Since 1960, Chesapeake Bay has suffered from water pollution. What is a major cause of this?
A. human population growth
B. dam construction
C. sea-level rise
D. introduction of exotic fish species
E. waste from fishing boats
Answer: A
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Over half of the Earth's solid surface is at least 3,000 meters below sea level
Indicate whether the statement is true or false
The annual temperature range is quite small near the equator. This is true primarily because:
A) low pressure systems are almost never present. B) wind speeds tend to be always slow. C) the earth emits more infrared energy at these locations. D) solar radiation is nearly uniform all year. E) the elevation of most land areas there is near sea level.
The following diagram illustrates streams in a set of drainage basins.
All other variables related to stream size being equal, which stream in the diagram above will have the largest discharge?
A. A B. B C. C D. D
The tropical Sahel region is particularly vulnerable to drought, but its ecosystems have mechanisms to cope and recover from this stress.What terms describes the ability of Sahel regions to cope through drought cycles?
a. tropical swing shifts b. de-persistence c. retoleration d. desertification e. resilience