The Heterosphere Is the Layer of the Atmosphere in Which

Multiple Choice

The heterosphere is the layer of the atmosphere in which the gases are _______ because of _______.

A) well mixed; thermal motions (i.e.,convection)
B) well mixed; the influence of gravity which causes gases of different weight to diffuse randomly
C) poorly mixed; the influence of gravity which causes gases of different weight to separate into layers
D) poorly mixed; thermal motions (i.e.,convection)