Instead, huge convection currents form and large bubbles of hot gas move up towards the surface (similar to a boiling pot of water that is heated at the bottom by a stove).
(huge convection currents; form; ) (large bubbles of hot gas; move; up; towards the surface (similar to a boiling pot of water) (water; is heated; L:at the bottom; by a stove)
huge convection currents large bubbles of hot gas water
form move is heated
up towards the surface (similar to a boiling pot of water
L:at the bottom by a stove