What is the upper limit of stars the unaided eye can discern on a moonless night in a rural area?

A. about 30,000
B. about 3,000
C. about 300,000
D. about 3,000,000


Answer: B

Environmental & Atmospheric Sciences

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A) Thailand. B) Central Asia. C) parts of North Africa. D) Southern Africa. E) the Middle East.

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NAFTA was approved by the U.S. Congress in 1994

Indicate whether the statement is true or false

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A ________ is the icicle-like speleothem that grows down from the roof of a cavern

A) stalactite B) stalandite C) stalagmite D) slagdite

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A globe is an example of a __________________model and a map or a drawing are examples of a____________ model

Fill in the blank(s) with correct word

Environmental & Atmospheric Sciences