In which biogeochemical cycle is the namesake element deposited in rock and exists as a gas where it influences the greenhouse effect?
A. nitrogen cycle
B. oxygen cycle
C. carbon cycle
D. water cycle
E. rock cycle
C
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Which of the following best matches the description?Manufacturing process that would reduce the waste produced.
A. chronic toxicity B. synergism C. LD50 D. threshold levels E. Superfund F. waste minimization G. reactivity H. hazardous wastes I. toxicity J. RCRA K. ignitability L. CERCLA M. acute toxicity N. National Priority List O. corrosiveness
From 1910 to 1950, population density of African Americans in ghettos
A) increased. B) remained the same. C) decreased. D) inverted. E) fluctuated.
Which of the following features are most closely associated with lakes?
a. kettles and cirques b. roche moutonnées and arêtes c. horns and cols d. hanging valleys and drumlins e. eskers and erratics
Weather conditions associated with the subtropical highs are usually cloudy and rainy
Indicate whether the statement is true or false