A power tower concentrates solar energy by
A) heating water in pipes that run along rows of mirrors.
B) using one very large glass lens to focus sunlight.
C) using a large field of mirrors to direct sunlight to a specific location.
D) collecting light in a series of fiber optic cables directed to underground steam rooms.
C
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Which one of the following processes would directly increase the amount of nutrients available to plants?
A) Respiration B) Mineralization C) Primary production D) Photosynthesis
________ tides occur at the first quarter moon.
A. Spring B. Mixed C. Semidiurnal D. Neap E. Diurnal
Which of the following best describes the free trade zone zona libre?
A) Border areas where products from one region can be sold to any country without import/export restrictions. B) A border area within Mexico in which American companies can conduct business without paying tariffs or trade fees. C) Extranational areas where good can be transshipped between ships or planes without customs searches by the nation hosting the zone. D) Both A and C
Which of the following is NOT a global concern of tropical forest removal?
A. surface and air temperature changes B. biodiversity C. oxygen production D. hardwood loss for furniture production