Secondary rainbows occur when ____
a. ?two internal reflections of light occur in raindrops.
b. ?light refracts through ice crystals.
c. ?a single internal reflection of light occurs in raindrops.
d. ?light refracts through a cloud of large raindrops.
e. ?the Sun disappears behind a cloud and then reappears.
ANSWER: a
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KM
A cloud must have formed at which of the following altitudes?
A. 1 km B. 2 km C. 3 km D. 4 km
________ involves the fair treatment and meaningful involvement of all people regardless of race, color, national origin, or income, with respect to the development, implementation, and enforcement of environmental laws, regulations, and policies
A) Conservation B) Environmental justice C) Socialism D) Land ethics E) Ecological justice
Supercell thunderstorms are different from ordinary thunderstorms in that supercell thunderstorms?
a. ?contain thunder and lightning. b. ?have an anvil. c. ?contain hail. d. ?have a strong updraft and downdraft. e. ?have a tilted updraft in the mature stage.
What is a key problem associated with electrical power generation?
A. Excessive surface water consumption B. Excessive groundwater consumption C. Requires expensive desalinization D. Excessive thermal pollution