10 hard questions about science & nature
Question 1 of 10
What's the chemical symbol for water?
Question 2 of 10
What do human adults usually have 32 of?
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Question 3 of 10
The membrane in the ear is named for what musical instrument?
Question 4 of 10
What type of animal is an African wild cat?
Question 5 of 10
What is another name for a male sheep?
Question 6 of 10
What is the chemical symbol for gold?
Question 7 of 10
Botulinum toxin is commonly referred to as what?
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Question 8 of 10
What is Mercury's period of revolution around the sun?
Question 9 of 10
What is Pluto's period of revolution around the sun?
Question 10 of 10
How many Skylab Missions went up in space?
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