100 Science Questions with One-word Answers

100 Science Questions with One-word Answers

  1. What is the chemical symbol for hydrogen? – H
  2. What is the center of an atom called? – Nucleus
  3. What planet is known as the Red Planet? – Mars
  4. What is the powerhouse of the cell? – Mitochondria
  5. What is the chemical symbol for water? – H2O
  6. What is the largest planet in our solar system? – Jupiter
  7. What is the hardest natural substance on Earth? – Diamond
  8. What is the process plants use to make food? – Photosynthesis
  9. What is the chemical symbol for gold? – Au
  10. What is the primary gas in Earth’s atmosphere? – Nitrogen
  11. What is the chemical symbol for oxygen? – O
  12. What is the most abundant element in the universe? – Hydrogen
  13. What planet is closest to the Sun? – Mercury
  14. What is the main component of the Sun? – Hydrogen
  15. What is the chemical symbol for silver? – Ag
  16. What gas do plants absorb from the atmosphere? – Carbon
  17. What is the largest organ in the human body? – Skin
  18. What is the chemical symbol for sodium? – Na
  19. What type of celestial body is the Sun? – Star
  20. What is the chemical symbol for carbon? – C
  21. What is the basic unit of life? – Cell
  22. What is the chemical symbol for chlorine? – Cl
  23. What planet is known as Earth’s twin? – Venus
  24. What is the chemical symbol for potassium? – K
  25. What is the smallest planet in our solar system? – Mercury
  26. What is the process of converting liquid to gas? – Evaporation
  27. What is the chemical symbol for calcium? – Ca
  28. What is the organelle known as the control center of the cell? – Nucleus
  29. What is the chemical symbol for zinc? – Zn
  30. What is the main gas found in the air we breathe? – Oxygen
  31. What is the primary pigment in plants? – Chlorophyll
  32. What is the chemical symbol for helium? – He
  33. What is the most reactive metal? – Francium
  34. What is the chemical symbol for copper? – Cu
  35. What is the process by which plants lose water vapor? – Transpiration
  36. What is the chemical symbol for lead? – Pb
  37. What organ is responsible for pumping blood? – Heart
  38. What is the largest bone in the human body? – Femur
  39. What is the chemical symbol for nitrogen? – N
  40. What is the chemical symbol for phosphorus? – P
  41. What is the nearest star to Earth? – Sun
  42. What is the most common blood type? – O
  43. What is the main gas responsible for the greenhouse effect? – Carbon
  44. What is the chemical symbol for uranium? – U
  45. What is the chemical symbol for sulfur? – S
  46. What part of the cell contains the genetic material? – Nucleus
  47. What is the smallest unit of matter? – Atom
  48. What is the chemical symbol for iodine? – I
  49. What is the largest internal organ in the human body? – Liver
  50. What is the primary gas found in the Martian atmosphere? – Carbon
  51. What is the chemical symbol for boron? – B
  52. What is the name of the galaxy we live in? – Milky
  53. What is the chemical symbol for silicon? – Si
  54. What organ is responsible for detoxification? – Liver
  55. What is the chemical symbol for aluminum? – Al
  56. What is the main component of bone? – Calcium
  57. What is the process of cell division? – Mitosis
  58. What is the chemical symbol for neon? – Ne
  59. What is the layer of Earth that is liquid? – Mantle
  60. What is the chemical symbol for argon? – Ar
  61. What is the most common element in the human body? – Oxygen
  62. What is the chemical symbol for cobalt? – Co
  63. What type of blood cells carry oxygen? – Red
  64. What is the chemical symbol for nickel? – Ni
  65. What is the chemical symbol for tungsten? – W
  66. What is the main element in steel? – Iron
  67. What is the process by which cells obtain energy? – Respiration
  68. What is the chemical symbol for tin? – Sn
  69. What planet is known for its rings? – Saturn
  70. What is the main gas in Earth’s atmosphere? – Nitrogen
  71. What is the primary sugar in milk? – Lactose
  72. What is the chemical symbol for manganese? – Mn
  73. What is the outermost layer of Earth called? – Crust
  74. What is the chemical symbol for platinum? – Pt
  75. What is the chemical symbol for chromium? – Cr
  76. What is the most common element in Earth’s crust? – Oxygen
  77. What is the chemical symbol for lithium? – Li
  78. What is the process of solid to gas without liquid? – Sublimation
  79. What is the chemical symbol for fluorine? – F
  80. What is the largest planet in our solar system? – Jupiter
  81. What is the chemical symbol for radon? – Rn
  82. What is the smallest unit of a compound? – Molecule
  83. What is the chemical symbol for barium? – Ba
  84. What is the organ that filters blood? – Kidney
  85. What is the chemical symbol for bromine? – Br
  86. What is the process of gas to liquid? – Condensation
  87. What is the chemical symbol for cesium? – Cs
  88. What is the main element in diamond? – Carbon
  89. What is the chemical symbol for krypton? – Kr
  90. What is the chemical symbol for mercury? – Hg
  91. What is the chemical symbol for antimony? – Sb
  92. What is the chemical symbol for cadmium? – Cd
  93. What is the process of splitting an atom’s nucleus? – Fission
  94. What is the chemical symbol for thorium? – Th
  95. What is the chemical symbol for arsenic? – As
  96. What is the process of joining two atomic nuclei? – Fusion
  97. What is the chemical symbol for bismuth? – Bi
  98. What is the main organ in the respiratory system? – Lungs
  99. What is the chemical symbol for radium? – Ra
  100. What is the most abundant element in Earth’s atmosphere? – Nitrogen
  101. What is the chemical symbol for iodine? – I
  102. What is the lightest element? – Hydrogen
  103. What is the chemical symbol for francium? – Fr
  104. What is the chemical symbol for silicon? – Si
  105. What is the main gas in the air we breathe? – Oxygen
  106. What is the chemical symbol for neon? – Ne
  107. What is the chemical symbol for tin? – Sn
  108. What is the chemical symbol for cobalt? – Co
  109. What is the chemical symbol for silver? – Ag
  110. What is the chemical symbol for zinc? – Zn
  111. What is the chemical symbol for gold? – Au
  112. What is the chemical symbol for lead? – Pb
  113. What is the chemical symbol for copper? – Cu
  114. What is the chemical symbol for mercury? – Hg
  115. What is the chemical symbol for chlorine? – Cl
  116. What is the chemical symbol for fluorine? – F
  117. What is the chemical symbol for bromine? – Br
  118. What is the chemical symbol for manganese? – Mn
  119. What is the chemical symbol for potassium? – K
  120. What is the chemical symbol for sodium? – Na
  121. What is the chemical symbol for calcium? – Ca
  122. What is the chemical symbol for phosphorus? – P
  123. What is the chemical symbol for sulfur? – S
  124. What is the chemical symbol for magnesium? – Mg
  125. What is the chemical symbol for aluminum? – Al
  126. What is the chemical symbol for helium? – He
  127. What is the chemical symbol for boron? – B
  128. What is the chemical symbol for argon? – Ar
  129. What is the chemical symbol for krypton? – Kr
  130. What is the chemical symbol for xenon? – Xe
  131. What is the chemical symbol for radon? – Rn
  132. What is the chemical symbol for cesium? – Cs
  133. What is the chemical symbol for lithium? – Li

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