Question

Which phrase describes two processes that scientists think move the earth's lithospheric plates?
Responses

1) friction between the plate and the asthenosphere and pressure of magma on the edge of the plate

2) gravity acting on the edges of plates and friction between the plate and the asthenosphere


3) convection in the mantle and pressure of magma on the edge of the plate


4) gravity acting on the edges of plates and convection in the mantle

Answer 1

The phrase that describes two processes that scientists think move the earth's lithospheric plates is:

**4) gravity acting on the edges of plates and convection in the mantle.**

This combination highlights the roles of gravitational forces (such as slab pull) and the convection currents in the mantle that contribute to the movement of tectonic plates.