The iron in iron-rich red soils may not be in a form that can be taken up by tree roots. As a result, leaves and needles may look yellow. Some trees release acids that convert iron in soil to a usable form. This change in soil chemistry is a type of which process?
A B C D
deposition weathering precipitation photosynthesis
Question: The iron in iron-rich red soils may not be in a form that can be taken up by tree roots. As a result, leaves and needles may look yellow. Some trees release acids that convert iron in soil to a usable form. This change in soil chemistry is a type of which process?
(A) deposition
(B) weathering
(C) precipitation
(D) photosynthesis

Answer: (B) weathering
Answer: (D) photosynthesis
Question: The iron in iron-rich red soils may not be in a form that can be taken up by tree roots. As a result, leaves and needles may look yellow. Some trees release acids that convert iron in soil to a usable form. This change in soil chemistry is a type of which process?
(A) deposition
(B) weathering
(C) precipitation
(D) photosynthesis
Answer: (B) weathering