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Science Quiz: Biology, Chemistry, Physics And Space

Fifteen random questions about cells, atoms, forces, planets and the Earth, with a clear explanation after every answer.

  • 15 questions
  • About 4 min
  • Free, no sign-up
  • Based on original trivia questions with explanations

15 questions, about 4 min

Fifteen questions drawn at random from a pool of 30, covering biology, chemistry, physics, astronomy and Earth science.

Pick an answer to see straight away whether you were right, with a short explanation. Your score and the questions you missed appear at the end.

What The Quiz Covers

BranchExamples
BiologyCells, DNA, the human body, plants
ChemistryElements, formulas, pH
PhysicsLight, energy, electricity, temperature
AstronomyPlanets, the Sun, our galaxy
Earth scienceRocks, the atmosphere, earthquakes

A round is 15 questions, pulled from a bank of 30 that spans all five branches, so two rounds rarely look the same.

Answers, Explanations And Your Rating

Once you tap an option, the quiz locks it in and tells you the science behind the right answer, often with a surprising extra fact. Your final screen shows a percentage, a rating, and every question that caught you out alongside its correct answer.

ScoreRating
0% to 40%Curious mind
41% to 60%Lab assistant
61% to 80%Budding scientist
81% to 100%Science genius

Sample Questions

Which is the hottest planet in our solar system?

Venus, not Mercury. Its thick carbon dioxide atmosphere traps heat, keeping the surface at about 465 °C.

At what temperature are Celsius and Fahrenheit equal?

At minus 40.

What is the most abundant gas in the air?

Nitrogen, at about 78%. Oxygen is about 21%.

Science Myths The Quiz Might Catch

  • “Mercury is the hottest planet.” It is the closest to the Sun, but Venus is hotter because of its greenhouse atmosphere.
  • “Bees make honey from pollen.” Honey is made from nectar; pollen is mainly food for young bees.
  • “Humans have 23 chromosomes.” We have 23 pairs, which is 46 chromosomes.

Frequently Asked Questions

What level is this science quiz?

It is aimed at general audiences and roughly matches secondary school science, with a few harder questions.

Will I see the same questions if I play twice?

Probably not many. The 15 questions in each round are shuffled out of a bank of 30.

Can teachers use this quiz?

Yes. It works well as a quick revision activity, and the explanations help students learn from mistakes.

More Trivia Quizzes

Try the general knowledge quiz or the logic test.