Air may best be described as:
A) a compound.
B) an element.
C) a mixture.
D) one of four basic substances that composes all things.
C
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Which of the following is an accurate statement about the eyewall of a hurricane?
A. It contains strong thunderstorms. B. It forms after the hurricane has made landfall. C. It makes up the inner portion of the eye. D. It is located on the outside of spiral rain bands.
The United States subsidizes mining companies through depletion allowances that amount to ____% of their gross income from mining and processing.
A. 2?4 B. 5?22 C. 30?44 D. 62?75 E. 83?95
Species that are found only in specific environments or have restricted localities are said to be ________
A) evenness B) diverse C) endemic D) rich E) structurally complex
What is the plastic layer in the mantle on which the crust “floats”?
A. Moho B. asthenosphere C. lithosphere D. inner core E. outer core