Science trivia is the round that turns a quiz into a conversation. One question about octopus hearts or how fat leaves your body, and suddenly the whole room is debating biology. Whether you are a teacher looking for a lesson starter, a quizmaster building a pub round or a parent planning a family game night, these science trivia questions cover space, the human body, chemistry, physics and the natural world.
We have split the 60 questions into an easy round of 25, a hard round of 25 and a fill-in-the-blank bonus round of 10, with every answer right beneath its question. Science moves on (Saturn keeps gaining moons, for one), so we re-checked every answer in September 2026 against sources such as NASA and NOAA, and corrected a few that older quiz lists still get wrong.
Easy science trivia questions
Start here with younger players or a mixed crowd. Most of these come up in school science lessons. Our pick: “How many hearts does an octopus have?”, because hardly anyone believes the answer the first time.
Space and astronomyερωτήσεις 7
1Which Apollo mission was the first to carry a lunar rover to the Moon?
ΑπάντησηApollo 15, in 1971.
2What was the name of the first artificial satellite, launched by the Soviet Union in 1957?
ΑπάντησηΣπούτνικ 1.
3Which dog, launched on Sputnik 2 on 3 November 1957, became the first animal to orbit the Earth?
ΑπάντησηΛάικα.
4Ποια ήταν η πρώτη γυναίκα στο διάστημα;
ΑπάντησηValentina Tereshkova, in 1963.
5Which astronomer proposed that the Sun, not the Earth, sits at the centre of our solar system?
ΑπάντησηΝικόλαος Κοπέρνικος.
6Which planet spins the fastest, completing one rotation in about 10 hours?
ΑπάντησηΖεύς.
7Roughly how long does sunlight take to reach Earth: 8 minutes, 8 hours or 8 days?
ΑπάντησηΣχετικά με τα λεπτά 8.
Το ανθρώπινο σώμαερωτήσεις 7
8Of the eight main blood types, which is the rarest worldwide?
ΑπάντησηAB negative.
9Where in the human body are the smallest bones?
ΑπάντησηThe middle ear.
10How many teeth does a full adult set have, including wisdom teeth?
Απάντηση32.
11True or false: your hair and your nails are made from the same protein.
ΑπάντησηTrue. Both are made of keratin.
12Where on the body is skin most densely packed with sweat glands?
ΑπάντησηThe soles of the feet.
13How many bones are in the adult human body?
Απάντηση206.
14What is the process of breaking down food in the body called?
ΑπάντησηΠέψη.
Animals and the Earthερωτήσεις 5
15What are the three main layers of the Earth?
ΑπάντησηThe crust, the mantle and the core.
16Σε ποια ομάδα ζώων ανήκουν οι βάτραχοι;
ΑπάντησηAmphibians.
17How many bones does a shark have?
ΑπάντησηNone. A shark’s skeleton is made of cartilage.
18Πόσες καρδιές έχει ένα χταπόδι;
ΑπάντησηΤρία.
19Μπορεί ο κεραυνός να χτυπήσει δύο φορές το ίδιο μέρος;
ΑπάντησηYes. Tall buildings are struck many times a year.
Physics, chemistry and inventionsερωτήσεις 6
20Τι είναι η μελέτη της οπτικής;
ΑπάντησηΦως.
21Τι σημαίνει το DNA;
ΑπάντησηDeoxyribonucleic acid.
22Who is usually credited with inventing the telephone?
ΑπάντησηΑλεξάντερ Γκράχαμ μπελλ.
23True or false: sound travels faster in air than in water.
ΑπάντησηFalse. Sound travels about four times faster in water.
24Ποια είναι η πιο σκληρή φυσική ουσία στη Γη;
ΑπάντησηΔιαμάντι.
25What is the scientific word for a push or a pull?
ΑπάντησηΔύναμη.
Hard science trivia questions
Ready for a challenge? These difficult science questions suit older students, science fans and competitive quiz teams. Our pick: “When you lose body fat, how does most of it leave your body?”, a question most adults get wrong.
Space and the planetερωτήσεις 5
26Which planet has the most confirmed moons?
ΑπάντησηSaturn. NASA lists 293 επιβεβαιωμένα φεγγάρια as of August 2026, far more than any other planet.
27Space travellers from the United States are called astronauts, and from Russia, cosmonauts. Where do taikonauts come from?
ΑπάντησηΚίνα.
28Olympus Mons, the tallest volcano in the solar system, is on which planet?
ΑπάντησηΑρης.
29What is the deepest known point in the Earth’s oceans?
ΑπάντησηThe Challenger Deep, in the Mariana Trench, about Βάθος 10,935 μέτρα.
30Which gas makes up most of the Earth’s atmosphere?
ΑπάντησηNitrogen, at about 78%.
The body and medicineερωτήσεις 8
31Which bone in the human body is not joined to any other bone?
ΑπάντησηThe hyoid bone, in the neck.
32Which part of the human body is the axilla?
ΑπάντησηThe armpit.
33When you lose body fat, how does most of it leave your body?
ΑπάντησηThrough your breath. Research in the BMJ found around 84% is breathed out as carbon dioxide, and the rest leaves as water.
34Which lobe of the brain deals mainly with hearing and language?
ΑπάντησηThe temporal lobe.
35Bright’s disease affects which organ?
ΑπάντησηThe kidneys.
36What is a muscle called when it assists the movement of another muscle?
ΑπάντησηA synergist.
37Which ancient Greek physician is often called the father of medicine?
ΑπάντησηΙπποκράτης.
38What is the largest part of the human brain?
ΑπάντησηThe cerebrum.
Animals and life scienceερωτήσεις 6
39Animals that are most active at dawn and dusk are called what?
ΑπάντησηCrepuscular.
40A group of which big cat is called an “ambush”?
ΑπάντησηΤίγρεις.
41Which North American canine is known for climbing trees?
ΑπάντησηThe grey fox.
42True or false: chameleons change colour only to blend into their surroundings.
ΑπάντησηFalse. They also change colour to communicate and to control their body temperature.
43Which islands did Charles Darwin famously study?
ΑπάντησηΤα Νησιά Γκαλαπάγκος.
44What do you call a scientist who studies fossils and prehistoric life, such as dinosaurs?
ΑπάντησηA palaeontologist.
Φυσική και χημείαερωτήσεις 6
45Σε ποια θερμοκρασία είναι ίσοι οι Κελσίου και Φαρενάιτ;
Απάντηση-40 βαθμοί.
46Which four precious metals are most widely traded?
ΑπάντησηGold, silver, platinum and palladium.
47What name is given to the claim that hot water can sometimes freeze faster than cold water?
ΑπάντησηThe Mpemba effect. Scientists still debate when, and whether, it reliably happens.
48Which colour has the longest wavelength in the visible spectrum?
ΑπάντησηEd.
49Which American scientist built an early electromagnetic telegraph in 1831 and gave his name to the SI unit of inductance?
ΑπάντησηJoseph Henry.
50Which is the only metal that is liquid at room temperature?
ΑπάντησηΟ υδράργυρος.
Bonus round: fill-in-the-blank science questions
Not enough science yet? Try these fill-in-the-blank questions as a tie-breaker or a quick-fire final round. Players have to recall the word rather than recognise it, which makes them harder than they look.
Physics and the Earthερωτήσεις 4
51The Earth takes about _ hours to spin once on its axis relative to the Sun.
Απάντηση24.
52The speed of light in a vacuum is about _ kilometres per second.
Απάντηση299,792.
53The force that opposes motion between two surfaces is called _.
ΑπάντησηΤριβή.
54The coldest air temperature ever officially recorded on Earth is _.
Απάντηση-89.2°C (-128.6°F), at Vostok Station, Antarctica, on 21 July 1983, according to the Παγκόσμιος Μετεωρολογικός Οργανισμός.
Chemistry and lifeερωτήσεις 6
55The chemical formula for carbon dioxide is _.
ΑπάντησηCO2
56The process plants use to turn sunlight, water and carbon dioxide into food is called _.
ΑπάντησηΦωτοσύνθεση.
57The three everyday states of matter are _, _ and _.
ΑπάντησηSolid, liquid and gas.
58A chemical reaction that releases heat is called an _ reaction.
ΑπάντησηExothermic.
59A mixture in which one substance dissolves evenly into another is called a _.
ΑπάντησηΛύση.
60A substance’s ability to resist changes in pH is called its _ _.
ΑπάντησηΧωρητικότητα ενδιάμεσης αποθήκευσης.
How to make a free science trivia quiz
A quick quiz at the start or end of a lesson is one of the easiest ways to help students recall what they have learnt. Here is how to turn these questions into a live game on AhaSlides.
- Εγγραφείτε για έναν δωρεάν λογαριασμό AhaSlides.
- Create a new presentation, or start from a science quiz in the template library.
- Add quiz slides and paste in the questions above. Pick Answer slides work well for multiple choice and true or false, and Short Answer slides suit the fill-in-the-blank round, because players type the word instead of choosing it.
- Click Present. Students join by scanning the QR code or entering the join code on their phones, and answer in real time. You can also switch the quiz to self-paced so they can play in their own time.
When we run science rounds in our own live sessions, the questions that overturn something people learnt years ago, such as how fat leaves the body or which planet has the most moons, spark the most discussion once the answer appears. Reveal the results chart before you give the answer, and let the room argue for a moment first.
Finish with the leaderboard so the top team gets its moment.
Ψάχνετε για περισσότερα; Δοκιμάστε το δικό μας trivia για μαθητές γυμνασίου, ερωτήσεις γενικών γνώσεων για παιδιά or κουίζ γεωγραφίας.
Συχνές ερωτήσεις
What are good science trivia questions for kids?
Start with questions linked to everyday life and school topics: how many hearts an octopus has, whether sharks have bones, or how many bones are in the human body. Most of the easy round above suits children aged around 10 and up, and our trivia questions for tweens mix science with other subjects.
How do you make science trivia harder?
Ask for specific terms rather than general ideas (crepuscular, synergist, the Challenger Deep), include myth-busting questions where the common answer is wrong, and use fill-in-the-blank questions so players cannot guess from a list of options.
How many questions should a science quiz have?
For a lesson starter, 5 to 10 questions take under ten minutes. For a quiz night, three rounds of 10 to 15 questions, rising in difficulty, works well.
