Sudbury, Ontario's copper-nickel smelter is notorious for having
A. Destroyed the local ecosystem with sulfur-laden smoke
B. Spread cyanide in nearby rivers
C. Caused childhood leukemia in nearby neighborhoods
D. Caused brown lung disease in miners
E. Caused all of these
Answer: A
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Chicago's explosive population growth of the late 19th century was due to industrialization and its excellent
A) geographic situation. B) natural resources. C) educational system. D) political leadership. E) social programs.
Match the biome or aquatic system listed below with the description that best characterizes it
a. euphotic zone d. tropical grassland b. coral reef e. cold forest c. Lake f. temperate desert 10. a few species of coniferous trees 11. upper layer where large, fast-swimming predatory fishes are found 12. supports large grazing and browsing animals in East Africa 13. created by polyps and zooxanthellae 14. contains widely spaced, drought-resistant plants 15. phytoplankton carry out about 40% of the world's photosynthesis here 16. benthic zone is closest to the bottom 17. daytime temperatures are very high in summer, but low in winter 18. scattered clumps of trees may have thorns to discourage herbivores 19. small, needle-shaped leaves on trees can withstand cold winters
In recent years, what kind of economic activity has Costa Rica been attracting?
A) banana plantations B) logging C) automobile manufacturing D) banking E) high-tech firms, such as semiconductor manufacturing
A mantle plume rises because
A. it is propelled upward by gas coming out of the magma. B. it is mostly molten. C. it is solid but less dense than material around it. D. it is molten and more dense than material around it.