1. What has atoms but no mass you can feel?
Answer: Air

2. What disappears when you measure it?
Answer: Quantum state

3. What travels faster than sound but isn’t light?
Answer: Shockwave

4. What’s full of holes yet can hold water?
Answer: Sponge

5. What goes up but never leaves Earth?
Answer: Temperature

6. What element loves parties?
Answer: Helium

7. What can split yet never truly break?
Answer: Atom

8. What gets hotter the more it moves?
Answer: Molecules

9. What never sleeps but keeps everything in motion?
Answer: Energy

10. What’s invisible, weightless, but can crush you?
Answer: Air pressure

11. What’s born when two atoms bond?
Answer: Molecule

12. What can you break without touching it?
Answer: Sound barrier

13. What holds the universe together but can’t be seen?
Answer: Gravity

14. What flows through wires but isn’t water?
Answer: Electricity

15. What’s small enough to build the world but unseen by eyes?
Answer: Atom

16. What burns without flame?
Answer: Chemical reaction

17. What gets smaller the more you look into it?
Answer: Atom

18. What has rings but no finger?
Answer: Saturn

19. What gives light but dies doing so?
Answer: Candle

20. What’s heavier — a kilogram of feathers or a kilogram of steel?
Answer: Same weight

21. What’s always moving but goes nowhere?
Answer: Time

22. What can freeze fire and burn ice?
Answer: Plasma

23. What can turn solid to liquid to gas?
Answer: Heat

24. What expands when you heat it, except one?
Answer: Water

25. What’s found at the end of every rainbow?
Answer: Light spectrum

26. What can split rock but isn’t alive?
Answer: Ice

27. What travels endlessly yet never tires?
Answer: Light

28. What exists in all states at once, until observed?
Answer: Quantum particle

29. What’s the only thing that can travel in a vacuum?
Answer: Light

30. What moves faster in hot air than cold air?
Answer: Sound

31. What’s measured in newtons but isn’t new?
Answer: Force

32. What you can’t see but gives you life?
Answer: Oxygen

33. What falls up in space?
Answer: Nothing (zero gravity)

34. What’s so cold it can burn?
Answer: Liquid nitrogen

35. What’s the smallest piece of everything?
Answer: Atom

36. What’s made of protons, neutrons, and electrons?
Answer: Atom

37. What bends light but isn’t glass?
Answer: Water

38. What turns invisible when mixed with water?
Answer: Salt

39. What can you hear but never see?
Answer: Sound wave

40. What burns brightest with no fuel?
Answer: The Sun

41. What’s constant but always changing?
Answer: Energy

42. What can’t be created or destroyed, only changed?
Answer: Energy

43. What moves without legs or wings?
Answer: Current

44. What can see through walls but not water?
Answer: X-rays

45. What’s lighter than air but can fill a balloon?
Answer: Helium

46. What can cool and heat at the same time?
Answer: Friction

47. What eats light for a living?
Answer: Black hole

48. What’s faster than anything known?
Answer: Light

49. What makes up 99% of your body but you can’t see it?
Answer: Empty space in atoms

50. What can you measure with a Richter scale?
Answer: Earthquake

51. What protects you from solar wind?
Answer: Earth’s magnetic field

52. What makes thunder roar?
Answer: Expanding air

53. What can push without touching?
Answer: Magnetism

54. What can be positive or negative but isn’t emotion?
Answer: Electric charge

55. What has a nucleus but no government?
Answer: Atom

56. What gets hotter the closer you move away from it in space?
Answer: The Sun’s corona

57. What’s bright but cold in space?
Answer: Stars

58. What travels in waves but can’t surf?
Answer: Light

59. What’s so tiny that billions fit in a grain of sand?
Answer: Molecules

60. What’s the speed limit of the universe?
Answer: Speed of light

61. What can explode without fire?
Answer: Star

62. What spins Earth without touching it?
Answer: Gravity

63. What gives energy to all but takes from none?
Answer: Sun

64. What forms clouds yet can crush ships?
Answer: Water

65. What gives you life but can drown you?
Answer: Oxygen

66. What turns water into air?
Answer: Evaporation

67. What can make metal float?
Answer: Magnetism

68. What can bend but never break?
Answer: Light wave

69. What gets sharper the colder it becomes?
Answer: Ice

70. What burns blue but not with fire?
Answer: Electricity

71. What’s invisible but gives direction?
Answer: Magnetic field

72. What can cool down hot metal instantly?
Answer: Liquid nitrogen

73. What travels in both waves and particles?
Answer: Light

74. What changes shape but not amount?
Answer: Matter

75. What always finds its level?
Answer: Water

76. What forms rings without jewelry?
Answer: Saturn

77. What happens when atoms share?
Answer: Covalent bond

78. What is created by friction but not seen?
Answer: Heat

79. What can stop time for a beam of light?
Answer: Black hole

80. What rises yet cools as it goes higher?
Answer: Air

81. What can move a train without a wheel?
Answer: Magnetism

82. What can’t exist without opposite charge?
Answer: Electricity

83. What has mass but no volume?
Answer: Energy

84. What eats planets for breakfast?
Answer: Black hole

85. What can turn invisible to the eye but not to instruments?
Answer: Infrared light

86. What keeps you grounded without strings?
Answer: Gravity

87. What can bend time and space?
Answer: Gravity

88. What happens when water meets salt?
Answer: Dissolution

89. What forms when light splits?
Answer: Spectrum

90. What cools Earth but burns skin?
Answer: Sunlight

91. What can you’t see but keeps you breathing?
Answer: Oxygen

92. What freezes faster — hot or cold water?
Answer: Hot water (Mpemba effect)

93. What keeps planets in their dance?
Answer: Gravity

94. What keeps matter from collapsing?
Answer: Electromagnetic repulsion

95. What can both destroy and create stars?
Answer: Gravity

96. What can’t escape a black hole?
Answer: Light

97. What vibrates but doesn’t move forward?
Answer: Sound wave

98. What exists everywhere but is nothing?
Answer: Vacuum

99. What has space but no air?
Answer: Universe

100. What’s the mystery that keeps everything working but still unknown?
Answer: Dark matter