Horizontal lines that run parallel to the equator and are labeled with anN or S are called A longitude lines
B latitude lines
C prime meridians
D perpendicular lines

There is totally sun all the way down there.

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