When two different air masses collide, a is formed. wall boundary front zone?

Front.

Explanation:

A front is a type of wall that id formed by the interaction of the two contrasting air masses of different nature and hence the cold air mass settles down due to the heavyweight or density and the warmer air mass goes upwards.  Due to being lighter in weight and hence form what is known as the front when this front turns it turns in a cyclic manner in a clockwise direction and hence the formation of front cycle or the cyclone

Mantle convection is the process that drives plate tectonics. the theory of plate tectonics states that the crust is divided into plates that float on the semi molten mantle below. the circular motion of the magma as it slowly rises and falls or move though convection cells drags the plates along causing them to move. the heat source in the lamp would represent the earth's core. the core is the source of energy that drives convection in the mantle. the lava represents molten magma under the earth's surface. if the lava lamp had floating pieces they would move as the circular motion of the lava in the lamp as it rises and falls would move them along the surface. these floating pieces would represent pieces of the earth's crust.