Will mark brainliest! : ) why do scientists study deuterium to determine the origins of water on earth? a. deuterium reacts with oxygen to form water just like hydrogen does. b. deuterium only comes from outside the planet. c. deuterium has a neutron in its nucleus, whereas hydrogen does not. d. deuterium is easier to study than ordinary hydrogen. explain your answer! : ) !

Humid continental climate is found in the interior of continents between the 30 and 60 degrees latitude, but usually above the 40 degree line.   40 degrees north of the equator means less direct sunlight and therefore less warmth.   this climate is mainly found in the northern hemisphere since there are no major landmasses in the southern hemisphere.  if you live in northern indiana, you know all about humid continental because that is the climate type you have!