Most of the oxygen in the air is produced by what chemical process?
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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?
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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?
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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?
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History Quizzes
History Quiz
Are you a Historian?
Average Score: 8
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Quiz about History
How many retries did you need?
Average Score: 7
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10 Questions About History
We bet you'll never ever score a solid 10
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History Sudden End Quiz
Who is able to make it to the end?
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1980s Nostalgia Quiz
Try scoring a 7 or higher
Average Score: 8
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Challenging History Questions
Can you score higher than a 5 in this hard quiz
Average Score: 9
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Quiz on History.
We think you can do way better than a lousy 6
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History Quiz
Wil you stand a chance?
Average Score: 8
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Elementary School History Quiz
We wish you good luck with this quiz!
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Geography Quizzes
Geography quiz. Level Impossible.
Dare to share?
Average Score: 8
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Have you ever been to Japan?
HARD Geography Quiz
Average Score: 6
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What was your last travel destination?
HARD Geography Quiz
Average Score: 6
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Geography Quiz
You won't score a 6 or higher!
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Only an Aussie can score a perfect 10 in this quiz!
Play Now
Average Score: 8
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Quiz on Geography
Good luck making this fun quiz!
Average Score: 9
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Hard Geography Quiz
You won't score a 6 or higher!
Average Score: 9
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HARD Science Quiz
We hope you're smart enough to score a 7+
Average Score: 4
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Play This Geography Quiz Now!
It's going to be impossible to score a 6+
Average Score: 6
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Music Quizzes
How often do you listen to music?
HARD Music Quiz
Average Score: 7
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Play this music quiz by clicking here
And tell us what you scored. We hope you did good!
Average Score: 9
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Very Hard Music Quiz
10 Questions
Average Score: 6
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Play Music Quiz
We bet you're not a musician!
Average Score: 9
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10 difficult questions about John Denver
Let us know your score in the comments
Average Score: 7
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Challenging Music Quiz.
We are sorry for these difficult questions!
Average Score: 9
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Music Quiz
Can you do better than a 5 out of 10?
Average Score: 9
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Quiz about Music
Only real music fans score a decent 7+
Average Score: 9
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How often do you listen to music?
HARD Music Quiz
Average Score: 7
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Science Quizzes
HARD Science Quiz
We hope you're smart enough to score a 7+
Average Score: 6
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Quiz For Scientists
Have you ever entered a science fair?
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Play This Science Quiz
Only for quizzers with an high IQ
Average Score: 9
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HARD Science Quiz
Who can beat the average score?
Average Score: 8
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Hard Science Quiz
Tell us if you scored an impossible 10
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Don't bother beating my score
Science Quiz
Average Score: 7
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Mad Science Quiz
Can you do better than a 7?
Average Score: 8
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Try scoring a 10 out of 10
10 HARD Science Questions
Average Score: 7
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Most people can't even score 5 out of 10 in this science quiz
Play Science Quiz
Average Score: 9
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Who Sang Quizzes
Who sang these songs?
10 song questions
Average Score: 9
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Can you score a 6 or better ?
Do you remember who sang this song?
Average Score: 9
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Who sang these songs?
10 questions about music
Average Score: 6
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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: 9
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Who Sang This Song: Sudden Death Style
Nobody will reach question 12
Average Score: 0
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Who Sang These Country Songs?
Who is able to recognize all 10 country songs?
Average Score: 9
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Who Sang These Songs?
You'll never ever score higher than a 6
Average Score: 6
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Do You Know Who Sang These Songs?
Try scoring a 6+
Average Score: 8
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Who Sang These Songs
Did you know more than 5 songs?
Average Score: 9
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Food & Beverage Quizzes
Food and Beverage Quiz
Who is able to score higher than a lousy 4? Share if you did
Average Score: 9
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Unknown Fruit Quiz
No one scores a 6 or more in this unknown fruit quiz!
Average Score: 7
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Food and Beverage Quiz
10 questions but you won't get them all correctly!
Average Score: 9
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Challenging Food & Beverages Quiz
We challenge you to beat his score!
Average Score: 8
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Challenging Food Quiz
10 HARD questions about food & beverages
Average Score: 6
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Food & Beverages Quiz
We challenge you to score higher than a lousy 5
Average Score: 8
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Food and Beverage Quiz
10 questions but you won't get them all correctly!
Average Score: 9
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General Knowledge Quizzes
Mixed Trivia Questions
What did you learn from this quiz?
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Play if you dare!
General Knowledge Quiz
Average Score: 6
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General Knowledge Quiz
What will you score? Find out!
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Mixed Knowledge Trivia
We bet you can't score higher than a 5
Average Score: 8
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Fun Trivia Quiz
But you won't even get 5 right!
Average Score: 8
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Unbeatable Knowledge Trivia Questions
What did you score?
Average Score: 9
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Unbeatable Mixed Questions
Share your score in the comments below
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General Knowledge Quiz
We dare you to score at least a 9
Average Score: 8
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Trivia Quiz
An 8+ is considered genius
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Literature Quizzes
Literature Test
What did you score? Share below if you dare!
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Literature Quiz
Who of our quizzers can get a perfect 10? Share below!
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Movie Quizzes
Lights, Camera, Quotes!
Who can get a perfect 10? Share if you did!
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Movie Quiz
Can you score perfect 10?
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We bet you can't even finish half of these movie titles in this quiz
Movie Quiz
Average Score: 10
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Movie Quiz
What movie has your best memory?
Average Score: 8
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It's highly doubtful you can complete even half of these movie titles in this quiz.
Movie Quiz
Average Score: 9
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Crazy Quiz About Movies!
Nobody will be able to score a 7+
Average Score: 9
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HARD Movie Quiz
Enjoy and share your score below in the comments
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Movies: 10 Daunting Questions
We hope you have watched enough movies
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Math Quizzes
HARD Math Quiz
Do you know the answer to this riddle?
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Math Quiz
Only those who are good with numbers stand a change!
Average Score: 9
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Math Quiz
Absolutely no one scores higher than a 5
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Math IQ Test
Do you know the answer?
Average Score: 9
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Math Quiz
Absolutely no one scores higher than a 5
Average Score: 8
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Can you solve this?
go to Math Quiz
Average Score: 9
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Mathematics Quiz
What did you score? Let us know in the comments
Average Score: 7
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Mathematics Quiz
Are you a real mastermind in mathematics?
Average Score: 7
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Math Quiz
Are you real mathelete? Let us know below!
Average Score: 8
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Can you beat the score of this nurse?
Everybody likes music, but how much do you know about it?