Test your knowledge with this medium Science quiz. This quiz includes questions about science players, records, and history. Each session picks 10 random questions from 85 total — try again for a new set!
10 random questions from 85 total • medium
Each session picks different questions!
What is the speed of light in a vacuum?
What part of the cell contains the genetic material (DNA)?
Which gas makes up approximately 78% of Earth's atmosphere?
Know the answers? Test yourself above ↑
Science is full of facts so remarkable they seem fictional: a teaspoon of neutron star material weighs billions of tonnes, octopuses have three hearts, a day on Venus is longer than a year on Venus. The Science Facts Quiz puts these mind-bending realities to the test.
Unlike a conventional science quiz, the science facts format prioritizes the remarkable over the academic. Questions are chosen because the answers are genuinely surprising, thought-provoking, or awe-inspiring — even to people who are not science enthusiasts. Winning this quiz is about curiosity and broad reading, not formal scientific training.
Whether you watch science YouTube channels, read popular science books, or just absorb fascinating facts from the internet, this quiz is the perfect way to see how much sticks. Every explanation is worth reading even when you get an answer right — there is almost always more context to absorb.
No. Science facts quizzes reward curiosity and broad reading more than formal training.
Yes. All facts are based on verified, peer-reviewed scientific information.
Play to find out — we do not want to spoil the best ones.
