Exam 2: Formation of Soils From Parent Materials

Weathering of rocks usually is most intense in the center of a rock fragment,and gradually decreases toward the outside.

Sandstones are good examples of metamorphic rocks.

Residual parent materials are best described as __________.

Which of the following statements is not correct?

If you wanted to find a soil where physical weathering dominated over chemical breakdown you would be most apt to find it in ______.

The presence of iron in a mineral generally increases its resistance to chemical breakdown.

The A horizons are more apt to be cultivated than the E horizons.

Residual parent materials have generally been subjected to weathering for a longer period of time than have lacustrine or alluvial parent materials.

Granite is an example of a(n)________.

Hydrolysis involves the splitting of water into its H⁺ and OH^- components while hydration attaches intact water molecules to a compound.

Igneous rocks are formed when molten magma cools and solidifies.

Organic matter accumulation is most pronounced in the ____.

In which of the following horizons has the process of illuviation most likely occurred?

Iron and aluminum oxides are major components of igneous rocks.

Which of the following is not a secondary mineral?

Sapric and fibric are terms used to describe peat parent materials.

Residual parent materials have formed in place and have not been transported from one area to another.

Silicate clay accumulation is most common in the ____.

The reaction: mica + H₂O $\rightarrow$ K⁺ + OH^- + acid clay is an example of ________.

Which of the following statements is correct?