List two main characteristics of air mass source regions
What will be an ideal response?
Answer: (i) tend to occur in high and low latitudes where the conditions of temperature and moisture are not highly variable.
(ii) the source region must be large.
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What is the predicted number of cases per 1000 population in a city where the vaccination rate is 102 out of 1000?
A regression of the number of cases of a particular disease per 1000 people based on the number of people vaccinated against it as children (per 1000) is performed on data collected from 34 cities. The results are summarized below:
Intercept .914
Slope -.001
In middle latitudes, which of the following cloud types has the lowest base?
A. altocumulus B. stratocumulus C. cirrostratus D. cirrus
Structural damage from tornadoes is usually caused by
A) large hailstones. B) a lack of conservation of angular momentum. C) high winds. D) pressure differences between the inside of the structure and the outside air.
Which is NOT TRUE regarding land degradation?
A) Poverty is a major cause of land degradation. B) Land degradation can lead to landslides. C) Soil compaction is one form of land degradation. D) Land-use change has universally negative effects on human well-being. E) Demand for more food production contributes to overexploitation of good agricultural soil.