Where do we find potholes, and how do they form? Why do they pose a hazard to humans?

What will be an ideal response?


ANSWER: Potholes are found in steep, rock-bound stream canyons where turbulent flow swirls rocks in whirlpools. Larger rocks caught in such turbulent eddies carve away at the bedrock, gradually drilling a cylindrical hole. Many people swim in potholes, but this is dangerous because of extreme turbulence and vortexes that render flotation devices ineffective.?

Environmental & Atmospheric Sciences

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What kind of drainage pattern has developed around the outside of the Okmok Caldera?

The question is based on Map T-2, the “Umnak, Alaska” topographic map (scale 1:250,000; contour interval 200 feet). What will be an ideal response?

Environmental & Atmospheric Sciences

The main direction in which groundwater flowed in the Investigation area was to the

A) north. B) east. C) south. D) west.

Environmental & Atmospheric Sciences

The world's population of urban settlements exceeded that of rural settlements for the first time in ________

A) 1990 B) 1995 C) 2000 D) 2001 E) 2008

Environmental & Atmospheric Sciences

Sea breezes reach their maximum on shore wind speeds ________.

A. during the hottest part of the day B. shortly after sunset C. shortly after sunrise D. at random times during a 24-hour period

Environmental & Atmospheric Sciences