In general, the healthiest soil texture for plants is one in which
A) sand dominates, clays are next highest in concentration, and silt has the smallest concentration.
B) clay dominates, sands are next highest in concentration, and silt has the smallest concentration.
C) sand dominates, silts are next highest in concentration, and clay has the smallest concentration.
D) there is a relatively even percentage of sand, silt, and clay.
D) there is a relatively even percentage of sand, silt, and clay.
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Light that is blue shifted has wavelengths that are
A. contracting. B. out of phase. C. inverted. D. lengthening.
In which city is Polaris highest in the sky?
A. Anchorage B. Mexico City C. Denver D. Singapore E. all the same, depending on the time of night
The greatest annual number of thunderstorms in the United States occurs in ____
A) the Ohio valley B) the Central Plains C) Florida D) Texas
Hydrogen bonding plays an important role in which of the following?
A) the boiling point of water B) the expansion of water upon freezing C) both a and b D) neither a nor b