The planetary albedo of the earth is:
A) 7%.
B) 15%.
C) 30%.
D) 50%.
Answer: C
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"Philological nationalism" is the idea that "mother tongues" have given birth to nations
Indicate whether the statement is true or false.
Most indigenous groups in the Pacific Northwest relied on what as their primary source of food?
A) Agriculture B) Hunting C) Fishing and marine resources D) Gathering seeds, fruits, and berries.
Warming temperatures melt ice cover, exposing a darker surface that absorbs more solar radiation. In response, the air warms even further. This is an example of:
A) a positive feedback mechanism. B) a stable-feedback mechanism. C) a negative feedback mechanism. D) a variable-feedback mechanism.
Patterned ground is a feature of:
a. piedmont glaciers. b. periglacial landscapes. c. valley glaciers. d. cirque glaciers. e. ice sheets.