Which of the following describes when the twinkling of a star would be most pronounced?
A. when the wind is calm
B. when the relative humidity is high
C. when the star is directly overhead
D. when the night is very cold
Answer: D
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Humid subtropical hot-summer climates
A) air moist all year. B) have a pronounced dry period. C) can be either moist all year or have a pronounced dry period.
Which of the following geologic periods was not a time of extensive anoxic bottom waters, pushing bottom-dwelling species to extinction?
A. Late Devonian B. Cretaceous C. Middle Silurian D. Jurassic
The biosphere contains portions of the lower atmosphere, all of the hydrosphere, and all of the geosphere.
Answer the following statement true (T) or false (F)
Which of the following terms refers to the small, rapidly rotating whirls that sometimes occur within a large tornado?
A. whirlwind B. mesocyclone C. microtornado D. suction vortex