Vitreous luster is characteristic of:
a. pyrite
b. limonite
c. quartz
d. galena
c
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Under what conditions is swidden cultivation sustainable?
A) when population densities remain low, and where upland people control enough land B) when there is a large number of people to do the hard, manual labor associated with swidden C) when private entities purchase land for development D) when the government intervenes to control land use E) when long-term weather patterns provide adequate moisture and warmth
Subtropical high-pressure systems migrate with the summer Sun, fluctuating about 5° - 10° in latitude
Indicate whether the statement is true or false
What was Hubble's major contribution to Cosmology?
A) He measured the size of the universe. B) He identified Cepheid Variable stars. C) He developed a new method for measuring the absolute magnitude of stars. D) He identified numerous new galaxies outside the Milky Way. E) He proved the Big Bang Theory.
City A has an air pressure of 1,000 millibars. City B has an air pressure of 1,004 millibars. The distance between the two cities is 100 kilometers. The difference of 4 millibars over 100 kilometers is known as ________
A) wind B) force C) the pressure gradient D) velocity E) the Coriolis effect