What principal factor determines if a star becomes a white dwarf, a neutron star, or a black hole?
A. Mass.
B. Luminosity.
C. Density.
D. Temperature.
Answer: A
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Absolute zero equals:
A) -273°C. B) 273 K. C) 0°F. D) 0°C. E) -400°F.
In the short-range weather forecasts of this chapter, we assumed that the pressure systems and fronts were ____
a. moving at a constant rate b. accelerating along a random curve c. stable and unchanging d. moving towards zero e. exactly identical
What is meant by carbon sequestration?
A. Carbon is released from melting permafrost. B. Carbon is removed from the surface environment and placed in storage. C. Excessive amounts of carbon dioxide are released into the atmosphere by volcanic activity. D. Heat is absorbed by atmospheric carbon dioxide.
Which of the following is a valid statement with relevance to groundwater?
A. Fractures are the main way groundwater moves through some rocks, such as granite. B. Most groundwater occurs in underground rivers. C. Most groundwater occurs in underground lakes. D. In most sediments, adjacent grains fit tightly together. E. All of these choices are correct.