically, lower upper mantle) that allows the lithosphere (upper upper mantle + crust) to slide allowing plates to move.

• The ridge push is the force that allows mid-ocean ridges to form in diverging plate boundaries.
• Subduct or subduction is the process where plates of different density collide at converging plate boundaries so the denser plate sinks or subducts.

I hope this will help you!

**Also, it would be great if you could provide the flow chart.

Answer 2

There are number of theories have to explain the moment of the tectonic plates. And it can be placed anywhere.

So the astrosphere can be just inner part of a mantle.

And it can come after the sub duct lithosphere.

So the rodge can be push as a result of mental.

It is called as slab pull.

So the trench can occurs.