Science Quiz
Physics, chemistry, biology, astronomy, the human body. Twenty questions, no hand-waving.
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About this test
Scientific literacy is judged better by orders of magnitude than by formulas. Knowing that light travels roughly 300,000 kilometres per second is more useful day to day than reciting the equation behind it: that one number explains why sunlight takes eight minutes to reach us, and why we will never hold a live conversation with Mars.
Here is a verifiable and counter-intuitive detail: hydrogen alone makes up around three quarters of the ordinary matter in the universe by mass, yet free hydrogen is vanishingly rare in Earth's atmosphere, because it is light enough to escape our gravity. The most abundant element in the cosmos is almost absent from the air we breathe. That kind of gap between the local and the cosmic scale is exactly what makes science disorienting.
One principle is enough to improve: learn mechanisms before names. Understanding why a mitochondrion produces energy hands you its name for free, while the reverse never works. And always check your units — a large share of wrong answers in science quizzes are not knowledge failures but magnitude confusions.
This test is provided for entertainment purposes only. It is not a diagnosis or professional advice.