The correct answer is: Photovoltaics.
The process that produces electricity from sunlight is known as photovoltaics ("photo" is derived from the Greek word for light; "voltaic" refers to volt or voltage). In general, a photovoltaic process is capable of producing a voltage when exposed to radiant energy, especially light. As for the other choices: Photophoresis is the production of unidirectional motion in a collection of very fine particles, suspended in a gas or falling in a vacuum, by a powerful beam of light. Photochromism is the ability of a chemically treated plastic or other transparent material to darken reversibly in strong light. Photoemission is the ejection of electrons, usually from a solid, by incident electromagnetic radiation. Photosynthesis is the synthesis of chemical compounds in light by chlorophyll-containing plant cells.
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1. The greenhouse effect is a process by which certain gases trap heat within the Earth's atmosphere, thereby producing warmer air temperatures. Which is NOT a greenhouse gas: carbon dioxide, water vapor, methane, carbon monoxide, or ozone?
2. What country is the world's largest producer of wind power?
3. How much has the temperature of Earth risen over the past century?
4. Published in 1962, Silent Spring was a landmark book that raised environmental awareness, especially with regard to the misuse of chemical pesticides. Who wrote this influential book?
5. Kermit the Frog, the lovable Muppet, originally performed the song "(It's Not Easy) Bein' Green". Since then, many other non-Muppet entertainers have recorded their own versions of the tune. Which performer has NOT recorded this song: Ray Charles, Van Morrison, Barbra Streisand, Tony Bennett, or Frank Sinatra?
6. In what year was Earth Day first celebrated?
7. The source of solar power is the Sun. The ancient Egyptians in particular worshipped the Sun and built a city in its honor. Name this ancient city.
8. Walden, or Life in the Woods, written in 1854 by Henry David Thoreau, deals with Thoreau's life on Walden Pond as he seeks to establish a harmonious relationship with nature. Where exactly is Walden Pond?
9. Corn, specifically the starch portion of the corn kernel (corn seed), is the main source for production of ethanol for use as a biofuel. How many kernels does the average ear of corn have: 100, 200, 800, or 1000?
10. Finally, since this quiz is all about "going green", name the country whose flag has gone completely green. In other words, which is the only country in the world to have a flag that is all one color, specifically green, with no other design or emblem on it?
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