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Question 1 of 10
Most of the oxygen in the air is produced by what chemical process?
Question 2 of 10
Which of these devices would you most likely use to listen to music?
Question 3 of 10
Alfred J Gross invented this for doctors, who didn't like it, although the last people to use it were hospital doctors. Mind you, the tech behind it also powers garage openers. What is it?
Question 4 of 10
Which space probe landed on Mars in June 1999?
Question 5 of 10
What country shares its name with an ink that is chemically inert, not affected by sunlight and virtually permanent?
Question 6 of 10
At 11:38 a.m., on January 28, 1986, just 74 seconds into its 10th mission, an O-ring ruptured, setting off a fiery explosion in the main fuel tank of which space shuttle?
Question 7 of 10
What happens to the pressure of water as depth under the water increases?
Question 8 of 10
The grandfather paradox is held up as one of the risks of what improbable science fiction activity?
Question 9 of 10
Water freezes at what temperature?
Question 10 of 10
Wood's glass, which blocks most wavelengths of light, was originally used to encode messages. What kind of light does it let through?
History Quizzes
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History Quiz
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Elementary School History Quiz
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History Quiz
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History Test
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History Test
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10 questions about history!
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Very Hard History Quiz
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Very Hard History Quiz
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Geography Quizzes
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Geography Quiz
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Geography Quiz
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Geography quiz. Level Impossible.
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Average Score: 8100% knows the answer to this question: "The Harrods department store is in the Knightbridge neighborhood of which city? " -
Challenging Geography Quiz
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Geography Quiz
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HARD Geography Quiz
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Average Score: 6100% knows the answer to this question: "Malta achieved independence from which European country in 1964? " -
Geography Quiz
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Geography Knowledge Trivia Quiz
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Challenging Geography Quiz
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Music Quizzes
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Impossible Music Quiz
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Music Quiz
Have you ever been to a concert?
Average Score: 999% knows the answer to this question: "Davy Jones was the lead singer in which band? " -
10 famous songs, 10 unfinished titles
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Music Quiz For Intelligent People
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Average Score: 7100% knows the answer to this question: "After a brief mid-career effort to play for the Detroit Lions, who included two of the Lions (Mel Farr and Lem Barney) portraying party-goers in the background of "What's Going On"? " -
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Average Score: 9100% knows the answer to this question: "Help was a hit song of which band? " -
Challenging Music Quiz
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Music Quiz
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Very Hard Music Quiz
10 Questions
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Challenging Music Quiz
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Science Quizzes
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HARD Science Quiz
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Average Score: 6100% knows the answer to this question: "HP and IBM are brands of which product? " -
Are you a scientist?
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10 questions
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Science Quiz
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Science Quiz
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Science Quiz
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Quiz For Scientists
Have you ever entered a science fair?
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Nobody can score higher than a lousy 5
Science Quiz
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Who Sang Quizzes
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Average Score: 9100% knows the answer to this question: "Who sang the famous song "Thriller" (1983) " -
Who Sang These Songs?
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Average Score: 997% knows the answer to this question: "Who sang the famous song "Green Green Grass Of Home" (1966) ? " -
Who Sang These Famous Classic Rock Songs?
What's your favorite classic rock hit? Let us know in the comments!
Average Score: 8100% knows the answer to this question: "Who sang the famous song "(I Can't Get No) Satisfaction" (1965)? " -
Who Sang These Songs From The 70s?
10 hard questions
Average Score: 9100% knows the answer to this question: "Who sang the famous song "Fernando" (1975) ? " -
Who Sang These Songs
Did you know more than 5 songs?
Average Score: 9100% knows the answer to this question: "Who sang the famous song "You Make Me Feel Like A Natural Woman" (1967) ? " -
Who Sang These Psychedelic Rock Songs?
How many rock songs did you know?
Average Score: 899% knows the answer to this question: "Who sang the famous song "Good Vibrations" (1966)? " -
60's music quiz
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Average Score: 8100% knows the answer to this question: "Who sang the famous song "Sunny Afternoon" (1966) ? " -
Who Sang These Songs From The 70s?
10 hard questions
Average Score: 898% knows the answer to this question: "Who sang the famous song "Fernando" (1975) ? " -
Who sang the famous song "Hey Jude" (1968) ?
If you know the answer, make sure you check out this quiz, you might score a perfect 10
Average Score: 9100% knows the answer to this question: "Who sang the famous song "Hey Jude" (1968) ? "
Food & Beverage Quizzes
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Unknown Fruit Quiz
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Challenging Food & Beverages Quiz
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Challenging Food & Beverages Quiz
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Average Score: 8100% knows the answer to this question: "Pop tarts can be heated in which of the following? " -
Food & Beverages Quiz
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Average Score: 8100% knows the answer to this question: "Where would you find mussels? " -
Food & Beverages Quiz
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Average Score: 9100% knows the answer to this question: "Also called pieplant, what tart pink vegetable is often used as a pie filling? " -
10 fun questions about food you probably can't answer
Food Quiz
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Food and Beverage Quiz
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Food and Beverage Quiz
10 questions but you won't get them all correctly!
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Challenging Food Quiz
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General Knowledge Quizzes
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General Knowledge Quiz
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Impossible Mixed Trivia
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Extreme Hard Test
Scoring higher than a 4 seems impossible!
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Challenging Knowledge Trivia
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10 Questions for Smart Quizzers
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10 Challenging Questions
How many questions. did you answer correctly?
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Mixed Trivia
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General Knowledge Quiz
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Quiz about General Knowledge
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Literature Quizzes
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Literature Quiz
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Literature Quiz
How much knowledge have you stored in your brain about Literature?
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Literature Test
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Literature Quiz
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Literature Quiz
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Literature Quiz
Who is your favorite author?
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Movie Quizzes
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Movie Quiz
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Movie Quiz
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Movies: 10 Daunting Questions
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10 Questions about popular movies
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HARD Movie Quiz
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Average Score: 6100% knows the answer to this question: "The Turning is a modern take on what novella? " -
10 Hard Movie Questions
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Movie Quiz
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Only 10% can complete all 10 of these movie titles
Movie Title Quiz
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Quiz about Movies
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Math Quizzes
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Math Quiz
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Challenging Math Quiz
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Mathematics Quiz
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Math Test
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Mathematics Quiz
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Math Quiz
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Math IQ Test
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SUDDEN DEATH QUIZ
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Math Quiz
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Who or what am I?
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Everybody likes music, but how much do you know about it?