________ proposed an explanation for magnetic anomalies.
A. Vine and Matthews
B. Charles Plummer
C. Diane Carlson
D. Harry Hess
E. Alfred Wegener
Answer: A
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Which numbered site is likely to have exposure of crystalline rocks?
A) 1, the continental shield
B) 2, the continental platform
C) 3, a basin in the continent
D) 4, a continental shelf
E) 5, a deep sediment-filled basin next to the continent
When comparing the ratio of developed land between 1982 and 2007, the National Resources Inventory studies revealed that
A) the ratio of urban to rural population in the United States decreased. B) the total area of farmland in the United States increased. C) more than 40 million acres of farmland and natural ecosystems have been developed. D) rural transportation accounts for most of the land that is developed.
What benefit is there for dairy farmers to locate near large cities?
A) The farmer has better access to transportation networks to ship their products. B) The farmer can sell milk, which is perishable, directly to consumers. C) The farmer can charge a premium because their products are local. D) The farmer has better access to labor. Dairy farming is labor intensive.
Photosynthesis is a main means of fixing ________ in the ecosystem
A) benthos B) oxygen C) carbon dioxide D) nekton E) nitrogen