Earthquakes and Volcanoes! Study all terms of earthquakes and volcanoes here... learn the theories of continental drift, seafloor spreading, and plate tectonics as well... Tools See a list of terms used in these activities. Matching Flashcards (Java / non-Java) Concentration Activities created by: Carolyn Medler This activity was created by a Quia Web subscriber. To learn how to make your own, just like this, click here.