75 Science Trivia Questions for Kids with Answers [2025 Edition]

Looking for a fun challenge with you and your kids? Test your knowledge of science with these fun questions. From astronomy, to biology, and chemistry, let’s see if you know your stuff! Don’t forget to keep track of your score at the end and remember, have fun! 

 

1. How much of the Earth is covered in water?

Answer: 71%

 

2. What gas do animals need to breathe to survive?

Answer: Oxygen

 

3. What is the largest star in our solar system?

Answer: The sun

 

4. What kind of blood cells fight infections?

Answer: White blood cells

 

5. How many states of matter are there?

Answer: Three. (Solid, Liquid, Gas)

 

6. What planet is known as the “Red Planet”?

Answer: Mars

 

7. How many bones are in the human body?

Answer: 206

 

8. What gas do plants absorb from the atmosphere?

Answer: Carbon Dioxide

 

9. What is the largest organ in the human body?

Answer: The skin

 

10. Name the powerhouse of the cell.

Answer: The mitochondria

 

Bonus Science Trivia Video

 

11. Can you name the boiling point of water?

Answer: 100 degrees Celcius

 

12. How many teeth does an adult human have?

Answer: 32

 

13. What is the hottest planet in our solar system?

Answer: Venus

 

14. How many bones do sharks have?

Answer: Zero

 

15. Animals that eat both plants and meat are called what?

Answer: Omnivore

 

16. What is the rarest blood type?

Answer: AB

 

17. How many muscles does a cat have in each ear?

Answer: 32

 

18. What does a Geiger Counter measure?

Answer:: Radiation

 

19. What is the center of an atom called?

Answer: Nucleus

 

20. What is the main gas that makes up Earth’s atmosphere?

Answer: Nitrogen

 

21. What is the process in which water changes from a liquid to a gas?

Answer: Evaporation

 

22. What is the most common element in the universe?

Answer: Hydrogen

 

23. What do you call a scientist who studies rocks?

Answer: Geologist

 

24. What is the term for animals that are active during the night?

Answer: Nocturnal

 

25. What do you call a baby frog?

Answer:Tadpole

 

26. What is the process in which caterpillars turn into butterflies?

Answer: Metamorphosis

 

27. What are the 3 primary colors?

Answer: Red, Blue, Yellow

 

28. Where is hereditary information stored in your cells?

Answer: Your chromosomes

 

29. What process turns a solid into a liquid?

Answer: Melting

 

30. What is the formula for water?

Answer: H20

 

31. What is the chemical symbol for gold?

Answer: Au

 

32. What is the chemical system for iron?

Answer: Fe

 

33. What is the chemical symbol for carbon dioxide?

Answer: CO2

 

34. What is the chemical symbol for helium?

Answer: He

 

35. What is the name of the galaxy that houses our solar system?

Answer: The Milky Way

 

36. What is the largest moon on Saturn?

Answer:: Titan

 

37. How many planets are in our solar system?

Answer: Eight

 

38. What is the name of the largest volcano in our solar system?

Answer: Olympus Mons

 

39. How long does it take for the Earth to complete one orbit around the sun?

Answer:365 days or 1 year

 

40. What forms at the end of a star’s life?

Answer:A black hole

 

41. What is a parsec?

Answer: A unit of length to measure long distances of astronomical objects equal to 3.26 light years

 

42. How many colors are in a rainbow?

Answer: Seven

 

43. What instrument is used to measure your temperature?

Answer: Thermometer

 

44. Which baby animal does not look like it’s parent?

Answer: Caterpillar

 

45. What are animals that eat dead or decaying matter called?

Answer: Scavengers

 

46. What is the process which plants use to make food?

Answer:Photosynthesis

 

47. Which mammal lays eggs?

Answer: Platypus and Echidnas

 

48. What does photosynthesis produce?

Answer: Water vapour, Oxygen, and Sugar

 

49. What is the strongest bone in the human body?

Answer: Thigh Bone or Femur

 

50. What is the speed of light?

Answer:  Answer: 299,792,458 

 

51. What part of the plant conducts photosynthesis?

Answer: The leaves

 

52. What do you call an animal that only eats plants?

Answer: Herbivore

 

53. What is the unit used to measure electrical current?

Answer: Ampere

 

54. What type of energy is stored in food?

Answer: Chemical energy

 

55. Which vitamin is primarily produced when the skin is exposed to sunlight?

Answer: Vitamin D

 

56. What is the smallest unit of life that can replicate independently?

Answer: A cell

 

57. What’s the name of the force that keeps planets in orbit around the sun?

Answer: Gravity

 

58. What is the name of the process where plants lose water through their leaves?

Answer: Transpiration

 

59. What part of the brain controls balance and coordination?

Answer: The cerebellum

 

60. What organ is responsible for pumping blood throughout the body?

Answer: The heart

 

61. What gas do humans exhale?

Answer: Carbon dioxide

 

62. What is the name of the scientist who proposed the three laws of motion?

Answer: Isaac Newton

 

63. What is the name of the protective layer around Earth that absorbs most of the sun’s ultraviolet radiation?

Answer: The ozone layer

 

64. What is the most abundant metal in Earth’s crust?

Answer: Aluminum

 

65. What is the name of the process that breaks down food into nutrients in the body?

Answer: Digestion

 

66. What’s the name of the organ that helps filter waste from the blood?

Answer: Kidney

 

67. What’s the name for molten rock after it erupts from a volcano?

Answer: Lava

 

68. What planet has a giant red storm known as the Great Red Spot?

Answer: Jupiter

 

69. Which organ helps humans breathe?

Answer: Lungs

 

70. What force pulls objects toward the center of the Earth?

Answer: Gravity

 

71. What type of celestial body is the moon?

Answer: A natural satellite

 

72. What gas do neon signs contain?

Answer: Neon

 

73. Which part of the eye controls how much light enters?

Answer: The pupil

 

74. What instrument is used to see very small objects?

Answer: Microscope

 

75. What is the term for water falling from clouds as rain, snow, sleet, or hail?

Answer: Precipitation

 

So, how’d you do? We hope you enjoyed these trivia questions, but remember, the fun doesn’t have to end here. Create your own questions and challenge your kids to expand their knowledge on science and see what you can discover!