Question

explaining convection currents
which statement explains how convection currents affect the movement of plates?
gravity pulls one edge of a plate down into the mantle, which causes the rest of the plate to move as well.
heat from earth’s interior causes lithospheric plates to collide at convergent plate boundaries, causing volcanoes.
heat from earth’s interior causes currents of hot rising magma and cooler sinking magma to flow, moving the crust along with them.
as convection currents drift across the oceans, they bring the pieces of earth’s crust with them as the supercontinent breaks apart.

Explanation:

To determine the correct statement, we analyze each option:

• The first option describes slab pull (gravity - related), not convection currents.
• The second option focuses on plate collisions and volcanoes, not the mechanism of how convection currents move plates.
• The third option correctly explains that heat from Earth's interior creates convection currents in the mantle (hot magma rises, cooler sinks), and these currents move the lithospheric plates (crust) along with them.
• The fourth option incorrectly states that convection currents drift across oceans; convection currents occur in the mantle, not the oceans.

Answer:

Heat from Earth’s interior causes currents of hot rising magma and cooler sinking magma to flow, moving the crust along with them.