Volcanic eruptions that occur as a result of continental shifting are typically found where

Volcanic eruptions that occur as a result of continental shifting are tpyically found at the points where there are thining of the earth crust and divergement of the tectonic plates. Basically, volcanic eruptio occurs at two types of plate boundaries: at the middle ocean ridge and at subduction zones.

Its in the national history museum and you can't se the original because its locked away in a vault 

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