________ makes lime precipitate out of a water solution
A) Rain falling out of clouds
B) Water squeezed into rock joints
C) Sublimation of liquid water
D) Reduction of temperature and pressure
E) Photosynthesis in heat-loving algae
Answer: D
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What was a major difference between Thomas Malthus, who published his ideas in 1798, and neo-Malthusians, who started advancing their ideas in the 1960s?
A) Neo-Malthusians took tropical crops into account. B) Neo-Malthusians embraced birth control and family planning. C) Neo-Malthusians calculated growth using advanced equations. D) Neo-Malthusians accepted migration as inevitable. E) There was no difference between their ideas.
Ullman's model of spatial interaction emphasizes three essential conditions. Which of the following is not one of them?
A. complementarity B. intervening opportunities C. gravity D. transferability
Explain what an Exclusive Economic Zone (EEZ) is and why it is important to Pacific island economies
What will be an ideal response?
A 1-kg block of iron has a weight of about
A. 10 N. B. 1 N. C. 5 N. D. more than 10 N.