Methane produced from animal waste or by digesting garbage is an example of a(n)
A. Unconventional gas resource and a by-product of human activities
B. Nonrenewable energy source
C. Unconventional gas resource
D. Conventional gas source
E. By-product of human activities
Answer: A
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Which of the following pairs includes concepts that are most closely associated to each other?
A) Biological wealth and introduced species B) Biological wealth and biodiversity C) Instrumental values and extinction D) Intrinsic value and instrumental value
Which water molecule has the longest residence time?
A) a molecule in a river B) a molecule in snow C) a molecule in the atmosphere D) a molecule in the ocean E) All water molecules have equal residence times.
How do red and blue light differ?
a. Blue light has a higher speed of propagation. b. The wavelength of red light is longer. c. Red light has a higher intensity. d. Red and blue light have different directions of propagation. e. The wavelength of blue light is longer.
Shale is usually metamorphosed into ________
A) slate B) marble C) gneiss D) basalt E) tufa