The cutting of large trees in a natural forest and subsequent sale of the logs for timber, is an example of
A) the consumptive use of a natural resource.
B) the productive use of a natural resource.
C) the minimum sustainable yield of a resource.
D) the carrying capacity of a population.
B
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The rock on top of Mt. Everest is a shallow marine limestone deposited 200 million years ago. What does this tell us about the geologic history of the Himalayas?
- 200 million years ago Himalayas did not exist.
- The ocean level 200 million years was much higher than today.
- There was a high altitude lake in the Himalayas.
There are many positive actions that have improved air quality.
Answer the following statement true (T) or false (F)
Which of the following is an ecosystem service?
A) Cleaning up a hiking trail in Rocky Mountain National Park B) Wetlands breaking down pesticides before they enter a waterway C) The Nature Conservancy buying sensitive land that lacks protection D) Recycling aluminum in order to extend the life expectancy of bauxite ore
Mass movements occur when
A. the shearing stress on the material exceeds its frictional resistance (or shear strength). B. the frictional resistance (shear strength) of the material exceeds its shearing stress. C. geological materials are affected by the downward pull of gravity, regardless of their shear strength. D. the angle of repose for the material reaches a maximum.