300+ Science Trivia Questions and Answers: Test Your Knowledge!

Looking for the best science trivia questions and answers? You’ve found the ultimate collection! From biology to physics, these science trivia questions will challenge students, adults, and trivia enthusiasts alike.

Quick Science Trivia Questions and Answers

Easy Science Trivia Questions (1-25)

1. What is the chemical symbol for water? Answer: H2O

2. What planet is known as the “Red Planet”? Answer: Mars

3. How many bones are in an adult human body? Answer: 206

4. What gas do plants absorb from the atmosphere during photosynthesis? Answer: Carbon dioxide

5. What is the fastest land animal? Answer: Cheetah

6. What is the largest planet in our solar system? Answer: Jupiter

7. What organ pumps blood through the human body? Answer: Heart

8. What gas do we breathe in to survive? Answer: Oxygen

9. How many legs does a spider have? Answer: Eight

10. What is the hardest natural substance on Earth? Answer: Diamond

11. What is the closest star to Earth? Answer: The Sun

12. What do you call a baby frog? Answer: Tadpole

13. What is the largest mammal in the world? Answer: Blue whale

14. How many sides does a triangle have? Answer: Three

15. What force keeps us on the ground? Answer: Gravity

16. What is the main gas in the air we breathe? Answer: Nitrogen (78%)

17. What do bees make? Answer: Honey

18. What is the center of an atom called? Answer: Nucleus

19. What do you call animals that eat only plants? Answer: Herbivores

20. What is the smallest unit of life? Answer: Cell

21. What is frozen water called? Answer: Ice

22. How many chambers does a human heart have? Answer: Four

23. What gas do plants release during photosynthesis? Answer: Oxygen

24. What is the Earth’s natural satellite? Answer: The Moon

25. What do you call a scientist who studies rocks? Answer: Geologist

Medium Science Trivia Questions (26-75)

26. What is the largest organ in the human body? Answer: The skin

27. What is the speed of light in a vacuum? Answer: Approximately 299,792,458 meters per second

28. Who developed the theory of evolution by natural selection? Answer: Charles Darwin

29. What is the pH of pure water? Answer: 7 (neutral)

30. What element has the chemical symbol “Au”? Answer: Gold

31. Which part of the brain controls balance and coordination? Answer: The cerebellum

32. What is the most abundant gas in Earth’s atmosphere? Answer: Nitrogen

33. What is the study of heredity called? Answer: Genetics

34. What type of bond holds water molecules together? Answer: Hydrogen bonds

35. What is the smallest bone in the human body? Answer: The stapes (in the ear)

36. What causes the seasons on Earth? Answer: The tilt of Earth’s axis

37. What is the chemical formula for table salt? Answer: NaCl (sodium chloride)

38. What is the powerhouse of the cell? Answer: Mitochondria

39. What scale measures earthquake intensity? Answer: Richter scale

40. What is the study of insects called? Answer: Entomology

41. What type of rock is formed by cooling magma? Answer: Igneous rock

42. What is the chemical symbol for iron? Answer: Fe

43. What organ produces insulin? Answer: Pancreas

44. What is the smallest particle of an element? Answer: Atom

45. What causes tides in Earth’s oceans? Answer: Gravitational pull of the Moon and Sun

46. What is the study of weather called? Answer: Meteorology

47. What type of blood vessel carries blood away from the heart? Answer: Arteries

48. What is the chemical formula for carbon dioxide? Answer: CO2

49. What is the longest bone in the human body? Answer: Femur (thigh bone)

50. What galaxy is Earth located in? Answer: Milky Way

51. What is the study of fungi called? Answer: Mycology

52. What gas makes up about 21% of Earth’s atmosphere? Answer: Oxygen

53. What is the liquid part of blood called? Answer: Plasma

54. What is the study of earthquakes called? Answer: Seismology

55. What type of animal is a dolphin? Answer: Mammal

56. What is the chemical symbol for carbon? Answer: C

57. What is the largest artery in the human body? Answer: Aorta

58. What planet is closest to the Sun? Answer: Mercury

59. What is the study of birds called? Answer: Ornithology

60. What type of rock is marble? Answer: Metamorphic rock

61. What is the chemical symbol for helium? Answer: He

62. What is the strongest muscle in the human body? Answer: Jaw muscle (masseter)

63. What planet has the most moons? Answer: Saturn

64. What is the study of plants called? Answer: Botany

65. What type of bond involves sharing electrons? Answer: Covalent bond

66. What is the largest bone in the human body? Answer: Femur

67. What is the study of the ocean called? Answer: Oceanography

68. What gas is produced when metals react with acid? Answer: Hydrogen

69. What is the smallest planet in our solar system? Answer: Mercury

70. What is the study of fossils called? Answer: Paleontology

71. What type of blood cell fights infection? Answer: White blood cells

72. What is the chemical symbol for oxygen? Answer: O

73. What is the study of stars called? Answer: Astronomy

74. What organ filters waste from blood? Answer: Kidneys

75. What is the study of matter and energy called? Answer: Physics

Hard Science Trivia Questions (76-125)

76. What is the Heisenberg Uncertainty Principle? Answer: You cannot simultaneously know both the exact position and momentum of a particle

77. What is the deepest oceanic trench? Answer: The Mariana Trench

78. Who discovered penicillin? Answer: Alexander Fleming

79. What is a supernova? Answer: A powerful stellar explosion that occurs at the end of a massive star’s life

80. What does CRISPR stand for? Answer: Clustered Regularly Interspaced Short Palindromic Repeats

81. What is the half-life of Carbon-14? Answer: Approximately 5,730 years

82. What is the name of the theoretical boundary around a black hole? Answer: Event horizon

83. What is the most reactive element on the periodic table? Answer: Fluorine

84. What is the scientific name for the human species? Answer: Homo sapiens

85. What is the study of the immune system called? Answer: Immunology

86. What is the rarest naturally occurring element? Answer: Astatine

87. What is the name of the process by which stars create heavier elements? Answer: Nuclear fusion

88. What is the smallest unit of genetic information? Answer: Gene

89. What is the study of the structure of organisms called? Answer: Anatomy

90. What is the name of the theory that explains the origin of the universe? Answer: Big Bang Theory

91. What is the chemical formula for ammonia? Answer: NH3

92. What is the study of the nervous system called? Answer: Neurology

93. What is the name of the effect that causes moving clocks to run slower? Answer: Time dilation

94. What is the most electronegative element? Answer: Fluorine

95. What is the study of genes and heredity called? Answer: Genetics

96. What is the name of the particle that carries the electromagnetic force? Answer: Photon

97. What is the chemical formula for methane? Answer: CH4

98. What is the study of the endocrine system called? Answer: Endocrinology

99. What is the name of the boundary between two tectonic plates? Answer: Fault line

100. What is the most stable isotope of uranium? Answer: Uranium-238

101. What is the study of the digestive system called? Answer: Gastroenterology

102. What is the name of the process by which water moves through plants? Answer: Transpiration

103. What is the chemical formula for sulfuric acid? Answer: H2SO4

104. What is the study of the respiratory system called? Answer: Pulmonology

105. What is the name of the force that holds atomic nuclei together? Answer: Strong nuclear force

106. What is the most abundant element in the universe? Answer: Hydrogen

107. What is the study of the circulatory system called? Answer: Cardiology

108. What is the name of the process by which cells divide to form gametes? Answer: Meiosis

109. What is the chemical formula for hydrochloric acid? Answer: HCl

110. What is the study of the urinary system called? Answer: Urology

111. What is the name of the particle that mediates the weak nuclear force? Answer: W and Z bosons

112. What is the densest naturally occurring element? Answer: Osmium

113. What is the study of the muscular system called? Answer: Myology

114. What is the name of the process by which plants respond to light? Answer: Phototropism

115. What is the chemical formula for nitric acid? Answer: HNO3

116. What is the study of the skeletal system called? Answer: Osteology

117. What is the name of the theoretical particle that gives mass to other particles? Answer: Higgs boson

118. What is the lightest noble gas? Answer: Helium

119. What is the study of the skin called? Answer: Dermatology

120. What is the name of the process by which plants respond to gravity? Answer: Gravitropism

121. What is the chemical formula for phosphoric acid? Answer: H3PO4

122. What is the study of the eyes called? Answer: Ophthalmology

123. What is the name of the theoretical particle that makes up dark matter? Answer: WIMP (Weakly Interacting Massive Particle)

124. What is the heaviest naturally occurring element? Answer: Uranium

125. What is the study of the ears called? Answer: Otology

Biology Trivia Questions and Answers

Human Body Science Questions

126. How many ribs does a human have? Answer: 24 (12 pairs)

127. What is the largest muscle in the human body? Answer: Gluteus maximus

128. What percentage of the human body is water? Answer: Approximately 60%

129. How many taste buds does the average human have? Answer: About 10,000

130. What is the smallest muscle in the human body? Answer: Stapedius (in the ear)

131. How many teeth does an adult human have? Answer: 32

132. What is the longest nerve in the human body? Answer: Sciatic nerve

133. How many chromosomes do humans have? Answer: 46 (23 pairs)

134. What is the average human body temperature? Answer: 98.6°F (37°C)

135. How many vertebrae are in the human spine? Answer: 33

136. What is the fastest-healing part of the human body? Answer: The tongue

137. How many chambers does a human stomach have? Answer: One

138. What is the largest gland in the human body? Answer: Liver

139. How many muscles are in the human face? Answer: About 43

140. What is the smallest organ in the human body? Answer: Pineal gland

141. How many liters of blood does the human heart pump per day? Answer: About 7,000 liters

142. What is the hardest substance in the human body? Answer: Tooth enamel

143. How many hairs are on the average human head? Answer: About 100,000

144. What is the largest joint in the human body? Answer: Knee

145. How many times does the average human blink per day? Answer: About 17,000 times

Animal Kingdom Science Questions

146. How many hearts does an octopus have? Answer: Three

147. What is the only mammal capable of true flight? Answer: Bats

148. How many stomachs does a cow have? Answer: Four

149. What is the fastest bird in the world? Answer: Peregrine falcon

150. How many legs does a lobster have? Answer: Ten

151. What is the largest lizard in the world? Answer: Komodo dragon

152. How many eyes does a bee have? Answer: Five

153. What is the slowest mammal in the world? Answer: Three-toed sloth

154. How many teeth does a shark have? Answer: Varies, but can have 3,000+ at one time

155. What is the largest bird in the world? Answer: Ostrich

156. How many chambers does a bird’s heart have? Answer: Four

157. What is the most venomous snake in the world? Answer: Inland taipan

158. How many pairs of legs does a centipede have? Answer: 15-177 pairs (varies by species)

159. What is the largest cat in the world? Answer: Siberian tiger

160. How many wings does a butterfly have? Answer: Four

161. What is the fastest fish in the ocean? Answer: Black marlin

162. How many arms does a starfish have? Answer: Usually five

163. What is the largest rodent in the world? Answer: Capybara

164. How many tentacles does a squid have? Answer: Ten

165. What is the smallest mammal in the world? Answer: Bumblebee bat

166. How many species of spiders are there? Answer: Over 48,000

167. What is the largest bear species? Answer: Polar bear

168. How many eggs can a queen bee lay per day? Answer: Up to 2,000

169. What is the most intelligent invertebrate? Answer: Octopus

170. How many species of beetles are there? Answer: Over 400,000

Plant Life Science Questions

171. What is the largest flower in the world? Answer: Rafflesia arnoldii

172. How many species of plants are there on Earth? Answer: Approximately 400,000

173. What is the tallest tree species in the world? Answer: Coast redwood

174. How long can a bristlecone pine tree live? Answer: Over 4,000 years

175. What is the fastest-growing plant in the world? Answer: Bamboo

Chemistry Trivia Questions and Answers

Periodic Table Questions

176. How many elements are currently on the periodic table? Answer: 118

177. What is the most reactive metal? Answer: Francium

178. What element has the atomic number 1? Answer: Hydrogen

179. What is the chemical symbol for tungsten? Answer: W

180. What element is known as quicksilver? Answer: Mercury

181. What is the chemical symbol for potassium? Answer: K

182. What element has the highest melting point? Answer: Tungsten

183. What is the chemical symbol for sodium? Answer: Na

184. What element is essential for making steel? Answer: Iron

185. What is the chemical symbol for silver? Answer: Ag

186. What element is used in pencils? Answer: Carbon (graphite)

187. What is the chemical symbol for lead? Answer: Pb

188. What element is used in light bulbs? Answer: Tungsten

189. What is the chemical symbol for tin? Answer: Sn

190. What element is used in batteries? Answer: Lithium (among others)

191. What is the chemical symbol for copper? Answer: Cu

192. What element is used in fertilizers? Answer: Nitrogen

193. What is the chemical symbol for zinc? Answer: Zn

194. What element is used in computer chips? Answer: Silicon

195. What is the chemical symbol for aluminum? Answer: Al

Chemical Reactions and Compounds

196. What is the chemical formula for glucose? Answer: C6H12O6

197. What type of reaction releases energy? Answer: Exothermic

198. What is the chemical formula for hydrogen peroxide? Answer: H2O2

199. What type of reaction absorbs energy? Answer: Endothermic

200. What is the chemical formula for baking soda? Answer: NaHCO3

201. What is the process of a solid becoming a gas called? Answer: Sublimation

202. What is the chemical formula for vinegar? Answer: CH3COOH

203. What is the process of a liquid becoming a gas called? Answer: Evaporation

204. What is the chemical formula for aspirin? Answer: C9H8O4

205. What is the process of a gas becoming a liquid called? Answer: Condensation

206. What is the chemical formula for caffeine? Answer: C8H10N4O2

207. What is the process of a liquid becoming a solid called? Answer: Freezing

208. What is the chemical formula for quartz? Answer: SiO2

209. What is the term for a reaction that goes both ways? Answer: Reversible reaction

210. What is the chemical formula for limestone? Answer: CaCO3

211. What is a substance that speeds up a reaction called? Answer: Catalyst

212. What is the chemical formula for rust? Answer: Fe2O3

213. What is the term for the amount of substance in a solution? Answer: Concentration

214. What is the chemical formula for dry ice? Answer: CO2

215. What is the term for a solution that cannot dissolve more solute? Answer: Saturated

216. What is the chemical formula for chalk? Answer: CaCO3

217. What is the term for the energy needed to start a reaction? Answer: Activation energy

218. What is the chemical formula for milk of magnesia? Answer: Mg(OH)2

219. What is the term for a mixture that looks uniform? Answer: Homogeneous

220. What is the chemical formula for Epsom salt? Answer: MgSO4·7H2O

221. What is the term for a mixture that looks non-uniform? Answer: Heterogeneous

222. What is the chemical formula for bleach? Answer: NaClO

223. What is the term for the number of protons in an atom? Answer: Atomic number

224. What is the chemical formula for antacid tablets? Answer: CaCO3 (calcium carbonate)

225. What is the term for atoms with the same number of protons but different neutrons? Answer: Isotopes

Physics Trivia Questions and Answers

Forces and Motion

226. What is Newton’s second law of motion? Answer: F = ma (Force equals mass times acceleration)

227. What is Newton’s third law of motion? Answer: For every action, there is an equal and opposite reaction

228. What is the unit of power in the SI system? Answer: Watt (W)

229. What is the unit of energy in the SI system? Answer: Joule (J)

230. What is the acceleration due to gravity on Earth? Answer: 9.8 m/s²

231. What is the unit of pressure in the SI system? Answer: Pascal (Pa)

232. What is the formula for kinetic energy? Answer: KE = ½mv²

233. What is the unit of frequency in the SI system? Answer: Hertz (Hz)

234. What is the formula for potential energy? Answer: PE = mgh

235. What is the unit of electric current in the SI system? Answer: Ampere (A)

236. What is the speed of sound in air at room temperature? Answer: About 343 m/s

237. What is the unit of electric charge in the SI system? Answer: Coulomb (C)

238. What is the formula for work? Answer: W = Fd

239. What is the unit of voltage in the SI system? Answer: Volt (V)

240. What is the formula for momentum? Answer: p = mv

241. What is the unit of resistance in the SI system? Answer: Ohm (Ω)

242. What is the formula for acceleration? Answer: a = v/t

243. What is the unit of magnetic field strength? Answer: Tesla (T)

244. What is the formula for velocity? Answer: v = d/t

245. What is the unit of luminous intensity? Answer: Candela (cd)

Space and Astronomy

246. How long does it take for light from the Sun to reach Earth? Answer: About 8 minutes and 20 seconds

247. What is the largest moon of Jupiter? Answer: Ganymede

248. How many Earth days is one year on Mars? Answer: About 687 Earth days

249. What is the largest moon of Saturn? Answer: Titan

250. How many moons does Earth have? Answer: One

251. What is the hottest planet in our solar system? Answer: Venus

252. How many moons does Mars have? Answer: Two (Phobos and Deimos)

253. What is the coldest planet in our solar system? Answer: Neptune

254. How many AU is Earth from the Sun? Answer: 1 AU (Astronomical Unit)

255. What is the largest asteroid in our solar system? Answer: Ceres

256. How long is one day on Venus? Answer: 243 Earth days

257. What is the name of the largest volcano in our solar system? Answer: Olympus Mons (on Mars)

258. How many rings does Saturn have? Answer: Thousands (in multiple ring systems)

259. What is the name of the closest galaxy to the Milky Way? Answer: Andromeda Galaxy

260. How old is the universe approximately? Answer: 13.8 billion years

261. What is the name of the largest known star? Answer: UY Scuti

262. How many light-years across is the Milky Way? Answer: About 100,000 light-years

263. What is the name of the first artificial satellite? Answer: Sputnik 1

264. How many people have walked on the Moon? Answer: 12

265. What is the name of the spacecraft that first landed on Mars? Answer: Viking 1

266. How fast does Earth orbit the Sun? Answer: About 67,000 mph (107,000 km/h)

267. What is the name of the boundary of our solar system? Answer: Heliopause

268. How long does it take for the Moon to orbit Earth? Answer: About 27.3 days

269. What is the name of the largest canyon on Mars? Answer: Valles Marineris

270. How many times bigger is the Sun than Earth? Answer: About 109 times in diameter

271. What is the name of the spacecraft that visited Pluto? Answer: New Horizons

272. How many constellations are officially recognized? Answer: 88

273. What is the name of the telescope that replaced Hubble? Answer: James Webb Space Telescope

274. How many planets are in our solar system? Answer: Eight

275. What is the name of the dwarf planet beyond Neptune? Answer: Pluto

Earth Science Trivia Questions and Answers

Geology and Earth Structure

276. What are the four layers of the Earth? Answer: Crust, mantle, outer core, inner core

277. What is the thickest layer of the Earth? Answer: Mantle

278. What is the temperature of Earth’s core? Answer: About 5,000-6,000°C

279. What type of rock is formed by heat and pressure? Answer: Metamorphic rock

280. What is the study of volcanoes called? Answer: Volcanology

281. What is the Ring of Fire? Answer: A region around the Pacific Ocean with high volcanic and seismic activity

282. What is the hardest mineral? Answer: Diamond

283. What is the softest mineral? Answer: Talc

284. What is the most common mineral in Earth’s crust? Answer: Feldspar

285. What is the process of rock weathering called? Answer: Erosion

286. What is the largest desert in the world? Answer: Antarctica (cold desert) or Sahara (hot desert)

287. What is the deepest point on Earth’s surface? Answer: Challenger Deep in the Mariana Trench

288. What is the highest mountain on Earth? Answer: Mount Everest

289. What is the longest river in the world? Answer: Nile River

290. What is the largest ocean on Earth? Answer: Pacific Ocean

Weather and Climate

291. What is the study of clouds called? Answer: Nephology

292. What type of cloud produces thunderstorms? Answer: Cumulonimbus

293. What is the most dangerous type of weather? Answer: Lightning/thunderstorms

294. What is the eye of a hurricane? Answer: The calm center of the storm

295. What is the difference between weather and climate? Answer: Weather is short-term; climate is long-term patterns

296. What causes lightning? Answer: Electrical discharge between clouds and ground

297. What is the greenhouse effect? Answer: Trapping of heat by greenhouse gases in the atmosphere

298. What is El Niño? Answer: A climate pattern that affects Pacific Ocean temperatures

299. What is acid rain? Answer: Rain with high acidity due to air pollution

300. What is ozone depletion? Answer: The reduction of ozone in Earth’s stratosphere

How to Use These Science Trivia Questions

For Educational Purposes

These science trivia questions and answers are perfect for:

• Classroom review sessions
• Science quiz games for students
• Homework assignments
• Study group activities

For Entertainment

Host engaging trivia nights using these questions:

• Family game nights
• Office team-building events
• Party entertainment
• Social gatherings

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Benefits of Science Trivia

Educational Value

• Reinforces scientific concepts
• Improves retention of facts
• Encourages curiosity about STEM subjects
• Makes learning interactive and fun

Cognitive Benefits

• Enhances memory recall
• Develops critical thinking
• Improves pattern recognition
• Strengthens neural pathways

Social Benefits

• Promotes teamwork and collaboration
• Creates shared learning experiences
• Builds confidence in scientific knowledge
• Encourages healthy competition

Tips for Hosting Science Trivia Events

Preparation

1. Mix difficulty levels – Include easy, medium, and hard questions
2. Cover various topics – Biology, chemistry, physics, earth science
3. Use visual aids – Include images and diagrams when possible
4. Set clear rules – Establish scoring and time limits

During the Event

1. Keep energy high – Use enthusiastic hosting
2. Provide explanations – Share interesting facts with answers
3. Encourage participation – Make it inclusive for all knowledge levels
4. Use technology – Try online quiz platforms for interactive experiences

Frequently Asked Questions About Science Trivia

What makes good science trivia questions?

Good science trivia questions should be:

• Clear and unambiguous
• Factually accurate
• Appropriate for the audience level
• Cover diverse scientific topics
• Include interesting explanations

How can I make science trivia more engaging?

To make science trivia more engaging:

• Use multimedia elements (images, videos)
• Include current scientific discoveries
• Add interesting backstories to answers
• Use quiz formats with visual elements
• Incorporate team-based competitions

What age groups enjoy science trivia?

Science trivia appeals to all ages:

• Elementary students: Simple facts and basic concepts
• Middle/High school: More complex scientific principles
• Adults: Advanced topics and historical scientific discoveries
• Seniors: Classic scientific knowledge and discoveries

How often should I update my science trivia questions?

Update your science trivia regularly:

• Add new scientific discoveries
• Include current events in science
• Refresh outdated information
• Vary question formats and topics

More Science Trivia Resources

Looking for more science content? Check out these related resources:

• Best trivia questions with answers – General trivia across all topics
• Fifth grader questions – Age-appropriate science questions
• True or false questions – Quick science facts
• Team building trivia – Perfect for workplace events

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