A weather prediction for the United States based on El Niño events is an example of forecasting using ____
A) persistence
B) teleconnections
C) statistics
D) probabilities
B
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You are hopping on boulders beside a quiet stream that runs through a V-shaped valley. How did the boulders get there? The boulders were likely
A. deposited along the stream bank by wind. B. carried in the stream then deposited at the stream bank. C. produced when chemical weathering broke up the rock along the sides of the valley. D. none of the above
What percentage of the original parent isotope is daughter if 4 half lifes have elapsed?
- 50%
- 75%
- 87.5%
- 93.75%
- 100%
What region has had the least success in expanding per capita food production?
A) Africa B) Asia C) Europe D) Latin America E) North America
A zone of surface divergence is an area of ________ and ________ biological productivity.
A. upwelling; high B. downwelling; high C. downwelling; low D. no vertical motion; average E. upwelling; low