251 Science Trivia For Kids With Answers – Easy & Hard

Science Quizzes for Kids is a great way to develop their intelligence and get them interested in Science, Technology, Engineering and Math (STEM). This is a fun way to subtly convey interesting facts to children and organize an exciting educational game.

A short science quiz session for students is the perfect way to break up the monotony of the lesson, engage students and engage them in healthy competition.

Content:

• Simple Science Quizzes for Kids Simple General Science Quizzes Simple Biology Quizzes Simple Physics Quizzes
• Difficult science quizzes for high school students Chemistry quizzes Physics quizzes Computer science quizzes Biology quizzes

Simple science quizzes with answers for kids

Easy science quizzes are perfect for preschoolers, kindergarteners, and elementary school students. Many of these questions are simple, while some are presented in a fancy way to help children develop cognitive skills.

These simple kindergarten science questions test kids’ knowledge of relatively simple science facts and help them make connections between what they’ve learned.

General questions and answers in natural sciences

1. What part of the Earth is covered by water? Answer: 71%

2. How many colors are there in the rainbow? Answer: Seven

Quick Tip: Also check out some fun facts about the rainbow.

3. What is the long winter sleep of animals called? Answer: Hibernation

4. What gas is necessary for breathing? Answer: Oxygen

5. How many phases of the moon are there? Answer: Eight

Additional information: Explore the phases of the moon with Oreo cookies to make learning fun and hands-on.

6. Which star is closest to Earth? Answer: The sun

7. Which two NASA astronauts went into space on an 8-day mission but were stuck there for 286 days? Answer: Sunita Williams and Butch Wilmore

8. What are the small rocky objects that revolve around the Sun called? Answer: Asteroids

9. What causes day and night? Answer: The rotation of the Earth around its axis.

10. What season precedes winter? Answer: Autumn

Quick tip: add some wintery questions like “What would you choose?” for recharging children.

11. What form is the most common in nature? Answer: Hexagon

12. What are identical twins called? Answer: Identical twins

13. What is everything made of? Answer: From matter

14. How many states of matter exist? Answer: Four – solid, liquid, gas and plasma

15. What device is used to measure temperature? Answer: Thermometer

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

17. What is the name of the vehicle used for space travel? Answer: Spaceship.

Related: Dive into fun facts about space for kids to learn weird but true facts about space.

18. What are artificial objects that revolve around the planet called? Artificial satellites

19. How many planets are there in the solar system? Answer: Eight

20. What is the main source of energy on our planet? Answer: The sun

21. How many phases of the moon are there? Answer: Eight

Easy interesting biology facts for children

22. What are the animals that feed exclusively on meat called? Answer: Carnivores

23. Which animal is the largest mammal on Earth? Answer: Blue whale

24. Can you burp in space? Answer: No.

In space, it is impossible to burp the way it is done on Earth. Due to the lack of gravity, food, liquid and gases mix, resulting in wet burps or even vomiting.

25. Which baby does not look like its parents? Answer: caterpillar

26. What are animals that feed on dead and decaying matter called? Answer: Scavengers

27. How many bones are there in the human body? Answer: 206

28. What is the name of the process by which plants produce food? Answer: Photosynthesis

29. How many baby teeth does a person have? Answer: 20

30. What is the name of the fin located on the back of the fish? Answer: Backstroker

31. What are the plants that eat meat called? Answer: Insectivorous plants

32. What are the preserved remains of plants and animals called? Answer: fossils

33. What is the only mammal that can fly? Answer: Bat

34. Which mammals lay eggs? Answer: platypus and echidna

35. What are animals that live at the expense of other animals called? Answer: Parasites

36. Which flower is the largest in the world? Answer: Rafflesia Arnoldi

37. Which fruit is the smelliest in the world? Answer: Durian

38. What pigment gives color to human skin, hair and nails? Answer: Melanin

39. What is the name of the tiny holes in the skin from which hair grows? Answer: Follicles

40. What by-products are formed as a result of photosynthesis? Answer: Water vapor, oxygen and sugar

41. Which part of the plant is called the “kitchen of the plant”? Answer: Leaves

Quick Tip: Make learning memorable with Fun Botany Experiments for Kids.

42. What pigment is necessary for photosynthesis? Answer: Chlorophyll

43. Which bone is the strongest in the human body? Answer: Femur – also called femur.

44. Which bird is the smallest? Answer: Hummingbird-bee

Quick Tip: Check out the “Heavyweights of the Animal World.”

45. Who is the largest terrestrial predator? Answer: Polar bear

46. ​​What fruit is the largest in the world? Answer: Jackfruit

47. What is the largest reptile on earth? Answer: Sea crocodile

48. Which grass is the tallest? Answer: bamboo

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

50. What is the name of the protective mechanism by which animals hide or blend in with the environment? Answer: Camouflage

51. Which organ is the largest in the human body? Answer: Skin

52. How many stages does the life cycle of a butterfly have? Answer: Four – egg, larva, pupa and adult.

53. Which fish is the largest in the world? Answer: Whale shark

54. Which animal lays the largest egg in the world? Answer: Ostrich

55. Which bird has the largest wingspan? The answer: a wandering albatross with a wingspan of nearly 12 feet!

Easy physics quizzes for kids with answers

56. Which air is lighter – hot or cold? Answer: Hot air

57. What type of substance does not have a specific shape, but has a specific volume? Answer: Liquids

58. What factors trigger the water cycle? Answer: evaporation and gravity

59. What is the name of the smallest unit of matter? Answer: Atom.

60. Who formulated the laws of motion? Answer: Sir Isaac Newton

61. What is the name of the invisible force that attracts objects to each other? Answer: gravity

62. What is the name of the force that slows down the movement of objects? Answer: Friction

63. What unit of measurement is used to measure weight? Answer: kilograms or pounds

More information: Learn more about the science of measurement with our simple guide.

64. Why does a ball thrown into the air fall? Answer: Because of gravity!

65. What is the name of the process during which liquid water turns into water vapor? Answer: Evaporation

66. What is the unit of measurement of distance? Answer: Meter

67. What is the unit of measurement of time? Answer: Seconds

68. What are specialists who study fossils called? Answer: Paleontologists

Science questions and answers for children

Immerse yourself in the world of exciting science questions to develop your children’s scientific acumen and create the basis for interesting conversations. These science questions are great for both classroom activities and family game nights.

These science quizzes for high school students cover a wide range of science topics, from materials science, physics, biology to earth science, as well as random science facts.

Chemistry questions for children

69. How many elements are in the periodic table? Answer: 118

70. What gas is the most common in the Earth’s atmosphere? Answer: Nitrogen is almost 78%.

71. Which metal is the only one that exists in a liquid state at normal temperature? Answer: mercury

Quick tip: Add some science jokes to make your quiz more fun.

72. At what temperature does mercury freeze? Answer: -38.83 degrees Celsius

73. What are chemical reactions that release heat called? Answer: Exothermic reactions

74. Which element catches fire when it comes into contact with air? Answer: Phosphorus

75. What is necessary for combustion? Answer: Oxygen

76. What is the name of the process during which a solid substance turns directly into a gas? Answer: Sublimation

77. How many inert gases are there? Answer: Seven – helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn) and oganesson (Og)

78. What chemical reaction provides the Sun with energy? Answer: Nuclear fusion

79. What is the chemical name of table salt? Answer: sodium chloride – NaCl

80. What is the chemical formula of water? Answer: H2O

81. At what temperature is Celsius equal to Fahrenheit? Answer: -40 degrees Celsius

82. At what temperature are Celsius and Kelvin equal to each other? Answer: -273.1 degrees Celsius

83. What is the name of the process during which a gas turns directly into a solid substance? Answer: Deposition

84. Which two elements are liquid at room temperature? Answer: Mercury and bromine

85. Name the purest form of carbon. Answer: Diamond

86. What are the four main precious metals? Answers: Gold, silver, platinum and palladium

87. Which element has the most allotropes? Answer: Carbon

88. Who is considered the “father” of organic chemistry? Answer: Friedrich Weller

89. What gas smells like rotten eggs? Answer: hydrogen sulfide is H2S

90. What is chlorine named after? Answer: “Chloros” is a Greek word meaning greenish yellow.

91. Which mineral is the most common in the human body? Answer: calcium

92. What is the name of the metal property that allows it to be drawn into a wire? Answer: plasticity

93. Which metal is the best conductor of electricity? Answer: Silver

94. What is the scientific symbol for gold? Answer: Au

95. What is the scientific name of gold? Answer: Aurum

96. What is the chemical name of iron? Answer: Ferrum

97. What property of metal allows it to be forged into sheets? Answer: Malleability

98. What gas is called dry ice? Answer: Frozen carbon dioxide

More info: Learn how to have fun with dry ice by checking out Dry Ice Experiments for Kids.

99. Which acid is the most corrosive? Answer: Fluoroantimonic acid, HSbF6

100. What scale is used to measure the hardness of minerals? Answer: Mohs scale

101. What is the smallest subatomic particle? Answer: Quarks

102. What is the name of the branch of chemistry that studies compounds that contain carbon? Answer: Organic chemistry

103. What metal is the most common on Earth? Answer: Aluminum

104. What is the name of the science that studies materials at very low temperatures? Answer: Cryogenic science

105. What gas is responsible for the fizz in sparkling water? Answer: Carbon dioxide – CO2

106. Which branch of chemistry deals with chemical processes that occur inside living organisms? Answer: Biochemistry

Physical quizzes for children with answers

107. What state of matter is the most common on Earth? Answer: Plasma

108. What is the science of light called? Answer: Optics

109. Which black hole is the largest in the Milky Way galaxy? Answer: Gaia-GH3 with a mass 33 times the mass of the Sun.

110. What is the property of the liquid surface that allows it to resist an external force and act as an elastic membrane called? Answer: surface tension

More info: Check out Surface Tension Experiments to learn about it in action!

111. What is the speed of light? Answer: 300,000 km/s

112. What is the unit of measurement of force? Answer: Newton

113. What force acts between two bodies in contact with each other? Answer: The force of friction

114. What force is responsible for the rotation of the planets around the Sun? Answer: Gravity

115. What is a constant flow of electrons in one direction called? Answer: Electric current

116. What is the unit of measurement of electric charge? Answer: A pendant marked with the letter C

117. What is the name of the force acting upwards on bodies immersed in a liquid? Answer: buoyancy

118. Who discovered buoyancy? Answer: Archimedes

119. Who formulated the theory of relativity? Answer: Albert Einstein

120. What is the unit of measurement of electric power? Answer: Watt

121. True or false – sound needs a medium to propagate? Answer: True

Related: Fun True or False Questions for Kids

122. What is the third law of motion? Answer: Every action has an equal and opposite reaction

123. What color has the longest wavelength in the visible spectrum? Answer: Red color

124. What scientific word means “push” or “pull”? Answer: Strength

125. Which color has the maximum frequency? Answer: Purple

126. What phenomenon causes refraction of light during its passage through water? Answer: Refraction

127. What is the name of the science that studies the movement of air? Answer: Aerodynamics

128. What is the name of the unit of measurement of illumination? Answer: Suite

129. What unit of measurement is used to measure the distance between stars? Answer: A light year

130. What branch of physics deals with subatomic matter? Answer: Quantum physics

131. What branch of physics deals with space? Answer: Astrophysics

132. Which branch of physics deals with heat and thermal energy? Answer: Thermodynamics

133. What is the name of the unit of measurement of current strength? Answer: Ampere

134. What law explains the three basic laws of mechanics? Answer: Newton’s laws of motion

135. What is the process of splitting an atom called? Answer: Nuclear decay

136. What type of electromagnetic radiation has the highest energy? Answer: gamma rays

137. What type of energy accumulates in an object due to its shape or position? Answer: Potential energy

138. What type of energy accumulates in a moving object? Answer: Kinetic energy

139. What is the name of the distance between two peaks or two troughs of a wave? Answer: Wavelength

140. What is the speed of sound in air? Answer: 343 m/s

141. In which medium does sound travel the fastest? Answer: In solids

142. What is the property of a substance that resists changes in motion called? Answer: Inertia

143. What is the significance of the acceleration of free fall? Answer: 9.8 m/s2

144. True or false: centripetal forces act towards the center of the circle. Answer: True

145. What is the name of the process during which an atom or molecule acquires a negative or positive charge? Answer: Ionization

146. What is the name of the device used to measure electric current? Answer: Ammeter

147. What waves do not need a medium to propagate? Answer: Electromagnetic waves

148. What is the rate of change of speed called? Answer: Acceleration

149. What type of energy is stored in a capacitor? Answer: Electrostatic potential energy

150. Who is the only person to have won Nobel Prizes in both physics and chemistry? Answer: Madame Curie

151. What is the antimatter equivalent of an electron? Answer: Positron

152. What is the opposite of matter? Answer: Antimatter

153. What unit of measurement is used to measure light intensity? Answer: Candela

154. What four fundamental forces exist in the universe? Answer: Gravitational force, electromagnetic force, weak nuclear force and strong nuclear force

155. Which of the fundamental forces is the strongest in the universe? Answer: Strong nuclear force

156. What is the science that studies movement called? Answer: Mechanics

157. What is the name of the wire inside the light bulb? Answer: Incandescent filament

158. True or false: Force can be exerted without contact. Answer: True! Remember the magnetic force

159. What is the name of the phenomenon due to which metals expand during heating? Answer: Thermal expansion

160. What form of energy can we see with the naked eye? Answer: Light energy

161. Who formulated the laws of motion? Answer: Sir Isaac Newton

Difficult computer science questions for children with answers

162. Who wrote the first computer algorithm? Answer: Ada Lovelace

Related: Read about female pioneers who broke the glass ceiling in STEM.

163. What is the name of the software that helps computer users access the Internet? Answer: Web browser

164. What number system do computers use? Answer: Binary number system

165. What was the name of the first computer? Answer: ENIAC – Electronic Numerical Integrator and Computer

166. Who invented the World Wide Web? Answer: Tim Berners-Lee

167. What does the abbreviation HTML mean? Answer: Hypertext markup language

168. What does the abbreviation HTTP mean? Answer: Hypertext transfer protocol

169. What does the abbreviation SQL mean? Answer: Structured Query Language

170. Where does the computer store its data forever? Answer: hard drive

171. Where does the computer temporarily store its data? Answer: RAM

172. What does the abbreviation RAM mean? Answer: RAM

173. What is the name of the memory used to store frequently accessed data and instructions to speed up processing? Answer: Cache memory

174. What does the abbreviation GUI mean? Answer: Graphical user interface

175. Which technology company has set itself the goal of putting a personal computer on every desk? Answer: Microsoft

176. Who are the founders of Microsoft? Answer: Bill Gates and Paul Allen

177. What does the abbreviation CD-ROM mean? Answer: A CD is read-only memory.

178. What does “URL” mean? Answer: Unified resource locator

179. What does “ASCII” mean? Answer: American Standard Code for Information Interchange

180. What is the name of Google’s parent company? Answer: Alphabet

181. Who is the founder of Google? Answer: Larry Page and Sergey Brin

183. Who founded Hotmail? Answer: Sabir Bhatia and Jack Smith

184. What does the abbreviation “AI” mean? Answer: Artificial intelligence

185. What is the name of the process of converting information into a secret code to hide its true meaning? Answer: Encryption

186. What is the name of the device used to access the Internet? Answer: Modem, which means “modulator-demodulator”

187. What is the name of a network security system that monitors and filters incoming and outgoing network traffic? Answer: Firewall

188. The science of encryption and decryption of information is called? Answer: Cryptography

189. What is the name of a small piece of data stored by a web browser on the user’s computer when browsing web pages? Answer: Cookies

190. Who is considered the father of artificial intelligence? Answer: John McCarthy

191. What artificial intelligence tool is considered the most advanced state in 2023? Answer: GPT3

192. What does the abbreviation “API” mean in informatics? Answer: Application programming interface

193. Which programming language is named after a species of snake? Answer: Python!

194. What does the abbreviation FTP mean? Answer: File Transfer Protocol

195. What is the name of the branch of computer science that uses the principles of quantum physics for calculations? Answer: Quantum computing

196. What is the name of software specially designed to harm a computer, server or network? Answer: Malware

197. What are programs whose source code is freely available for anyone to edit or add functions called? Answer: Open source programs

198. Software that monitors and removes malicious programs from computers on which it is installed is called? Antivirus.

199. The branch of computer science that tries to imitate human intelligence and thought processes through repetition is called? Answer: Machine learning

200. Digital currency is also known as? Answer: Cryptocurrency

201. What technology uses artificial intelligence, virtual reality, and augmented reality to create an immersive 3D experience? Answer: Metaverse technology.

202. Who first proposed the idea of ​​creating a computer? Answer: Charles Gabbage

Biology questions for children with answers

203. What is the name of the process during which an organism undergoes a striking change in shape or structure after birth? Answer: Metamorphosis.

204. What is the name of the smallest bone in the human body? Answer: A stirrup, only 2-3 mm in size

205. What infections are antibiotics used to treat? Answer: bacterial

206. What part of the human brain is responsible for hearing and speech? Answer: Temporal lobe

207. What is the name of a molecule that carries genetic information for the development and functioning of an organism? Answer: DNA (deoxyribonucleic acid).

208. What is the name of the process during which a plant loses water through its leaves? Answer: Transpiration

209. What pigment in vertebrates is responsible for transporting oxygen to organs? Answer: Hemoglobin

210. Which part of the human brain is the largest? Answer: Big brain

211. What scientific term denotes peeling of the skin? Answer: Desquamation

212. Which animal is the closest living relative of man? Answer: chimpanzees and bonobos

213. What is the name of the ability of the human brain to self-reorganize? Answer: Neuroplasticity

214. Name three components that are present in plant cells, but absent in animal cells? Answer: Vacuole, chloroplast and cell wall.

215. In which part of the cell is DNA? Answer: In the cell nucleus

216. What is the name of the branch of science that deals with the study of cell biology? Answer: cytology

217. What are the animals that are active at dawn and dusk called? Answer: twilight

218. Hair and nails are made of which protein? Answer: Keratin

219. What part of the brain controls hunger? Answer: Hypothalamus

220. What is the name of the branch of medical science that studies bacteria? Answer: Bacteriology

221. What prevents food from entering the trachea? Answer: Epiglottis

222. What do white blood cells produce to help fight infection? Answer: Antibodies

223. What is the average life cycle of an erythrocyte? Answer: 120 days

224. What tissue connects bones with muscles? Answer: Tendon

225. What part of the human body is called an armpit? Answer: Groin

226. Which organ is the smallest in the human body? Answer: Pineal gland

227. What are the chemical substances that are released into the blood and act as mediators called? Answer: Hormones

228. Which nerve is the largest in the human body? Answer: sciatic nerve

229. What is the other name for the principle of “survival of the fittest”? Answer: Natural selection

230. Which sense organ is most closely related to memory? Answer: smell

231. What is the name of the science that studies human remains? Answer: Archaeology

Related: Immerse yourself in forensics with Crime Scene Investigation for Kids.

232. What is the scientific classification of living beings called? Answer: Taxonomy

233. An animal or plant that lives in or on another animal or plant is called? Answer: Parasite

234. What is the name of the lizard’s ability to voluntarily tear off its tail and grow it back? Answer: Caudal autotomy

235. Which blood group is the rarest? Answer: AB-

236. Which blood group is also known as the “universal blood donor”? Answer: O is negative

237. After whom is the process of pasteurization named? Answer: Louis Pasteur

238. What part of the body produces blood? Answer: Bone marrow

239. Name the fattest human organ? Answer: Brain

240. Which body system regulates the level of fluid in the body? Answer: Lymphatic system

241. How many types of teeth does an adult have? Answer: Four – incisors, canines, premolars and molars

242. What is the science that studies marine life called? Answer: Marine biology

243. What is the name of the process by which bacteria produce food using chemical energy? Answer: Chemosynthesis

244. What glands produce tears? Answer: lacrimal glands

245. Where are the majority of sweat glands located in the human body? Answer: on the soles of the feet

246. How many vertebrae are in the human neck? Answer: Seven

247. What is a change in the DNA sequence of an organism called? Answer: Mutation

248. The branch of biology that studies fungi is called? Answer: Mycology

249. What are the animals that can live both on land and in water called? Answer: Amphibians

250. What is petrified tree resin called? Answer: Amber

251. What are the male parts of a plant or flower called? Answer: Stamens

252. What is called the “energy station of the cell”? Answer: Mitochondria

Frequently asked questions

Source: 251 Science Trivia For Kids With Answers