Ancient climate is known as
A) the Little Ice Age (LIA).
B) the Medieval Warm Period (MWP).
C) paleoclimate.
D) weather.
Answer: C) paleoclimate.
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From quartz's hard physical property, what can be inferred of its bonding structure?
A) an interlocking three-dimensional framework of evenly spaced groups B) an interlocking three-dimensional framework of unevenly spaced groups C) two-dimensional sheets of hexagonally bonded groups, loosely bonded between sheets D) rhombically shaped ionic bonds between groups with even cleavage planes
Which of the following is true?
A) Zoos and gardens can replace most important species because breeding technologies are improving. B) Restoration ecology can completely restore any damaged ecosystem. C) When we damage ecosystems we lose both biodiversity and valuable ecosystem services. D) Our understanding of genetics allows us to replace extinct species. E) Humans can find and make their own resources if they destroy natural ecosystems.
Why are maritime air masses from the north Atlantic of only limited concern for weather in the U.S.?
A) They never cause severe storms. B) Polar fronts block these air masses from the U.S. C) Temperatures are usually mild over this region. D) Question is incorrect; these air masses are very important. E) Prevailing winds move them away from the U.S.
On ____, the equator receives direct rays from the sun
a. September 22 b. March 21 c. September 22 and March 21 d. none of these