DayQuizzDaily science quiz
Ten science questions a day across biology, chemistry, physics, earth science, space and technology. They test useful understanding, not memorized jargon.
10 questions~2 minutesNew every dayFree · no download
▶ Play today's Science quizWhat the Science quiz covers
- Biology and the human body
- Chemistry in everyday life
- Physics: forces, energy, light and sound
- Earth science and weather
- Space and astronomy
- Technology and how things work
Try 3 questions from Friday's quiz
Tap a question to see the answer.
The gas most common in Earth's atmosphere is _____ (87). (oxygen · nitrogen · carbon dioxide · argon)
Answer: nitrogen · The gas most common in Earth's atmosphere is nitrogen (87).
The chemical symbol for nitrogen is _____. (Au · N · Ag · Na)
Answer: N · The chemical symbol for nitrogen is N.
The chemical symbol for lead is _____. (K · C · N · Pb)
Answer: Pb · The chemical symbol for lead is Pb.
All of that day's questions: Science answers for Friday, October 2, 2026.
Who it's for
For curious minds of every age (13+), students reviewing the basics, and parents who want to keep up with homework questions.
How a round works
- 10 questions, about 2 minutes. A new set goes live every day, and everyone gets the same one.
- Easy or HARD. Easy gives you 4 choices. HARD gives you none: type the answer for double points.
- 15 seconds per question. After that you can still answer, but you can't win points.
- Points by difficulty: +1 / +2 / +3 🔥 for a right answer, −3 / −2 / −1 for a wrong one. Guessing has a price.
- Streaks, leaderboards and groups: one right answer a day keeps your streak alive.
Questions
Are the science questions school-level?
Most are general-knowledge science that a curious adult or teenager can answer, with harder questions mixed in for extra points.
Is there a space or astronomy quiz?
Space questions appear in Science regularly, and "Space" is also one of the Daily Theme topics.
Is the Science quiz free?
Yes. Play any one subject a day for free, as a guest or with a free account. SERIOUS unlocks every subject, every day.