100 Science Trivia Questions & Answers for Students

Biology Trivia — 25 Questions

1. What is the basic unit of life? (Cell)
2. What organ filters blood in the human body? (Kidneys)
3. How many chromosomes do humans normally have? (46 — in 23 pairs)
4. What is the longest bone in the human body? (Femur / thigh bone)
5. What blood cells fight infection? (White blood cells / leukocytes)
6. Which organ produces bile? (Liver)
7. What is the scientific name for the study of plants? (Botany)
8. How many chambers does the human heart have? (4)
9. What is the powerhouse of the cell? (Mitochondria)
10. What type of blood vessel carries blood away from the heart? (Artery)
11. What is the largest organ in the human body? (Skin)
12. What carries oxygen in red blood cells? (Hemoglobin)
13. What is the name of the process by which organisms produce offspring? (Reproduction)
14. What is the study of fungi called? (Mycology)
15. Which animal has the most powerful bite force? (Saltwater Crocodile)
16. What is the fluid that surrounds and protects the brain? (Cerebrospinal fluid)
17. How many bones are in the human hand? (27)
18. What is the scientific name for the knee cap? (Patella)
19. What is the most common element in the human body by mass? (Oxygen — 65%)
20. What protein makes hair and nails? (Keratin)
21. What is the average human body temperature in Celsius? (37°C)
22. Which part of the brain controls balance? (Cerebellum)
23. What type of reproduction requires only one parent? (Asexual reproduction)
24. What is the medical term for a broken bone? (Fracture)
25. What is the human genome? (The complete set of DNA / genetic information in a human cell)

Chemistry Trivia — 25 Questions

1. What is the chemical formula for table salt? (NaCl)
2. What is the most reactive metal? (Cesium or Francium)
3. What is pH 7 considered? (Neutral)
4. What is the chemical symbol for silver? (Ag)
5. What gas is produced by burning hydrocarbons? (Carbon dioxide and water vapor)
6. What is the most abundant metal in Earth's crust? (Aluminum)
7. What is the process of a solid turning directly into a gas? (Sublimation)
8. What does the atomic number of an element represent? (Number of protons in the nucleus)
9. What is the chemical symbol for potassium? (K — from Latin Kalium)
10. What is an isotope? (An atom with the same number of protons but different neutrons)
11. What is the most abundant gas in Earth's atmosphere? (Nitrogen — 78%)
12. What is the chemical formula for carbon dioxide? (CO₂)
13. What is the hardest substance in the human body? (Tooth enamel)
14. What is the periodic table organized by? (Atomic number — number of protons)
15. What is an exothermic reaction? (A reaction that releases heat/energy)
16. What is ozone's chemical formula? (O₃)
17. Which planet has an atmosphere of mostly carbon dioxide? (Venus — and Mars)
18. What is the lightest element? (Hydrogen)
19. What is the chemical symbol for lead? (Pb — from Latin Plumbum)
20. What is rust chemically? (Iron oxide — Fe₂O₃)
21. How many protons does carbon have? (6)
22. What is the name of the scale used to measure acidity? (pH scale)
23. What element has the symbol Na? (Sodium — from Latin Natrium)
24. What is the densest naturally occurring element? (Osmium)
25. What type of bond involves sharing electrons? (Covalent bond)

Physics Trivia — 25 Questions

1. What is the SI unit of force? (Newton)
2. What does E=mc² mean? (Energy = mass × speed of light squared — mass-energy equivalence)
3. What is the speed of sound in air? (~343 m/s at room temperature)
4. What type of energy does a moving object have? (Kinetic energy)
5. What is the unit of electric current? (Ampere / Amp)
6. What is the force that keeps planets in orbit? (Gravity)
7. What is the unit of electrical power? (Watt)
8. What is absolute zero in Celsius? (-273.15°C)
9. What is refraction? (Bending of light when it passes from one medium to another)
10. What particle has no charge? (Neutron)
11. What is the unit of frequency? (Hertz — Hz)
12. What is terminal velocity? (The constant maximum speed reached when drag force equals gravitational force)
13. What is the Doppler effect? (Change in frequency of a wave as the source moves relative to the observer)
14. What is potential energy? (Stored energy based on position — e.g., a raised object)
15. Who developed the theory of general relativity? (Albert Einstein, 1915)
16. What is a black hole? (A region of spacetime with gravity so strong nothing can escape, not even light)
17. What is the unit of pressure? (Pascal — Pa)
18. What does a voltmeter measure? (Voltage / electrical potential difference)
19. What is the law of conservation of energy? (Energy cannot be created or destroyed, only converted)
20. What is wavelength? (Distance between two successive crests or troughs of a wave)
21. What is nuclear fission? (Splitting of a heavy atomic nucleus into smaller nuclei, releasing energy)
22. What is the name of the force that opposes motion? (Friction)
23. What type of electromagnetic radiation has the highest frequency? (Gamma rays)
24. What is Ohm's Law? (V = IR — Voltage equals Current times Resistance)
25. What is the boiling point of water in Kelvin? (373.15 K)

Space & Astronomy Trivia — 25 Questions

1. How many planets are in our solar system? (8 — since Pluto's reclassification in 2006)
2. What is the largest planet? (Jupiter)
3. What is a light-year? (Distance light travels in one year — ~9.46 trillion km)
4. What galaxy do we live in? (Milky Way)
5. What is the red spot on Jupiter? (A massive storm larger than Earth, ongoing for 350+ years)
6. What is a nebula? (A cloud of gas and dust in space — birthplace of stars)
7. How long does light from the Sun take to reach Earth? (About 8 minutes)
8. What is the name of the first artificial satellite? (Sputnik 1 — launched by the USSR in 1957)
9. What is a pulsar? (A rapidly rotating neutron star emitting regular radio waves)
10. What is the Hubble Space Telescope named after? (Edwin Hubble — who proved other galaxies exist)
11. How many moons does Mars have? (2 — Phobos and Deimos)
12. What is the coldest planet? (Neptune — despite being farther, Uranus holds colder records)
13. What was the first crewed mission to land on the Moon? (Apollo 11, July 1969)
14. What type of star is the Sun? (Yellow dwarf / G-type main-sequence star)
15. How old is the universe? (Approximately 13.8 billion years)