🔬 Science Trivia Questions & Answers
Physics, chemistry, biology, discoveries, inventions, and Nobel laureates. Below are 50 free science trivia questions with answers. Want a real challenge that adapts to what you know? Play the Science quiz on BUZZ — no signup needed to start.
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50 Science trivia questions
Q1. Who discovered two elements and is the only person to win Nobel Prizes in two different sciences?
Answer: Marie Curie
💡 Curie won the Physics prize in 1903 and the Chemistry prize in 1911, for radioactivity and for discovering radium and polonium.
Q2. Whose gravity theory was supposedly sparked by a falling apple at Woolsthorpe Manor?
Answer: Isaac Newton
💡 Newton developed many of his core ideas on gravity and motion during 1665-1667 while Cambridge was closed for the plague.
Q3. Which patent clerk published his special relativity theory in 1905 from a Swiss patent office?
Answer: Albert Einstein
💡 1905 is called Einstein's 'miracle year' — he published four groundbreaking papers while still working as a patent examiner in Bern.
Q4. Which primatologist studied Gombe chimps in 1960 and saw one fish termites with a stick?
Answer: Jane Goodall
💡 Her discovery of tool use in a chimp named David Greybeard overturned the idea that only humans could make and use tools.
Q5. Which organ pumps blood around the human body?
Answer: Heart
💡 The human heart beats about 100,000 times a day and pumps around 2,000 gallons of blood. Over a lifetime, it beats more than 2.5 billion times.
Q6. What is the chemical symbol for the element sodium?
Answer: Na
💡 Na comes from natrium, sodium's Latin name and the root behind natron, an ancient salt.
Q7. Which of these is by far the most common state of matter in the universe?
Answer: Plasma
💡 Stars are giant balls of plasma, so over 99% of the visible universe isn't solid, liquid, or gas.
Q8. Which gas makes up roughly a fifth of the air and is needed for things to burn?
Answer: Oxygen
💡 Oxygen itself doesn't burn; it's the reactant that lets other fuels combust.
Q9. What do physicists call any push or pull that can change an object's motion?
Answer: Force
💡 Forces are measured in newtons; a small apple weighs roughly one newton in your hand.
Q10. Which kind of energy does any moving object carry?
Answer: Kinetic energy
💡 Double a car's speed and its kinetic energy quadruples, which is why fast crashes are so violent.
Q11. Which rock type forms when molten magma or lava cools and hardens?
Answer: Igneous rock
💡 The word 'igneous' comes from the Latin 'ignis', meaning fire.
Q12. Wispy, feathery cirrus clouds high in the sky are made of what?
Answer: Ice crystals
💡 Cirrus can form six miles up where it is so cold that water skips straight to ice.
Q13. What word describes the amount of water vapour present in the air?
Answer: Humidity
💡 Warm air can hold far more water vapour than cold air, which is why summer feels muggier.
Q14. Whose 1911 gold-foil experiment revealed the atom has a tiny, dense nucleus?
Answer: Ernest Rutherford
💡 He was stunned when a few particles bounced back, like firing a shell at tissue paper and having it rebound.
Q15. Who discovered the neutron in 1932, the neutral partner of the proton?
Answer: James Chadwick
💡 His neutral particle could slip into nuclei unrepelled, opening the door to nuclear fission a few years later.
Q16. Who discovered the electron in 1897 while experimenting with cathode rays?
Answer: J.J. Thomson
💡 It was the first subatomic particle ever found; seven of his research assistants went on to win Nobels too.
Q17. Who proposed modern atomic theory and first scientifically studied colour blindness?
Answer: John Dalton
💡 He was colour-blind himself; the condition is still nicknamed 'Daltonism' in his honour.
Q18. A star far more massive than the Sun can collapse at the end of its life into what?
Answer: A black hole
💡 Stars over roughly 20 times the Sun's mass can leave a black hole behind after a supernova.
Q19. What is the basic structural and functional unit of every living organism?
Answer: Cell
💡 Your body is built from roughly 37 trillion cells.
Q20. What is the speed of light in a vacuum approximately?
Answer: 300,000 km/s
💡 Light from the Sun takes about 8 minutes to reach Earth.
Q21. What planet is known as the Red Planet?
Answer: Mars
💡 Mars appears red because its surface is covered in iron oxide — essentially rust.
Q22. What is the chemical formula for water?
Answer: H₂O
💡 Water is the only substance on Earth that naturally exists in all three states: solid, liquid, and gas.
Q23. Which planet has the most moons?
Answer: Saturn
💡 Saturn has over 140 confirmed moons as of 2024, surpassing Jupiter.
Q24. What planet is closest to the Sun?
Answer: Mercury
💡 Despite being closest to the Sun, Mercury is not the hottest planet — Venus is, due to its thick atmosphere.
Q25. What is the largest organ in the human body?
Answer: Skin
💡 The average adult's skin covers approximately 1.7 square metres.
Q26. What is the atomic number of carbon?
Answer: 6
💡 Carbon forms the backbone of all known life on Earth and can form millions of different compounds.
Q27. How long does light from the Sun take to reach Earth?
Answer: About 8 minutes
💡 If the Sun suddenly disappeared, Earth would continue to orbit its current position for about 8 minutes.
Q28. What is the chemical symbol for Gold?
Answer: Au
💡 Au comes from the Latin word 'aurum' meaning gold.
Q29. What does DNA code for?
Answer: Proteins
💡 DNA contains genes, which are instructions for making proteins that carry out cellular functions.
Q30. What is the chemical formula for table salt?
Answer: NaCl
💡 Table salt (sodium chloride) was historically so valuable that Roman soldiers were sometimes paid in it — the origin of the word 'salary'.
Q31. What is the boiling point of water at sea level in Celsius?
Answer: 100°C
💡 Water boils at a lower temperature at higher altitudes because atmospheric pressure decreases.
Q32. What does pH measure in a liquid?
Answer: Acidity or alkalinity
💡 pH stands for 'potential of hydrogen'. A pH of 7 is neutral; below 7 is acidic, above 7 is alkaline.
Q33. What is the closest star to Earth after the Sun?
Answer: Proxima Centauri
💡 Proxima Centauri is about 4.24 light-years away and is part of the Alpha Centauri triple-star system.
Q34. Per Alexander Graham Bell's notebook, what were the first words spoken by phone on March 10, 1876?
Answer: Mr. Watson, come here, I want to see you
💡 He was just calling his assistant, Thomas Watson, in another room — the line that changed global communication was pure small talk.
Q35. Which single muscle claims the title of largest in the human body by sheer bulk?
Answer: Gluteus maximus
💡 This muscle in your buttocks is what allows humans to stand fully upright for long periods — other primates have much flatter hips and can't sustain it the way we do.
Q36. Wisdom teeth are formally known by which name, for their spot at the back of the jaw?
Answer: Third molars
💡 They're nicknamed 'wisdom teeth' because they typically erupt in the late teens or early twenties, an age when a person is presumably a bit wiser than when their baby teeth came in.
Q37. The SI unit of energy honors which English physicist who studied heat's mechanical equivalent?
Answer: James Prescott Joule
💡 One joule is a tiny amount of energy — about what it takes to lift a small apple one metre straight up. Your phone charger moves thousands of them every second.
Q38. Which type of friction has to be overcome first before a stationary object will even start sliding?
Answer: Static friction
💡 Static friction is usually the stronger of the two — that's why a heavy box feels hardest to move in the very first instant, then suddenly gets easier to keep sliding once kinetic friction takes over.
Q39. Which simple machine did Archimedes mean, boasting he could move Earth with a long enough one?
Answer: The lever
💡 Archimedes had worked out mechanical advantage: the longer the arm on the effort side of a lever's fulcrum, the less force it takes to shift a huge load on the other side — in theory, at least, given an impossibly long bar.
Q40. Which thin stratospheric layer absorbs most harmful UVB rays before they reach ground?
Answer: The ozone layer
💡 Thanks to international bans on ozone-depleting chemicals, scientists expect the ozone layer to fully recover by around 2065.
Q41. Which Earth layer is biggest — over 1,800 miles thick and made of hot, semi-solid rock?
Answer: The mantle
💡 Earth's crust, by contrast, is a thin skin — only about 3 to 44 miles deep depending on whether it's oceanic or continental crust.
Q42. Whose evolution theory was shaped by a five-year HMS Beagle voyage via the Galapagos?
Answer: Charles Darwin
💡 Darwin was just 22 when he set sail on the Beagle in December 1831, and didn't publish On the Origin of Species until 1859.
Q43. Returning from holiday in 1928, Fleming saw a stray mould killing bacteria — what had he found?
Answer: Penicillin
💡 Alexander Fleming didn't grasp the full medical potential himself — it took Howard Florey and Ernst Chain a decade later to develop it into a usable drug.
Q44. Diagnosed with motor neurone disease at 21, which physicist wrote 'A Brief History of Time'?
Answer: Stephen Hawking
💡 Hawking lived more than 50 years after his diagnosis, and his book spent a record 237 weeks on the Sunday Times bestseller list.
Q45. Which Austrian monk bred nearly 30,000 pea plants to work out inheritance's basic rules?
Answer: Gregor Mendel
💡 Mendel's work was largely ignored during his lifetime and only became famous roughly 16 years after his death in 1884.
Q46. What type of animal is a dolphin?
Answer: Mammal
💡 Dolphins are warm-blooded mammals that breathe air, give birth to live young, and nurse their calves with milk — just like humans.
Q47. What is H₂O₂ commonly called?
Answer: Hydrogen peroxide
💡 Hydrogen peroxide looks just like water but is far more reactive. Even a small concentration fizzes visibly when it meets organic matter.
Q48. Which organ produces insulin?
Answer: Pancreas
💡 The pancreas produces insulin to regulate blood sugar. In type 1 diabetes, the immune system destroys the insulin-producing cells.
Q49. How many chromosomes do humans normally have?
Answer: 46
💡 Humans have 23 pairs of chromosomes (46 total). Chromosome 21 trisomy causes Down syndrome. Dogs have 78 chromosomes.
Q50. What is the name of the first artificial Earth satellite launched by the USA?
Answer: Explorer 1
💡 Explorer 1 was launched in January 1958, four months after Sputnik 1. It discovered the Van Allen radiation belts surrounding Earth.
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