You discover an ancient reddish soil deposit buried beneath younger sediment and the modern soil. What horizon does it likely represent? What would you look for in this ancient soil to determine the ancient climate?
What will be an ideal response?
Reddish colors dominate in B horizons. If it is from a desert, there will be significant calcite present. If it is from a humid region, clays and hydroxides are abundant.
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The most important greenhouse gas for retaining a variety of outgoing longwave radiation is
A. N2O. B. H2O. C. CO2. D. CH4.
Match the seafloor terms to their correct definitions
A) Flat seafloor in the deep ocean B) Wedge of sediments deposited by turbidity currents that formed at the base of the slope C) Narrow creases in the seafloor that result from subduction D) Gently sloping, submerged extension of the continent E) A steep incline that marks the boundary between the continental crust and the oceanic crust 1) Continental shelf 2) Abyssal plain 3) Submarine trench 4) Continental rise 5) Continental slope
Which of the following is(are) consumed in the process of converting glycerol to dihydroxyacetone phosphate?
A) ATP B) NAD+ C) both a and b D) neither a nor b
If an atom has an equal number of electrons and protons, it would be considered ________
A) electrically neutral B) electrically positive C) electrically negative D) metallic