As recently as the 1940s, the world contained only about ________ states, but by 2011 there were ________ members of the United Nations
A) 30; 70
B) 40; 121
C) 50; 193
D) 60; 169
E) 70; 108
Answer: C
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How are fringing reefs, barrier reefs, and atolls related in structure and chronology?
a) Fringing reefs give rise to barrier reefs and then to atolls b) Atolls form from seamounts c) Barrier reefs develop from tablemounts d) Fringing reefs, barrier reefs, and atolls are all the same age
________ refers to large-scale intentional efforts to modify Earth's climate.
A. Climate construction B. Geoengineering C. Climate modeling D. Biospheric engineering
Plate tectonic movement results from ________
A) mass wasting B) high surface winds and erosion C) molten materials from the core escaping to the surface D) convective movements of rock in the underlying mantle E) unstable surface rock formations
Discuss four of the findings that urban ecologists have described from their intensive analysis of Baltimore and Phoenix
What will be an ideal response?