How was the Salt Pan at Death Valley created? What is the name of such a desert feature?
A) Stream erosion; wadi
B) Precipitation; nullah
C) Evaporation; playa
D) Chemical reactions; ephemeral
Answer: C
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Proterozoic layered igneous intrusions are the world's major sources of chrome and platinum
Indicate whether the statement is true or false
One example of a vesicular felsic rock is ____
A)pumice B)basalt C)obsidian D)granite E)mica
"A rising sea temperature results in a higher sea level." Evaluate this statement
A) It is false; more evaporation occurs at higher temperatures. B) It is true; materials expand at higher temperatures. C) It is true; the large quantity of glacier ice that melts when the sea temperature is higher. D) It is false; when the sea temperature is higher, more water is returned to the continents.
An increase in pore water pressure in slope materials will tend to:
a. increase the driving forces and lower the factor of safety b. decrease the resisting forces and lower the factor of safety c. decrease the driving forces and raise the factor of safety d. decrease the resisting forces and raise the factor of safety