Of the requirements needed for the evolution of life, the most rare is
A) an abundant energy source.
B) a long duration of time.
C) having the right elements.
D) the presence of water.
D
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Although carbonate rocks most often interact with carbonic acid, the following substance has also been found to sometimes play a role in rock dissolution?
A) Nitric acid B) Dolomite C) Radioactive uranium D) Radon E) Sulfuric acid
The Wilderness Act passed in 1964 allows the government to
a. take legal action against environmental degradation in wildlife preserves b. protect native species c. protect undeveloped tracts of public land d. protect national parks and reserves e. rotate usage of wildlife areas
Natural levees block yazoo streams from joining the main river on a flood plain
Indicate whether the statement is true or false
At a mid-ocean ridge spreading center, what happens?
a. the plates are moving past each other b. the plates are moving away from each other c. the plates are moving toward each other d. one plate is being subducted beneath another e. both plates are being subducted