Rust has a tendency to form when iron in contact with water reacts according to the following reaction: 4 Fe + 3 O2 ? 2 Fe2O3 What is happening at the cathodic region?
A) Iron is being oxidized.
B) Oxygen is being oxidized.
C) Oxygen is being reduced
D) Iron is being reduced.
E) none of the above
C
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Which of the following would cause the sea level to rise?
A) A decrease in the number of glaciers on land B) Faster rates of seafloor spreading C) A rise in the temperature of the oceans D) All of these are correct.
Ocean currents in the southern hemisphere move in a clockwise fashion
Indicate whether the statement is true or false
Which of the following is NOT a challenge facing Caribbean tourism?
A) capital leakage where most the profits rarely remain in the local economy B) a trend of Americans to either opt for domestic beach resorts and/or more exotic locales such as Costa Rica or the Persian Gulf C) the vulnerability of the industry to external market forces (such as a 9/11 style attack or a global recession) that would lead to a dramatic drop in international arrivals D) geopolitical instability throughout the Caribbean Basin which has proven to be detriment to tourism E) a trend towards cruise ship visits which limits tourist interaction ? both cultural and economic ? with the local islanders
Agricultural sustainability depends upon an understanding and proper management of which of the following cornerstones of both ecosystem and food production?
A) Irrigation systems B) Agricultural soils C) The generation of new plant hybrids using genetic engineering D) The agricultural technology necessary to plow, plant, and harvest