A Vertical Cross Section of Soil Extending from the Surface

question 60

Multiple Choice

A vertical cross section of soil extending from the surface to the deepest extent of plant root activity or to the regolith and bedrock is known as a

• A)pedon.
• B)soil profile.
• C)soil horizon.
• D)polypedon.
• E)regolith.

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Definitions:

Formic Acid

The simplest carboxylic acid, with the formula HCOOH, used industrially and as an antiseptic.

Ka

An equilibrium constant for the dissociation of a weak acid into its proton and conjugate base in solution; a measure of acid strength.

pKa

A measure of the acidity of a hydrogen atom in a molecule, indicating the tendency of the molecule to donate a proton.

Conjugate Acid

The species that is formed when a base gains a proton.