Amazing Science Facts Challenge
Test your knowledge of fascinating scientific discoveries and phenomena!
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8 questions · Quick play · Instant results
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Quiz Questions & Answers
Review every prompt, the correct responses, and helpful context to prep for your own run-through.
Question 1: What percentage of the human body is made up of water?
60%
50%
40%
Question 2: Which planet in our solar system spins backwards relative to the others?
Venus
Mercury
Mars
Question 3: What is the fastest land animal?
Lion
Gazelle
Cheetah
Question 4: Which element is the most abundant in Earth's atmosphere?
Nitrogen
Oxygen
Carbon dioxide
Question 5: What is the smallest bone in the human body?
Toe bone
Stapes
Finger bone
Question 6: How long does it take for light from the Sun to reach Earth?
24 hours
1 second
8 minutes
Question 7: What is the hardest natural substance on Earth?
Gold
Diamond
Iron
Question 8: How many hearts does an octopus have?
Four
Three
Two