Cells that convert solar energy directly into electricity are called
a. electrosolar chips
b. photovoltaic cells
c. helioelectric units
d. photoelectric cells
e. solarelectric cells
B
Environmental & Atmospheric Sciences
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When agriculture involves endless hours of backbreaking work is it called
A) subsistence. B) peasant. C) labor-intensive. D) swidden. E) none of the above
Environmental & Atmospheric Sciences
The expansion of deserts into once populated areas is known as ________.
A. rain shadow effects B. desertification C. deflation D. desert migration E. sahel formation
Environmental & Atmospheric Sciences
Friction alters the ________ of surface winds.
A. Viscosity B. Heat content C. Speed only D. Density E. Speed and direction
Environmental & Atmospheric Sciences
What are the principal instruments of globalization in the last 30 years?
A) GDPs B) GNPs C) NGOs D) TNCs E) UGRs
Environmental & Atmospheric Sciences