What is distinct about the divergent boundary that forms a rift valley?
A. The rock type is not igneous.
B. It coincides with mantle advection.
C. It develops within a continent.
D. It coincides with mantle subduction.
E. The rock type is not sedimentary.
Question 2What type of plate boundary creates midocean ridges?
A. advective
B. convergent
C. divergent
D. transform
E. strike-slip
Question 3What process in the mantle is responsible for the creation of midocean ridges and seafloor spreading?
A. convection
B. conduction
C. subduction
D. advection
E. isostasy
Question 4The iron content in oceanic rock allows geologists to determine its age. What term describes this approach and other findings?
A. sea floor spreading
B. paleontology
C. oxygen-isotope analysis
D. paleomagnetism
E. continental drift
Question 5What is NOT an aspect of the theory of plate tectonics?
A. Seafloor spreading results from rising magma.
B. Midocean ridges have the newest-formed crust.
C. Subduction zones are where crust is re-melted.
D. Deep ocean trenches are tectonically inactive.
E. Earthquakes match oceanic trenches and ridges.
Question 6What was NOT evidence that Wegener presented for his Continental Drift hypothesis?
A. fit of African and South American continents
B. similar rock records on both sides of the Atlantic
C. matching mountain belts around the Atlantic
D. similar fossils found on both sides of the Atlantic
E. seafloor spreading pulling apart the continents
Question 7What is NOT true about geologic time?
A. can be observed in a human lifetime
B. characterized as vast periods of time
C. contextualizes operation of geologic processes
D. related to the uniformitarianism concept
E. timescale begins with the formation of Earth
Question 8What concept is summarized as the present is the key to the past?
A. isostasy
B. geomorphology
C. catastrophism
D. conformalism
E. uniformitarianism
Question 9What is an example of an internal process?
A. sediment transported by runoff
B. rock material weathered by rain
C. sand removed by powerful winds
D. ocean waves causing cliff collapse
E. folding of crust near a fault line
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