Science
Which is the planet with the greatest average density?
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What is the speed of the solar system around the center of the galaxy?
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What is the proper name for a "sundog", or an atmospheric optical phenomenon?
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In what year did Albert Einstein win the Nobel Prize for physics?
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Who discovered that a moving magnet generates electric current known as electromagnetic induction?
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John Glenn was the first American to orbit the earth, in how long a flight?
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Which of the following happens when air cools?
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Which of the following books has Carl Sagan not authored?
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Who was known for his famous "oil-drop" experiments to determine the charge of the electron?
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Which Apollo mission was launched on April 11, 1970?
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What branching nerve fibers receive messages?
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What is the final stage of ecological succession called?
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What scientist first showed that a changing electric field produces a magnetic field?
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About how often does Halley's Comet return?
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Which man-made waterway is 100.76 miles long?
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Which bridge has the longest span in the U.S.?
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Who was the space walking astronaut on Gemini 10?
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What percent of the Sun, by weight, is helium?
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Who was the commander of the first U.S. Space Shuttle mission?
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Which of the following people is not recognized as developing family therapy?
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