Which of the following is the most similar between soil and regolith?
A) biologic activity
B) sediment content
C) support of plant life
D) horizons
Answer: B
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Philip Levin, Donald Levin and other biologist have cautioned us that speciation rates can increase for opportunistic species such as
a. Fish b. Birds c. reptiles and birds d. birds and weeds e. weeds, rodents and cockroaches
As a stream-related measure, competence is expressed as a _______.
a - velocity (meters per second) b - discharge (cubic meters per second) c - gradient (meters per kilometer) d - diameter (millimeters) e - time (seconds)
How long must a high-level nuclear waste facility be able to provide safe isolation?
a. 25 years b. 250 years c. 2,500 years d. 25,000 years e. 250,000 years
The new boom in oil and natural gas fracking is posing risks in
A) air quality. B) zoonotic diseases. C) exposure to radioactivity. D) water quality.