If the population growth rate remains at 1.3% per year, the earth's population will reach 12 billion:
a. around the year 2025
b. around the year 2050
c. around the year 2075
d. none of the above
b
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It is true that
A) the surface level and upper level of the troposphere are two distinct layers. B) the Bjerknes model of cyclogenesis gives the best explanation for the formation and life of mid-latitude cyclones. C) upper-level divergence has little impact on the surface. D) the temperature at the surface can affect air flow at upper levels of the atmosphere.
Soil moisture tightly bound to each soil particle and unavailable for plant use is termed ________ water
A) capillary B) gravitational C) available D) hygroscopic
What is the speed in meters per second of a deep water wave with a wavelength of 1.5 meters?
A) 0.98 meters per second B) 1.53 meters per second C) 2.34 meters per second D) 2.77 meters per second E) 7.68 meters per second
Which of the following does not contribute to controlling the motion of the wind?
A) pressure gradient force B) friction C) Coriolis effect D) ozone layer (and hole