What is the best example of a major human impact on mountain ecosystems?
A. conversion to cropland
B. overgrazing by livestock
C. depletion of groundwater
D. timber cutting
E. habitat loss due to the development of major urban areas
Answer: D
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Compare the first and second laws of thermodynamics
What will be an ideal response?
During its orbit the earth's maximum distance from the sun is approximately 152 million kilometers. Which of the following is the correct way to express this number in scientific notation?
A) 1.52 x 10^5 B) 1.52 x 10^6 C) 1.52 x 10^7 D) 1.52 x 10^8
Evaluate which has had a more destabilizing influence in Central Asia and Afghanistan: colonization or mixed ethnic composition
What will be an ideal response?
Which of the following surface conditions produces a cumulus cloud with the lowest base?
A. air temperature 32°C and dew point 4°C B. air temperature 32°C and dew point -7°C C. air temperature 32°C and dew point 10°C D. air temperature 32°C and dew point 16°C