Which of the following best describes the process that resulted in the Valles Marineris on Mars?
A) Stream erosion carved a deep central valley.
B) A comet skimmed across the surface of the planet.
C) Down-faulting created grabenlike valleys.
D) A violent volcanic eruption blasted out a long caldera.
Answer: C
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"Water stress" is a situation in which disruptive water shortages can frequently occur.
Answer the following statement true (T) or false (F)
The core of the Earth is composed primarily of: a. nickel
b. uranium. c. metallic hydrogen. d. iron.
Vent communities have been discovered making use of many energy sources, including all of the following except ________.
A. cold seeps B. salt seeps C. methane seeps D. hydrothermal vents E. radioactive seeps
One of the most important patterns of migration in Southwest Asia & North Africa is rural-to-urban migration
Indicate whether the statement is true or false