Question

Convection currents occur when materials become heated and less dense -- they become buoyant. Buoyant materials, such as continents or hot rocks or hot water or hot air:

A) Tend to float on denser material or to rise up through denser rock or water or air.
B) Tend to resist any kind of motion.
C) Tend to sink into denser materials.

Answer 1

Answer: Tend to float on denser materials or rise up through denser rock or water or air

Explanation: buoyant materials like the crust are known to float on denser mantle. Also hot water will necessarily rise to the top allowing cold water to travel to the bottom