The Peru-Chile trench is moving over the ________ Plate as South America moves west.
A. Antarctic
B. Australian
C. Nazca
D. South American
E. North American
Answer: C
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A certain lake in the arid west contains an endangered species of fish. The legal status of this fish required water diversions out of the river feeding the lake to be decreased substantially
About 10 years following this decree, the declining cottonwood forest and canopy along the riverbanks was noted to be recovering. This situation illustrates the potential effectiveness of a. the species approach to sustaining biodiversity b. the ecosystem approach to sustaining biodiversity c. cottonwood trees as part of all stream recovery programs d. water as a solution to species decline e. fish as indicator species
Oil shales and tar sands contain trillions of barrels of oil that are chemically locked in the formations
Indicate whether the statement is true or false.
Carbon dioxide is an example of a(n) ____
a. element b. atom c. compound d. polar molecule e. proton
Earth's rotational axis is inclined ____ from being perpendicular to the plane of the ecliptic
a. 32 ½ degrees b. 63 ½ degrees c. 66 ½ degrees d. 23 ½ degrees