Air pressure at 5500 m (18,000 ft.) is ________ (percent) of that at sea level
A) 0
B) 10
C) 30
D) 50
D
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Which of the following is not considered a mass wasting event?
A. An avalanche that consists of ice, snow, trees and rocks. B. A lahar or volcanic ash mixed with melt water from a volcanic eruption. C. Material that is saturated with water that breaks loose and flows down the hill slope. D. A rock that falls off a cliff onto a roadway. E. All of these choices are correct.
Machinery and transportation equipment accounted for the largest single proportion of exports in 2007 (43%)
Indicate whether the statement is true or false
All metamorphic rocks have a foliated texture.
Answer the following statement true (T) or false (F)
Scientists have direct evidence of the Earth's structure to
A) the inner core. B) the upper mantle (~250 km (155 mi)). C) about 2 km (1.2 mi) from the surface. D) 10 km (6 mi) from the surface, based on the deepest well shaft.