Describe plate tectonics and how it forms geographic features on Earth such as mountains, volcanoes, ridges, or rifts?

The plate tectonics shifts by converging upwards causing mountains, volcanoes, etc.

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