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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?

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