Which section of the Earth has the highest material density?
a. crust
b. mantle
c. asthenosphere
d. outer core
e. inner core
e
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A total fertility rate (TFR) of 2.1 will maintain a population at its current level. Australia's TFR is only 1.9, yet its population continues to grow, albeit at a modest 1.0%. How is this increase possible?
A. The increase is attributed to aborigine birth rates, which are not counted in the census. B. Annually more people emigrate than immigrate. C. Australia has a positive net migration rate. D. It is not possible, so the data must be wrong.
Plate tectonics is a result of Earth's internal heat engine, powered by
A. gravity B. the Sun C. heat flowing from Earth's interior outward
On Earth, the Sun passes directly overhead at 25° north latitude ________ times a year
A) 0 B) 2 C) 1 D) 4
What will likely happen to this object in the future? (Image is computer generated)
A. The material will continue outward and remain in interstellar space or become incorporated in other objects. B. It will continue to evolve with stars going through their evolution. C. It will continue to consume its hydrogen through nuclear fusion and will emit electromagnetic radiation. D. The ejected material could be disbursed, with the material remaining in proximity to it.