Ireally need explain how metamorphic rocks are formed, and explain the difference between regional and contact metamorphism? why are the volcanoes on the hawaiian islands northwest of the big island of hawaii no longer erupting? use the terms radiation, conduction, and convection to explain how a pot of water boils? why is a minimum of three seismic stations needed to find the epicenter of an earthquake? answer all of them or just one, your : ) 

1. The metamorphic rocks are produced when the parent or the pre-existing rocks (whether sedimentary, igneous, or even metamorphic) are changed by pressure, heat, and the chemical activity of the fluids.  

When the prime changing factor is heat, generally due to direct contact, it may go through fundamental modification in recrystallization and texture is known as contact metamorphism. While regional metamorphism takes place when the minerals and texture of the rock are modified by pressure and heat.