If gravity pulls infiltrating water downward, what force allows water to be pulled upward at the capillary fringe?
A) Static electricity
B) Friction
C) Surface tension
D) Compression
Answer: C
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Indications of past climates in tree rings are determined by examination of the:a
thickness of growth rings b. density of growth rings c. presence of frost rings d. all of the above e. only a and b
Field experiments studying the effects of increased CO2 on forest growth have shown ________
A) decreased net primary productivity B) increased net primary productivity only when nitrogen and water are abundant C) there is no real effect on net primary productivity D) increased net primary productivity only when phosphorus and iron are abundant E) increased net primary productivity under all circumstances
There are four alcohols with the molecular formula C4H9OH. How many of these are chiral?
A) 0 B) 1 C) 2 D) 3
Many economic geographers believe capitalism creates
A) democracy. B) uneven spatial development. C) stability. D) neoclassical relations. E) equality over time.