Elements such as carbon, nitrogen, oxygen, and sulfur were added to the Earth's early atmosphere through ________.
A. volcanic emissions
B. the chemical weathering of rocks
C. the mechanical weathering of rocks
D. contact with space
E. photosynthesis
Answer: A
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Which of the following environmental problems is NOT a major issue in Australia and Oceania?
A) Major mining operations have threatened the environment. B) Global warming threatens to drown islands of the region as sea levels rise. C) Wide-scale burning of forests after they have been cleared is creating smoke pollution. D) Exotic plants and animals are leading to the extinction of indigenous species. E) Woodlands have been destroyed to produce pastures.
What are the elements in the "A" columns of the period table called?
A) main group elements B) inner transition elements C) metalloids D) transition elements
What is the leading oil-producing state in the United States?
A) California B) Florida C) Oregon D) Texas E) Utah
Where do most super-cells form?
A. between cP and mT air masses along a cold front B. between cP and mP air masses along a cold front C. between cP and mP air masses along a warm front D. between cP and mT air masses along a warm front