Tropical disturbances are most likely to form
A) through the actions of easterly waves.
B) through convection processes associated with ITCZ.
C) when mid-latitude troughs migrate south.
D) above 20 degrees latitude and below -20 degrees latitude.
Answer: A
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In polar areas,
A) as ice melts, water's salinity increases and density decreases. B) as ice forms, water's salinity decreases and density increases. C) as ice forms, water's salinity increases and density increases. D) as ice melts, water's salinity increases and density increases.
Data that can be differentiated by a ranking relationship are called:
A. interval data B. nominal data C. ratio data D. ordinal data
Figure 3.18 Estimated annual average net primary productivity in major life zones and ecosystems pressed as kilocalories of energy produced per square meter per year (kcal/m2/yr).
?
Examine the accompanying figure. Notice the amount of average net primary productivity gets smaller and smaller as you move down the list of terrestrial ecosystems and, similarly, in the list of aquatic ecosystems. What is the common factor in the terrestrial system that causes the decline? What is the common factor in the aquatic system that causes the decline there?
What will be an ideal response?
Food security refers to
A. the efforts a nation expends to protect its food resources from invasions by other countries. B. the individuals who distribute food in underdeveloped nations. C. the ability to obtain sufficient food on a day-to-day basis. D. the fact that there is not enough food for the global population.