Which of the following is a wind deposit?
a. Alluvial fan
b. Bajada
c. Yardang
d. Playa
e. Barchan dune
Answer: e. Barchan dune
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Which of the following statements about chain reactions is true?
A) The key requirement for a chain reaction is that more neutrons are produced than are absorbed. B) Three or more neutrons must be released to sustain a chain reaction. C) Only uranium isotopes are capable of supporting a chain reaction. D) It is not possible to stop or control a chain reaction once it has been started. E) A chain reaction will only take place when a critical mass of material has been assembled.
Whether or not _______ are a separate species from Homo sapiens, their brains were slightly
larger than those of modern humans. Fill in the blank(s) with the appropriate word(s).
What do most climate change experts predict will happen to Central Asia?
A) It will be hit hard by climate change, leading to melting of glaciers and reduced river flows. B) Because of the region's low density, the problems will be minimal. C) This dry region will benefit from higher overall precipitation. D) The region will move to the forefront of solar energy technology development. E) This region will not be affected by climate change.
____________________ ____________________ air masses form over the Southwest in summer
Fill in the blank(s) with correct word