Why Science Trivia Is Worth Your Time

Science is all around us — from the air we breathe to the devices in our pockets. Yet many of us forget the fascinating facts we learned in school. This science quiz is designed to refresh your memory, deepen your curiosity, and maybe teach you something brand new. Whether you're a science enthusiast, a student, or just a curious mind, these 30 questions will challenge you across three key disciplines.

How to Take This Quiz

Read each question, think about your answer, then reveal the answer provided. Keep track of your score:

  • 0–10: Budding scientist — keep exploring!
  • 11–20: Solid foundation — well done!
  • 21–30: Science whiz — impressive!

Biology (Questions 1–10)

  1. What is the basic unit of life? — The cell
  2. What molecule carries genetic information in living organisms? — DNA (deoxyribonucleic acid)
  3. How many chambers does the human heart have? — Four
  4. What process do plants use to make their own food using sunlight? — Photosynthesis
  5. What organ in the human body produces insulin? — The pancreas
  6. What is the longest bone in the human body? — The femur (thigh bone)
  7. How many chromosomes do humans typically have? — 46 (23 pairs)
  8. What type of organism is a mushroom? — A fungus
  9. What does "RNA" stand for? — Ribonucleic acid
  10. Which blood type is known as the universal donor? — O negative (O−)

Chemistry (Questions 11–20)

  1. What is the chemical formula for water? — H₂O
  2. How many elements are on the periodic table (as of recent updates)? — 118
  3. What is the most abundant gas in Earth's atmosphere? — Nitrogen (about 78%)
  4. What type of bond involves the sharing of electrons between atoms? — Covalent bond
  5. What is the pH of a neutral substance? — 7
  6. Which metal is liquid at room temperature? — Mercury
  7. What is the chemical symbol for sodium? — Na
  8. What is the process of a liquid turning into a gas called? — Evaporation (or vaporisation)
  9. What do you call a substance that speeds up a chemical reaction without being consumed? — A catalyst
  10. What gas is produced when an acid reacts with a metal? — Hydrogen

Physics (Questions 21–30)

  1. What is the unit of electrical resistance? — Ohm (Ω)
  2. What force keeps planets in orbit around the sun? — Gravity
  3. What is Newton's first law of motion commonly called? — The law of inertia
  4. What type of energy does a moving object possess? — Kinetic energy
  5. What is the speed of sound in air at room temperature (approx.)? — 343 metres per second
  6. What particle has a negative charge? — An electron
  7. What does E=mc² represent? — Energy equals mass times the speed of light squared (mass-energy equivalence)
  8. What is the unit of frequency? — Hertz (Hz)
  9. What colour has the longest wavelength in the visible spectrum? — Red
  10. What instrument is used to measure atmospheric pressure? — A barometer

Want to Learn More?

Science trivia is a fantastic way to stay sharp and maintain a love of learning. If you found certain questions tricky, that's a great opportunity to dive deeper into that subject. Reading science articles, watching documentaries, or even revisiting school textbooks can transform quiz performance — and more importantly, your understanding of the world.