Which of the following is not a characteristic of the geologic timeline?
A. Major subdivisions are equally spaced through geologic time.
B. Subdivisions are based on when certain species became extinct.
C. Subdivisions are based on when certain species evolved.
Answer: A
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As Heezen and Tharp interpreted the ocean depth data, they identified what unusual feature that hinted at continental drift?
a) The oceanic ridges have a cleft, or rift, in the middle rather than a peak. b) The oceanic ridges have a broad, flat top very much resembling a table top. c) Ocean ridges are unique to the Pacific Ocean. d) They discovered a chain of very tall volcanoes in the middle of the Atlantic Ocean that do not rise higher than the sea surface. e) Ocean ridges abruptly stop after a few hundred kilometers and then start again after a few hundred more.
A probable interpretation of migmatites is that they represent:
a. sequences of basalts metamorphosed at mid-oceanic ridges b. zones of low-level metamorphism of sedimentary rocks over large areas c. zones of high-level metamorphism of sedimentary rocks produced by plate collisions d. transitional zones containing mixed igneous and metamorphic rocks located between granitic batholiths and regionally metamorphosed rocks
When groundwater recharge is less than discharge it can cause land subsidence to occur.
Answer the following statement true (T) or false (F)
Global warming is causing sea level to rise for two separate reasons. What are they?
What will be an ideal response?