Answer;
The above statement is false.
Explanation;
-The correct statement would be; the mantle material rises in convection currents because heated materials become less dense.
-Convection currents are the result of differential heating. Lighter (less dense), warm material rises while heavier (more dense) cool material sinks. It is this movement that creates circulation patterns known as convection currents in the atmosphere, in water, and in the mantle of Earth.