Observed in a vertical cross section, soil is made up of distinct layers. From the surface downward, the layers are designated ____.
A)O, E, A, B, and C
B)A, B, C, O, and E
C)O, A, E, B, and C
D)A, O, E, B, and C
E)E, A, B, O, and C

Question

Quizplus · Accepted Answer

The correct sequence from the surface downward is O (organic layer), A (topsoil), E (eluviated layer), B (subsoil), and C (parent material). This sequence reflects the general order of soil horizons in a well-developed soil profile.

Observed in a Vertical Cross Section, Soil Is Made Up