Water moves into soil particles in an expansive soil because of:
a. high pressure caused by rising water tables
b. increasing permeability due to weathering of the soil
c. suction caused by dry conditions
d. osmotic potential between interparticle spaces and larger soil pores
d
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Which of the following is NOT primarily a consumer service?
A) transportation services B) retail and wholesale services C) education services D) health services E) hospitality services
Which statement best summarizes the law of conservation of matter?
A. We can rearrange matter but we cannot create or destroy it. B. Matter that is highly concentrated and readily available is most useful as a human resource. C. Matter consists of elements and compounds. D. Matter can undergo a physical change in its chemical composition. E. Matter should never be wasted.
Compared to shifting cultivation, intensive subsistence agriculture is characterized by which of the following?
A) smaller farms B) lower population densities C) greater use of animal power D) more diversified cropping E) greater use of land in rainforests
Why do 2500 economists, including eight Nobel Prize Winners in economics, believe that the U.S. tax system is backwards?
A. because it encourages more pollution B. because it encourages more jobs C. because it discourages resource waste D. because it discourages environmental degradation