A comet is visible because ________
A) it is a very large object that get stretched out by interaction with the Sun's gravity
B) it is composed of white material, mostly ice
C) it is a small object, but it ejects gas and dust that at is dispersed by the solar wind to form a tail thousands of km long
D) it boils off steam that streams outward along the comet's path
C
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Which has a higher population density (2010 data)?
A. Boston, MA, Population: 0.63 million, Area: 48 square miles B. Dallas, TX, Population: 1.22 million, Area: 340 square miles C. Houston, TX, Population: 2.15 million, Area: 634 square miles D. San Diego, CA: Population: 1.33 million, Area: 325 square miles
Bioaugmentation is the concentration of toxic substances in the flesh of marine organisms at higher levels in the food
chain. a. True b. False
The equinox
A) occurs four times during the year. B) has 12 hours of day and 12 hours of night for all locations. C) is the longest day of the year at any given place. D) is when the subsolar point is at one of the tropics.
Which of the following would not be a part of new urbanism?
A) encouraging compact developments embedded in natural landscapes B) promoting mix land uses C) razing buildings and neighborhoods that are "old" D) creating walk able neighborhoods E) encouraging community neighborhoods