The greatest threat to tropical rain forests is ________
A) lack of rainfall
B) birds feeding in canopies of many trees
C) pesticide use
D) deforestation
E) high nitrogen levels in the soil
Answer: D
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Which of the following jet stream patterns transfers the most heat across the globe?
A. tropical easterly B. meridional C. low-level D. zonal
One difficulty in evaluating the effectiveness of cloud seeding is
A) it is impossible to determine the presence of updrafts in the region of a precipitating cloud B) it is impossible to determine the temperature in the region of a precipitating cloud C) it is impossible to determine the stability in the region of a precipitating cloud D) it is impossible to determine whether a seeded cloud would have produced precipitation even if it were not seeded
Examine the map of the plate boundaries and answer this question.
A subduction zone is located below ________.
A. H B. G C. C D. D
In the last 5.5 million years, rifting action tore Baja California and California west of the San Andreas Fault from the ________.
A. Pacific Plate and piggybacked them onto the North American Plate B. North American Plate and piggybacked them onto the Juan de Fuca Plate C. North American Plate and piggybacked them onto the Pacific Plate D. Nazca Plate and piggybacked them onto the Cocos Plate E. Pacific Plate and piggybacked them onto the Juan de Fuca Plate