150+ Science Trivia Questions with Answers

150+ science trivia questions across every branch — from the human body to deep space. Answers are in bold after each question.

Biology Trivia Questions

1. What is the basic unit of life? (The cell)
2. How many chambers does the human heart have? (Four)
3. What is the process by which plants make food? (Photosynthesis)
4. How many pairs of chromosomes do humans have? (23 pairs)
5. What organ filters blood and produces urine? (The kidneys)
6. What type of blood cell carries oxygen? (Red blood cells)
7. What is the largest organ in the human body? (The skin)
8. What part of the cell contains the genetic material? (The nucleus)
9. What is the longest bone in the human body? (The femur)
10. What is the name of the pigment that gives skin its color? (Melanin)
11. Which blood type is the universal donor? (O negative)
12. What is the smallest bone in the human body? (The stapes in the ear)
13. What carries oxygen from the lungs to the body? (Hemoglobin)
14. How many muscles are in the human body? (About 600)
15. What does DNA stand for? (Deoxyribonucleic acid)
16. What are the three types of muscle tissue? (Skeletal, smooth, and cardiac)
17. What organ produces bile? (The liver)
18. What is the average human body temperature in Fahrenheit? (98.6°F)
19. What is the study of heredity and genes called? (Genetics)
20. What is the term for organisms that make their own food? (Autotrophs)
21. What is the protective sheath around neurons called? (Myelin sheath)
22. How many taste buds does the average human have? (About 10,000)
23. What type of joint is a human shoulder? (Ball-and-socket joint)
24. What is the name of the structure discovered by Watson and Crick? (The DNA double helix)
25. What is the scientific name for the throat? (Pharynx)

Chemistry Trivia Questions

1. What is the chemical formula for water? (H2O)
2. What element has the atomic number 6? (Carbon)
3. What is the pH of a neutral substance? (7)
4. What is the chemical symbol for iron? (Fe)
5. What state of matter has definite volume but no definite shape? (Liquid)
6. What is the table that organizes all chemical elements called? (The Periodic Table)
7. What gas is produced when baking soda and vinegar react? (Carbon dioxide)
8. How many elements are on the periodic table? (118)
9. What is the chemical formula for table salt? (NaCl)
10. What is the process of a solid turning directly into a gas? (Sublimation)
11. What is the most abundant element in the universe? (Hydrogen)
12. What is dry ice made of? (Solid carbon dioxide)
13. What is the atomic number of gold? (79)
14. What type of bond involves the sharing of electrons? (Covalent bond)
15. What is absolute zero in Celsius? (-273.15°C)
16. What noble gas is used in balloons? (Helium)
17. What are atoms with the same atomic number but different mass numbers called? (Isotopes)
18. What element is a diamond made of? (Carbon)
19. What is the chemical symbol for lead? (Pb)
20. What is the most common element in Earth's crust? (Oxygen)
21. What is the chemical formula for glucose? (C6H12O6)
22. What is a substance that speeds up a chemical reaction called? (A catalyst)
23. What is the chemical symbol for silver? (Ag)
24. What is the lightest element on the periodic table? (Hydrogen)
25. What is the chemical formula for ammonia? (NH3)

Physics Trivia Questions

1. What is the unit of electrical resistance? (Ohm)
2. What is the speed of sound in air at sea level? (About 767 mph / 343 m/s)
3. What law states every action has an equal and opposite reaction? (Newton's Third Law)
4. What does E = mc² represent? (Energy equals mass times the speed of light squared)
5. What is the force that resists motion between two surfaces? (Friction)
6. What is the subatomic particle with a negative charge? (Electron)
7. What is the unit of power? (Watt)
8. What phenomenon causes a straw to appear bent in water? (Refraction)
9. What is the acceleration due to gravity on Earth? (9.8 m/s²)
10. What particle has no charge and is found in the nucleus? (Neutron)
11. What is the term for the tendency of objects to resist changes in motion? (Inertia)
12. What color of visible light has the highest frequency? (Violet)
13. What is the name of the quantum of light? (Photon)
14. What is the unit of energy? (Joule)
15. What is the term for energy stored in position? (Potential energy)
16. What is the unit of electric current? (Ampere)
17. What is Ohm's Law? (V = IR — Voltage equals Current times Resistance)
18. What type of mirror curves inward? (Concave mirror)
19. What is terminal velocity? (The speed at which air resistance equals gravity, stopping acceleration)
20. What device converts electrical energy to mechanical energy? (Electric motor)
21. What is wavelength? (Distance between two consecutive peaks of a wave)
22. What is the Doppler effect? (Change in frequency of a wave relative to an observer's motion)
23. What is the unit of frequency? (Hertz)
24. What type of wave requires a medium to travel through? (Mechanical wave)
25. What is the study of heat and temperature called? (Thermodynamics)

Earth Science Trivia Questions

1. What is the innermost layer of the Earth called? (The inner core)
2. What causes earthquakes? (Movement of tectonic plates)
3. What type of rock is formed from cooled lava? (Igneous rock)
4. What is the study of earthquakes called? (Seismology)
5. How old is the Earth? (About 4.5 billion years)
6. What is the name of the supercontinent that existed 300 million years ago? (Pangaea)
7. What causes the seasons on Earth? (The tilt of Earth's axis)
8. What is the Richter scale used to measure? (Earthquake magnitude)
9. What percentage of Earth's surface is covered by water? (About 71%)
10. What is molten rock beneath the Earth's surface called? (Magma)
11. What are the three types of rocks? (Igneous, sedimentary, and metamorphic)
12. What instrument measures atmospheric pressure? (Barometer)
13. What is the process by which wind and water break down rock? (Erosion)
14. Where is the ozone layer located? (In Earth's stratosphere)
15. What is the water cycle? (The continuous movement of water through evaporation, condensation, and precipitation)

Space & Astronomy Trivia Questions

1. How many planets are in our solar system? (Eight)
2. What is the closest star to Earth besides the Sun? (Proxima Centauri)
3. What is a light-year? (Distance light travels in one year — about 5.88 trillion miles)
4. What planet has the most moons? (Saturn)
5. What is the name of our galaxy? (The Milky Way)
6. What is a black hole? (A region of space where gravity is so strong nothing can escape)
7. What is the largest planet in our solar system? (Jupiter)
8. What was the first artificial satellite? (Sputnik 1)
9. What causes the phases of the Moon? (The Moon's position relative to Earth and the Sun)
10. What is a nebula? (A cloud of gas and dust in space where stars form)
11. How long does it take Earth to orbit the Sun? (365.25 days)
12. What planet is known for its rings? (Saturn)
13. What is the term for when the Moon passes between Earth and the Sun? (Solar eclipse)
14. What is the surface temperature of the Sun? (About 5,500°C)
15. What is the International Space Station? (A modular space station in low Earth orbit used for research)
16. What year did humans first land on the Moon? (1969)
17. What planet is closest to the Sun? (Mercury)
18. What is the asteroid belt? (A region between Mars and Jupiter containing most of the solar system's asteroids)
19. What is a comet? (A small icy body that releases gas and dust when near the Sun)
20. What is the Big Bang Theory? (The prevailing cosmological model explaining the origin of the universe)

Browse science bingo cards to play along with these questions.