Disasters
Q: Why do plate tectonics cause earthquakes?
A: As the tectonic plats bump into eachother, pull apart or grind past eachother they creat amounts of pressure. This vast ammount of pressure realased in either small or very large jolts and creates the vast disruptances we know to be earthquakes.
Q: How do convergent plat bondaries create volcanos?
A: When two plates collide, one plate (the heavier, denser plate) is subducted beneath the other plate. This plate contains volatiles, such as water. As the subducting plate is buried, it heats up, and the volatiles contained within the crust evaporate into the mantle above. The mantle is not molten in most places, as many people believe. Instead, it is solid but slightly flexible, like frozen cookie dough. When volatiles are added to the mantle, its melting temperature is decreased, and that area melts. This melted portion of mantle is lower in density, and rises through the overlying mantle to the surface, where it erupts in the form of a volcano.
Read more: http://wiki.answers.com/Q/Why_do_most_convergent_plate_boundaries_have_volcanoes#ixzz1AKYRnEd6
A: As the tectonic plats bump into eachother, pull apart or grind past eachother they creat amounts of pressure. This vast ammount of pressure realased in either small or very large jolts and creates the vast disruptances we know to be earthquakes.
Q: How do convergent plat bondaries create volcanos?
A: When two plates collide, one plate (the heavier, denser plate) is subducted beneath the other plate. This plate contains volatiles, such as water. As the subducting plate is buried, it heats up, and the volatiles contained within the crust evaporate into the mantle above. The mantle is not molten in most places, as many people believe. Instead, it is solid but slightly flexible, like frozen cookie dough. When volatiles are added to the mantle, its melting temperature is decreased, and that area melts. This melted portion of mantle is lower in density, and rises through the overlying mantle to the surface, where it erupts in the form of a volcano.
Read more: http://wiki.answers.com/Q/Why_do_most_convergent_plate_boundaries_have_volcanoes#ixzz1AKYRnEd6