Why igneous materials found along oceanic ridges contain magnetic iron particles that show reversal of magnetic orientation. this is evidence that

Over time, the magnetic fields change...this takes a lot of time, and isn't very noticeable, but scientists have observed it in volcanic rock over the years. They slowly change poles.

So  if  the sum of the enthalpies of the reactants is greater than the products, the  reaction  will be  exothermic.  if  the products side has a larger enthalpy, the  reaction  is  endothermic. you may wonder why  endothermic reactions, which soak up energy or enthalpy from the environment, even happen

Answerstratovolcanoes///near or in the ring of fire;