What soil horizon is the surface layer but is not always present?
A. C
B. O
C. R
D. B
E. E
B
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The force necessary to maintain the speed of an object in free space is equal to
A. the force required to stop it. B. the mass of the object. C. zero. D. the weight of the object.
Which of the following best describes the composition of the earth's core?
A. It contains both fluid rock and solid rock. B. It is only fluid rock. C. It is made entirely of solid rock. D. It is hollow and full of air.
________ was one characteristic of socialist government policy in the cities of Eastern Europe
A) Large public housing projects in outlying districts B) Industrial zones in city centers C) Massive restructuring of city centers D) Destruction of all buildings closely related to capitalist activities
What is a measure of how cool skin can become (i.e., the lowest temperature that can be reached by evaporating water into the air)?
A) dew point temperature B) wet-bulb temperature C) dry-bulb temperature D) heat index