61. The approximate age of the moon is 4.53 billion years.
62. Folate works together with vitamin B-12 to produce new red blood cells.
63. The mirrors used in automobiles are convex.
64. “Bar” is the unit of atmospheric pressure.
65. Normal rain is slightly acidic due to carbon dioxide and water in clouds reacting to form carbonic acid.
66. The scientific study of insects is known as entomology.
67. The temperature of the surface of the Sun is 5,778 Kelvin.
68. The Sun is at an average distance of about 150 million kilometers away from Earth.
69. The density of water is maximum.
70. Inhaled air passes through the bronchiole in the last.
71. Winter Solstice means the longest night.
72. The founder of the solar system is Copernicus.
73. The study of the weather is called meteorology.
74. Vitamin B is found in seeds.
75. During a total solar eclipse, there is most likely to be a decrease in the rate of photosynthesis.
76. The second most abundant metal found in the Earth’s crust is aluminium.
77. In the electricity meter, the digit to the extreme right is 1/10th of the unit.
78. Saliva contains amylases.
79. Nail polish remover contains acetone.
80. Earth rotates around the Sun in 23 hours 56 minutes 4 seconds.