The seismic-reflection profile can be used in the modern search for oil, because it helps to construct an image of the configuration of underground rock layers.
a. true
b. false
Ans: a. true
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radiation from the Earth is mostly absorbed in the lower troposphere and ______ back towards.
a - scattered b - convected c - conducted d - reradiated e - reflected
Which method of movement is most important to glaciers?
a. glacial retreat b. plastic flow c. isostatic rebound d. incremental advancement e. creep
Humans have dramatically altered the rate of nitrogen fixation into forms usable by autotrophs ________
A) by producing synthetic fertilizers and applying them to crops, lawns, and parks B) due to the burning of fossil fuels to meet our energy needs C) because of the erosion of farmlands through poor agricultural practices D) by using antibiotics to reduce the numbers of denitrifying bacteria E) by selectively removing leguminous plants
Given all other conditions are the same, ground water flows faster if ________.
A. it is flowing through finer-grained materials B. it is colder C. it is flowing through deeply buried material D. it is flowing in response to a greater hydraulic gradient E. it is saturated with dissolved solids