Science Facts Quiz
Test your knowledge with this medium Science quiz. 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!
Think you know your stuff? Try these:
- 1.
What is the speed of light in a vacuum?
- 2.
What part of the cell contains the genetic material (DNA)?
- 3.
Which gas makes up approximately 78% of Earth's atmosphere?
Know the answers? Test yourself above ↑
Science Facts Quiz — Test Your Knowledge of Amazing Scientific Facts
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.
How to Play
- Approach each question with an open mind — the truth is often stranger than the options that sound most reasonable.
- Choose your answer and read the full explanation.
- Share the most surprising facts with friends after you finish.
Frequently Asked Questions
Do I need a science background for this quiz?
No. Science facts quizzes reward curiosity and broad reading more than formal training.
Are all facts in the quiz scientifically accurate?
Yes. All facts are based on verified, peer-reviewed scientific information.
What is the most surprising fact in the quiz?
Play to find out — we do not want to spoil the best ones.