Biology & life sciences
Biology questions hit hardest when they upend something everyone assumes is true.
Q1.What does the letter 'S' stand for in 'NASA'?Tap to reveal
Answer: Space
Sourced from Open Trivia DB (CC BY-SA 4.0). Difficulty: Easy.
Q2.About what percentage of the Earth's surface is water?Tap to reveal
Answer: 70%
Sourced from Open Trivia DB (CC BY-SA 4.0). Difficulty: Easy.
Q3.The medical term for the belly button is which of the following?Tap to reveal
Answer: Umbilicus
Sourced from Open Trivia DB (CC BY-SA 4.0). Difficulty: Easy.
Q4.What is the standard SI unit for luminous intensity?Tap to reveal
Answer: Candela
Sourced from Open Trivia DB (CC BY-SA 4.0). Difficulty: Hard.
Q5.What is the powerhouse of the cell?Tap to reveal
Answer: Mitochondria
Sourced from Open Trivia DB (CC BY-SA 4.0). Difficulty: Easy.
Q6.The 'Islets of Langerhans' is found in which human organ?Tap to reveal
Answer: Pancreas
Sourced from Open Trivia DB (CC BY-SA 4.0). Difficulty: Hard.
Q7.The Axiom of Preventive Medicine states that people with ___ risk for a disease should be screened and we should treat ___ of those people.Tap to reveal
Answer: low, all
Sourced from Open Trivia DB (CC BY-SA 4.0). Difficulty: Medium.
Q8.How much radiation does a banana emit?Tap to reveal
Answer: 0.1 Microsievert
Sourced from Open Trivia DB (CC BY-SA 4.0). Difficulty: Hard.
Q9.What is the Linnean name of the domestic apple tree?Tap to reveal
Answer: Malus pumila
Sourced from Open Trivia DB (CC BY-SA 4.0). Difficulty: Medium.
Q10.What term is best associated with Sigmund Freud?Tap to reveal
Answer: Psychoanalysis
Sourced from Open Trivia DB (CC BY-SA 4.0). Difficulty: Medium.
Chemistry & elements
Chemistry trivia rewards people who remember the periodic table — or who notice the surprising properties of everyday materials.
Q1.Autosomal-dominant Compelling Helio-Ophthalmic Outburst syndrome is the need to do what when seeing the Sun?Tap to reveal
Answer: Sneeze
Sourced from Open Trivia DB (CC BY-SA 4.0). Difficulty: Hard.
Q2.Which of the following is considered classical conditioning?Tap to reveal
Answer: Pavlov's dog experiments
Sourced from Open Trivia DB (CC BY-SA 4.0). Difficulty: Hard.
Q3.How many hearts does an octopus have?Tap to reveal
Answer: Three
Sourced from Open Trivia DB (CC BY-SA 4.0). Difficulty: Medium.
Q4.Which of these bones is hardest to break?Tap to reveal
Answer: Femur
Sourced from Open Trivia DB (CC BY-SA 4.0). Difficulty: Easy.
Q5.In the Scoville scale, what is the hottest chemical?Tap to reveal
Answer: Resiniferatoxin
Sourced from Open Trivia DB (CC BY-SA 4.0). Difficulty: Hard.
Q6.How many baby/milk teeth does a human child have in total?Tap to reveal
Answer: 20
Sourced from Open Trivia DB (CC BY-SA 4.0). Difficulty: Medium.
Q7.Which horizon in a soil profile consists of bedrock?Tap to reveal
Answer: R
Sourced from Open Trivia DB (CC BY-SA 4.0). Difficulty: Hard.
Q8.What was the first organic compound to be synthesized from inorganic compounds?Tap to reveal
Answer: Urea
Sourced from Open Trivia DB (CC BY-SA 4.0). Difficulty: Hard.
Q9.Which of the following is NOT a word used to describe an earthquake?Tap to reveal
Answer: Drop-slide
Sourced from Open Trivia DB (CC BY-SA 4.0). Difficulty: Hard.
Q10.Which country first successfully farm-hatched and raised bluefin tuna in 1979?Tap to reveal
Answer: Japan
Sourced from Open Trivia DB (CC BY-SA 4.0). Difficulty: Hard.
Physics & math basics
Physics questions test whether you remember the rules of how things move, fall, and interact. These ones don't require formulas.
Q1.How many objects are equivalent to one mole?Tap to reveal
Answer: 6.022 x 10^23
Sourced from Open Trivia DB (CC BY-SA 4.0). Difficulty: Hard.
Q2.Dry ice is the solid form of what substance?Tap to reveal
Answer: Carbon dioxide
Sourced from Open Trivia DB (CC BY-SA 4.0). Difficulty: Easy.
Q3.Which gas forms about 78% of the Earth’s atmosphere?Tap to reveal
Answer: Nitrogen
Sourced from Open Trivia DB (CC BY-SA 4.0). Difficulty: Easy.
Q4.Which element has the highest melting point?Tap to reveal
Answer: Carbon
Sourced from Open Trivia DB (CC BY-SA 4.0). Difficulty: Easy.
Q5.What are the smallest blood vessels in the human body?Tap to reveal
Answer: Capillaries
Sourced from Open Trivia DB (CC BY-SA 4.0). Difficulty: Medium.
Q6.What is the scientific name of the knee cap?Tap to reveal
Answer: Patella
Sourced from Open Trivia DB (CC BY-SA 4.0). Difficulty: Hard.
Q7.How many planets are there in the Solar System?Tap to reveal
Answer: 8
Sourced from Open Trivia DB (CC BY-SA 4.0). Difficulty: Easy.
Q8.Which of the following elements is typically used in the doping of the semiconductor silicon?Tap to reveal
Answer: Boron
Sourced from Open Trivia DB (CC BY-SA 4.0). Difficulty: Hard.
Q9.What does the yellow diamond on the NFPA 704 fire diamond represent?Tap to reveal
Answer: Reactivity
Sourced from Open Trivia DB (CC BY-SA 4.0). Difficulty: Medium.
Q10.What does the term "isolation" refer to in microbiology?Tap to reveal
Answer: The separation of a strain from a natural, mixed population of living microbes
Sourced from Open Trivia DB (CC BY-SA 4.0). Difficulty: Hard.
Astronomy & space
Astronomy trivia is the most awe-inspiring category — the answers usually involve numbers so big they reset your sense of scale.
Q1.Which of these choices is not one of the phases of mitosis?Tap to reveal
Answer: Diplophase
Sourced from Open Trivia DB (CC BY-SA 4.0). Difficulty: Medium.
Q2.The moons, Miranda, Ariel, Umbriel, Titania and Oberon orbit which planet?Tap to reveal
Answer: Uranus
Sourced from Open Trivia DB (CC BY-SA 4.0). Difficulty: Medium.
Q3.What is the standard SI unit for distance?Tap to reveal
Answer: Metre
Sourced from Open Trivia DB (CC BY-SA 4.0). Difficulty: Easy.
Q4.How many officially recognized dwarf planets in the solar system are named after Polynesian deities?Tap to reveal
Answer: 2
Sourced from Open Trivia DB (CC BY-SA 4.0). Difficulty: Medium.
Q5.The human heart has how many chambers?Tap to reveal
Answer: 4
Sourced from Open Trivia DB (CC BY-SA 4.0). Difficulty: Easy.
Q6.Burning which of these metals will produce a bright white flame?Tap to reveal
Answer: Magnesium
Sourced from Open Trivia DB (CC BY-SA 4.0). Difficulty: Hard.
Q7.Which of these is a type of stretch/deep tendon reflex?Tap to reveal
Answer: Ankle jerk reflex
Sourced from Open Trivia DB (CC BY-SA 4.0). Difficulty: Medium.
Q8.What is the largest living organism currently known to man?Tap to reveal
Answer: Honey Fungus
Sourced from Open Trivia DB (CC BY-SA 4.0). Difficulty: Medium.
Q9.Which of these is a semiconductor amplifying device?Tap to reveal
Answer: transistor
Sourced from Open Trivia DB (CC BY-SA 4.0). Difficulty: Hard.
Q10.A comet's gaseous envelope (which creates the tail) is called what?Tap to reveal
Answer: The coma
Sourced from Open Trivia DB (CC BY-SA 4.0). Difficulty: Hard.
Earth science & geology
Earth science trivia explains the planet under your feet — questions where the answer reveals something about the place you live.
Q1.What is the standard SI unit for electric current?Tap to reveal
Answer: Ampere
Sourced from Open Trivia DB (CC BY-SA 4.0). Difficulty: Medium.
Q2.What is the atomic number of UraniumTap to reveal
Answer: 92
Sourced from Open Trivia DB (CC BY-SA 4.0). Difficulty: Medium.
Q3.What is the unit of electrical capacitance?Tap to reveal
Answer: Farad
Sourced from Open Trivia DB (CC BY-SA 4.0). Difficulty: Medium.
Q4.Botanically speaking, which of these fruits is NOT a berry?Tap to reveal
Answer: Strawberry
Sourced from Open Trivia DB (CC BY-SA 4.0). Difficulty: Hard.
Q5.Which of these is NOT a part of the structure of a typical neuron?Tap to reveal
Answer: Islets of Langerhans
Sourced from Open Trivia DB (CC BY-SA 4.0). Difficulty: Medium.
Q6.Which of the following is a major muscle of the back?Tap to reveal
Answer: Trapezius
Sourced from Open Trivia DB (CC BY-SA 4.0). Difficulty: Hard.
Q7.What is the hottest planet in the Solar System?Tap to reveal
Answer: Venus
Sourced from Open Trivia DB (CC BY-SA 4.0). Difficulty: Easy.
Q8.What is the mathematical formula of Ohm's law?Tap to reveal
Answer: V = I*R
Sourced from Open Trivia DB (CC BY-SA 4.0). Difficulty: Medium.
Q9.All of the following human genetic haplogroup names are shared between Y-chromosome and mitochondrial DNA haplogroups EXCEPT:Tap to reveal
Answer: Haplogroup U
Sourced from Open Trivia DB (CC BY-SA 4.0). Difficulty: Hard.
Q10.How many moons does the Earth have?Tap to reveal
Answer: 1
Sourced from Open Trivia DB (CC BY-SA 4.0). Difficulty: Easy.
Why science trivia hits different
Most trivia categories test recall. Science trivia tests understanding — when you know the answer to "how many hearts does an octopus have", the FACT is interesting, but the EXPLANATION is what sticks. Daily exposure to science trivia is how curious people stay curious.
The Trivio.NET app delivers a fresh daily quiz with science questions mixed in. 10 questions, 100 seconds. Free, no ads in the way.
Frequently Asked Questions
Are these science trivia questions for adults or kids?
Mixed. The biology and astronomy questions work for ages 8+. Chemistry and physics are slightly older. Mark difficulty for your specific audience.
How can I make science trivia more visual?
Use images alongside questions — periodic table reference, solar system diagrams, anatomy charts. Multi-modal trivia engages more than text-only.
Where can I find more science trivia question packs?
Trivio.NET's Science category has 64+ quiz packs covering biology, chemistry, physics, astronomy and earth science.
What's the most surprising science trivia answer?
Most people are shocked that octopuses have 3 hearts, water transmits sound faster than air, and there are more bacteria on a phone than a toilet seat.
