What element do astrobiologists consider to be the most essential for the evolution of life?
A) carbon
B) silicon
C) oxygen
D) hydrogen
A
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Which of the following locations would contain a wide variety of sediment, from large angular blocks to fine rock powder, produced from grinding of the rocks?
A) Location 1, along the margins of a glacier
B) Location 2, along a steep mountain front
C) Location 3, in sand dunes
D) Location 4, along a beach
E) Location 5, on relatively deep seafloor
A bat’s wing and a bird’s wing are examples of analogous structures
a. True b. False
Heterogeneous nucleation:
A) cannot occur in the presence of hygroscopic particles. B) can only occur at humidities in excess of 100 percent. C) results in a water droplet that is 100 percent water. D) requires condensation nuclei.
The U.S. government has encouraged the use of cars in part by
A) building interstate highways. B) charging high gasoline taxes. C) constructing new subways. D) protecting prime agricultural land. E) giving tax credits to automobile owners.