From the center outward, the correct order of the zones of Earth is
A. liquid core, solid core, crust, mantle, atmosphere.
B. liquid core, solid core, mantle, crust, atmosphere.
C. solid core, liquid core, mantle, crust, atmosphere.
D. solid core, mantle, liquid core, crust, atmosphere.
Answer: C
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______ navigation provides navigation within an area of the website.
A. Primary B. Subsidiary C. Contextual D. Adaptive
If more horizontal force is applied to a sliding object than is needed to maintain a constant velocity, the object
A) accelerates in the direction of the applied force. B) accelerates opposite the direction of the applied force. C) experiences greater friction. D) none of the above
An airplane needs to reach a forward velocity of 203.0km/h to take off. On a 2000-m runway, what is the minimum uniform acceleration necessary for the plane to take flight if it starts from rest?
A) 1.0 m/s2 B) 0.87 m/s2 C) 0.95 m/s2 D) 0.79 m/s2
Which chemical elements were created during the first few minutes of the "big bang" that started our universe?
A) All 92 of the naturally-occurring chemical elements. B) Only the elements through iron in the periodic table, i.e., only elements 1 through 26. C) Only the first three elements: hydrogen, helium, and lithium. D) Only the heaviest elements, having atomic numbers higher than that of lead. E) No elements were produced during the big bang--all the normal chemical elements were produced much later.