The main reason why the tectonic plates move is the conversational currents. There is magma between the upper mantle and the asthenosphere that heats up at the upper mantle. The weight is so small that the magma rises with the help of these conversational currents. When the magma has ascended towards the asthenosphere, it has nowhere to go so the magma lies along the asthenosphere. There the magma cools down again because the asthenosphere is colder than the upper mantle, which makes the magma heavier and goes back down to the upper mantle, where the magma heats up again and everything starts all over again and so it goes on over and over again. Scientists have concluded that the earth's gravity causes two other processes that also cause the tectonic plates to move.
Ridge push - in the spreading zones, the sides of the tiles are raised and slide to the side as in a slide.
Slab pull - when a plate is pulled down by gravity in a subduction zone like an anchor.
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Answer:
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Explanation:
Most of Japan's people live on plains and lowlands found mainly along the lower courses of the country's major rivers, on the lowest slopes of mountain ranges, and along the sea coast. This concentration of people makes Japan one of the world's most crowded countries. Densities are especially high in the urban corridor between Tokyo and Kobe, where 45 percent of the country's population is packed into only 17 percent of its land area. An ethnically and culturally homogeneous nation, Japan has only a few small minority groups and just one major language Japanese.
