The cellular process in which materials are move across a membrane from an area of low concentraction to an area of high concentration is called?

You are describing Osmosis. The low concentration tends to move through a membrane to a higher concentration in order to attempt to equalize the concentrations on both sides of the membrane.

imagine a line passing through the center of earth that goes through both the north pole and the south pole. this imaginary line is called an axis. earth spins around its axis, just as a top spins around its spindle. this spinning movement is called earth's rotation. at the same time that the earth spins on its axis, it also orbits, or revolves around the sun. this movement is called revolution.