English to Russian Social Sciences Geology Structure of Earth

It is believed that molten materials at the center of the Earth are in constant motion, similar to the wax in a lava lamp. The material near the center moves up, cools, then sinks. Portions of the molten rock succeed in forcing their way through cracks in the sea floor, constantly creating new sea floor surface as it cools. The brittle crust of the Earth is forced away from this new surface at about five centimeters per year.