Question

heat generated from the radioactive decay of elements deep in the interior of the earth creates magma or molten rock. in the upper mantle, the deep, hot magma becomes less dense than the cooler, upper mantle rocks and the magma rises, while the cooler rocks sink. this movement of the warmer and cooler mantle creates pockets of circulation within the mantle called _. which drives the movement of tectonic plates.
a. magma currents
b. density currents
c. convection currents
d. conduction currents

Explanation:

The movement of tectonic plates is driven by convection currents in the mantle. Heat from radioactive decay in the Earth's interior causes the mantle to become hot and less dense, rising, while cooler, denser mantle material sinks, creating a cycle of movement known as convection currents.

Answer:

B. convection currents