For the vast bulk of human existence — upwards of 95% of their time on earth — what was the dominant style of living?
A) agriculturalists
B) hunters and gatherers
C) industrialists
D) pastoral nomads
E) urban dwellers
B
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The water cycle includes water in the
A. atmosphere, biosphere, ground, surface, and ocean. B. hydrosphere. C. oceans and atmosphere only. D. both A and B
Oceans
A) cover nearly half the Earth's surface. B) have likely slowed atmospheric warming over the last 50 or so years. C) have fixed circulation patterns that do not change. D) have little effect on the atmosphere. E) definitely contribute to global warming.
Glaciers form only near the poles.
Answer the following statement true (T) or false (F)
A caldera similar to this one filled with water to become Crater Lake in Oregon (42°56'42"N, 122°06'01"W; see Figure 35-2). Why isn’t the Okmok Caldera presently filled with water?
The question is based on Map T-2, the “Umnak, Alaska,” topographic map (scale 1:250,000; contour interval 200 feet), Map T-21b, a satellite image; and Figures 35-3 and 35-4, a shaded relief map and a stereogram showing the Okmok Caldera (53°25'33"N, 168°07'38"W) on Umnak Island in the Aleutian Islands. What will be an ideal response?