Spacefaring Suzie places herself exactly halfway between the Earth and the Moon. She tends to fall toward the
A. Earth.
B. Moon.
C. neither.
D. vastness of space.
Answer: A
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Which of the following gases varies the most from place to place and from time to time in the lower atmosphere?
A. ozone B. water vapour C. carbon dioxide D. methane
The following equation is what type of chemical reaction? 2 KalSi3O8(s) + 11 H2O --> 2 K+(aq) + 2 OH-(aq) + 4 H4SiO4 (aq) + Al2Si2O5(OH)4(s)
A) acid-base B) dissolution C) oxidation D) hydrolysis
Which statement about the danger of volcanoes in the Pacific Northwest is most accurate?
a. ?The Mt. St. Helens eruption of 1980 assures that the volcano will not be a threat for several decades. b. ?Mt. Rainier poses a greater threat than other High Cascades volcanoes due to the large population living at its base. c. ?Mt. Shasta is the most dangerous volcano in the region since it has not erupted in a long time. d. ?Mt. Hood is very close to the Seattle-Tacoma metropolitan area and would destroy much of these cities in an eruption. e. ?Mt. Baker has been the most frequent site of eruptions in the past and therefore is the greatest current danger.
What is true about unanchored sand dunes?
A. Wind erosion occurs on the leeward slope. B. Wind deposits sand on the leeward slope. C. Dunes move against the direction of wind. D. Wind erosion forms the dune’s slip face. E. Wind deposits constantly change dune shape.