If a sediment is white in color, it is likely to be:
a. undergoing oxidation.
b. terrigenous in origin.
c. biological in origin.
d. a nodular sediment
ANS: C
The color of sediments can offer a great deal of information. White usually indicates biological
origins, but sediments can range from reds to greens. Information can be found in the section
Sediments Vary Greatly in Appearance.
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The basic types of faults include:
a. Normal fault b. Reverse/Thrust fault c. Strike-slip fault d. All of the above
In the chemical weathering–CO2 feedback, as chemical weathering increases, ____
a. the amount of CO2 in the atmosphere stabilizes b. the amount of CO2 in the atmosphere decreases c. the amount of CO2 in the atmosphere increases d. Earth’s climate begins to warm e. more water vapor evaporates from the oceans
Emergent vegetation such as cattails and reeds grow in the ________ zone of a lake
A) benthic B) limnetic C) littoral D) aphotic E) profundal
The challenge of preserving biodiversity,
A. any nation itself can reduce emissions to solve global warming. B. any nation acting alone can protect biodiversity around the world. C. includes the full spectrum of animal and plant genetic material. D. a nation can protect biodiversity within its own borders and c.