Earth science is known as plate tectonics. Plate tectonics might be thought of as the process by which the Earth is resurfaced. As the result of seafloor spreading, new crust and lithosphere is created by the flow of magma from the mantle to the near surface, through fissures, where it cools and solidifies. Through subduction, oceanic crust and lithosphere returns to the convecting mantle. Areas of the crust where new crust is created are called "divergent boundaries", those where it is brought back into the Earth are "convergent boundaries" and those where plates slide past each other, but no new lithospheric material
The Word for World Is Forest Word for World Is Forest" portrays a communication gap that the protagonists are never able to bridge. Both the native Athsheans and the loggers have languages that reflect their perceptions of reality, but they are unable to find a common language. In the native Athshean language, the word ""Athshe"" means both "forest" and "world", demonstrating the close link that the Athsheans have to the forest and their planet. It is noted by Lyubov that the Athsheans believe "the substance of their world was not earth, but forest". The language used by the Athsheans during conversations similarly show their interconnectedness and