Which process of the carbon cycle is one that is affected solely by humans?
A. forest fires
B. burning of fossil fuels
C. photosynthesis
D. precipitation
E. aerobic respiration
Answer: B
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Folded U-shaped structures with the youngest layer in the center are called __________
a) basins b) domes c) monoclines d) anticlines e) synclines
A sludge digester as part of an urban wastewater treatment facility produces a useful fuel called
A) carbon dioxide. B) ammonia. C) biogas. D) oxygen.
Which of the following best describes the principle of faunal succession?
A) Rock layers will extend equally in all directions until they pinch out or reach the edge of a basin. B) Fossil organisms succeed one another in a specific and identifiable order. C) Only the most successful organisms will survive climatic extremes. D) Faults are younger than the materials they cut across.
The short-wavelength UVC is the most hazardous UV, but is largely absorbed by atmospheric oxygen before it reaches earth's surface.
Answer the following statement true (T) or false (F)