5-Second Quiz: General Knowledge
Body, animals, elements, weather — ten quick ones with sources.
10 questions · 5 seconds each · 3 easy, 4 medium, 3 hard
Faster right answers score more. Running out of time counts as wrong.
Five seconds is plenty to say how many chambers your heart has — but is it enough for the SI unit of force, or the base RNA has and DNA doesn't? This quiz mixes the human body, animals, chemistry, units, weather and a few inventions.
Every answer was checked with a science agency or museum — NIH, NIST, NOAA, the Smithsonian — and each one comes with its source when you finish. Three easy, four medium, three hard: the last three are where encyclopedias pull ahead.
Grades
- 0–39 ptsCurious — Curious is a good place to start — the easy round was yours.
- 40–59 ptsSharp — Sharp. A few numbers got away from you, the rest didn't.
- 60–79 ptsBrainy — Brainy. You only hesitated on the textbook-hard ones.
- 80–100 ptsWalking Encyclopedia — A walking encyclopedia — and a fast one.
Two sample questions
What is the largest organ of the human body?
- Liver
- Brain
- Skin
- Lungs
Show the answer
Skin — Skin wraps and protects the whole body, which makes it the body's largest organ. Source
How many chromosomes are in a typical human cell?
- 48
- 46
- 23
- 44
Show the answer
46 — Human cells normally carry 23 pairs of chromosomes — 46 in all. Source
How scoring works
A right answer is worth 1 point plus up to 0.5 for speed — the more of the 5 seconds you have left, the bigger the bonus. Wrong answers and timeouts score nothing. The total is scaled to 100.
Ten right answers at about 2.5 seconds each lands just above 80 — the top grade. Nine right needs real speed to get there.
“Top %” is an estimate, not a leaderboard. It models players of different skill answering easy, medium and hard questions (about 76%, 54% and 33% right overall) in 1 to 5 seconds, and shows the share who would score at least as high as you. No one's results are stored.
Frequently asked questions
Is this just school science?
Partly — the easy questions are things most people learned once. The hard ones reach into units, chemistry and biology details that even good students forget.
Why are some answers long numbers?
A few hard questions ask for exact values, like the speed of light. The wrong options swap a digit or borrow from another constant, so you have to really know it.
Where do the general knowledge answers come from?
Government science agencies and museums: NIH and MedlinePlus, NIST, NOAA, USGS, the Smithsonian and others. Your result shows the source for every answer.