What happens to mantle rock as it is heated by Earth's core?

It becomes less dense and rises.

It solidifies and stops moving.

It instantly melts into liquid magma.

Which statement best describes the overall process of a mantle convection current?

Rock is heated by the core, rises, cools near the surface, and then sinks.

Rock is cooled by the crust, sinks, is melted by the core, and erupts from volcanoes.

Tectonic plates collide, forcing rock down into the mantle where it melts.

The core's rotation spins the mantle, creating a whirlpool effect that moves the plates.

Gravitational pull from the moon

Chemical reactions in the crust

To transfer heat from the crust to the core

To generate the planet's magnetic field

To provide the main force that drives the movement of tectonic plates

To break down old rock and create new magma at the surface