An increase in stream velocity can be caused by _____
a. an increase in stream gradient
b. an increase in channel roughness
c. a decrease in stream competence
d. a decrease in stream capacity
e. a decrease in stream energy
a
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Electronic waste (computers, cell phones, etc.)
A. can be safely placed in landfills because they do not contain harmful or toxic components. B. is generally taken back by manufacturers who recycle the components. C. contains valuable metals D. None of these statements is correct.
What is the greatest contributing factor in the loss of polar bears in arctic areas?
A) decline in sea ice B) the tundra shifting northward C) fires in the taiga and tundra D) the decline of lemmings; the primary food of the polar bear E) hunting of the polar bear by the Inuit people
The most common soil type on Earth is
A. ultisols. B. entisols. C. andisols. D. mollisols.
Exponential growth would be represented by a ________ curve?
A. linear B. S-shaped C. J-shaped D. bimodal E. straight