The advantage of effluent sewerage is that
A. Since solids are digested like a septic system, the effluent can be used as fertilizer
B. Families can do all their processing at home
C. Since solids remain in the liquid, disposal is easy and cheap
D. Large, expensive municipal systems are no longer needed
E. Since solids are removed, pipes and pumps to the central treatment plant can be small and cheap
Answer: E
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Mountain ranges that are made up of many folded mountains are usually produced by
A. magma rising up from Earth's interior. B. tectonic compression. C. uplifting along fault planes. D. tectonic tension.
Air pressure at 5500 m (18,000 ft.) is ________ percent of that at sea level
A) 0 B) 10 C) 30 D) 50 E) 75
Both sea surface (below) and air temperature (above) show a warming period beginning in
A. 2010. B. 1940. C. 1860. D. 1980.
In 1979, Jimmy Carter signed the Alaska Wilderness Act creating the ________, an area currently under threat in Congress of losing its protection to gas and oil drilling
A) Alaska Wilderness Refuge (AWR) B) Arctic National Park (ANP) C) Alaska National Wildlife Refuge (ANWR) D) Arctic Wilderness and Wildlife Preserve (AWWP)