Plate Tectonics Plate Tectonics is theory of global tectonics that has served as the master key in modern geology for understanding the structure, history, and dynamics of the earth's crust. The theory is based on the observation that the earth's solid crust is broken up into a dozen semirigid ...

The Grapes of Wrath is a novel by John Steinbeck that exposes the desperate conditions under which the migratory farm families of America during the 1930's live under. The novel tells of one families migration west to California through the great economic depression of the 1930'...