In the Soil Profile Below, Iron Is Present in Both

question 16

Multiple Choice

In the soil profile below, iron is present in both the top and bottom later, as labeled, but why is only the second layer a reddish color?

• A)The iron oxide was leached from the top layer in what was most likely a wet environment.
• B)The iron oxide was leached from the top layer in what was most likely an arid environment.
• C)When exposed to air, the iron oxide loses its reddish tint in what was most likely a wet environment.
• D)When exposed to air, the iron oxide loses its reddish tint in what was most likely an arid environment.

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Definitions:

Flexed

Bent or tensed, often referring to a muscle position.

Fibula

A long, thin bone located on the lateral side of the tibia in the lower leg, important for stabilizing the ankle and supporting muscles.

Ulna

A bone in the forearm that runs from the elbow to the smallest finger, and when in anatomical position, it is found on the medial side of the forearm.

Tibia

The shinbone or larger and stronger of the two bones in the lower leg, extending from the knee to the ankle.