Trenching across an active fault ____.
A)releases pressure along the fault
B)allows geologists to find evidence of previous earthquakes
C)allows structures to be built to stop faulting activity
D)diminishes the intensity of earthquakes
E)produces secondary faults that reduce pressure on the major fault
Question 2The increasing percentage of heavier elements in the universe results from nuclear fusion during the evolution of ____________________.
Fill in the blank(s) with correct word
Question 3In contrast to continental crust, oceanic crust is ____.
A)granitic
B)less dense
C)thicker
D)complex
E)simpler
Question 4The basic force that is the attraction of one body toward another is ____________________.
Fill in the blank(s) with correct word
Question 5Beneath some valleys in East Africa and in a large area called the Basin and Range Province in the western United States and northern Mexico, the crust ____.
A)appears to be in the initial stages of rifting
B)appears to have undergone numerous earthquakes in the last 1000 years
C)is much thicker than it is in the surrounding areas
D)is composed mostly of basalt
E)is composed of fragments of extinct volcanoes
Question 6A combination of related parts that interact in an organized fashion is a(n) ____________________.
Fill in the blank(s) with correct word
Question 7What unifying theory of geology holds that large segments of Earth's outer part move relative to one another?
A)lithospheric zone theory
B)convection cell theory
C)subduction zone theory
D)plate cycle theory
E)plate tectonic theory
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