The combined influence of CFCs, methane and nitrous oxide as greenhouse gases is insignificant
Indicate whether the statement is true or false
FALSE
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A full lunar tidal cycle is ________
A) 12 hours in duration B) 12 hours 25 minutes in duration C) 24 hours in duration D) 24 hours and 50 minutes in duration E) 48 hours in duration
Which outcome is true of surface fires?
A. They increase the chance of crown fires. B. They kill all vegetation and wildlife in their path. C. They prevent the germination of trees species like jack pine and the giant sequoia. D. They free mineral nutrients that are locked up in vegetation and litter. E. They destroy mineral nutrients that are locked up in vegetation.
Which of the following is not something we can learn by determining isotopic ages?
A) The age of a volcanic eruption B) The age when a rock is uplifted toward the surface C) The age of material from which clasts in a sedimentary rock were derived D) The cooling history by using different types of isotopic ages E) We can determine all of these.
Which process accounts for the sky's blue color?
A) light reflection B) light scattering C) albedo D) thermal convection