This figure has rock units and geologic features that are assigned letters that are not in any order. From the geologic relations, what is the oldest unit or feature of those listed below?
A) The canyon (feature N)
B) Lava flow (unit L)
C) Dike (unit D)
D) Fault (feature F)
E) Old river channels (feature R)
D) Fault (feature F)
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Considering the world's currently spoken, standard languages, only the people of ________ would be able to communicate intelligibly with actual, historic Vikings
A) Iceland. B) Norway. C) Russia. D) Canada. E) Lapland. Answer: A
Which of the following is the name given to a discharge of electricity from or within a thunderstorm?
A. lightning B. static electricity C. St. Elmo's fire D. downburst
Why is water vapor not implicated in climate change as methane and carbon dioxide are?
A. The concentration of water vapor in the atmosphere has remained relatively constant despite changes in human activities. B. Water vapor is a liquid, not a gas, so it precipitates out of the atmosphere frequently. C. Water vapor is not a greenhouse gas. D. Carbon dioxide and methane are not just greenhouse gases, they are also toxic to most organisms.
Topography directly influences ecosystems by providing a limited number of microclimates within a small area
Indicate whether the statement is true or false