How are the locations of earthquakes, volcanoes, and mountain ranges related to tectonic plate boundaries?
The theory of plate tectonics combines many of the ideas about continental drift (originally proposed in 1912 by Alfred Wegener in Germany) and sea-floor spreading (suggested originally by Harry Hess of Princeton University). Most Earthquakes and Volcanic eruptions happen on the boundaries. For answers to any questions you have just ChaCha again!