Desertification is irreversible. Indicate whether the statement is true or false
F
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The two basic processes of diffusion are ________.
A. cascade and stimulus B. relocation and contagious C. contagious and hierarchical D. expansion and hierarchical E. expansion and relocation
You go camping in Canada with a friend. You both go to bed when the Sun goes down and get up when the Sun comes up, but you both notice that you are not getting enough sleep! What time of year are you most likely near?
A) fall (autumnal) equinox B) summer solstice C) spring (vernal) equinox D) winter solstice
Tropical savanna is being converted to ________ biome because of overgrazing, loss of grasses and erosion
A) tropical rain forest B) desert C) taiga D) tundra E) paramo
Most oceanic islands and seamounts are
A. large fan-shaped mounds deposited by turbidity currents. B. places where the seafloor has been buckled upward by convergence. C. constructed by volcanic eruptions that first occur under water. D. small pieces rifted apart from continents.