The heterosphere is the layer of the atmosphere in which the gases are ________ because of ________.
◦ well mixed; thermal motions (i.e., convection)
◦ well mixed; the influence of gravity which causes gases of different weight to diffuse randomly
◦ poorly mixed; thermal motions (i.e., convection)
◦ poorly mixed; the influence of gravity which causes gases of different weight to separate into layers