Prepare for competitive exams with Science MCQs for CSS, PPSC, PMA, and more. Test your knowledge and improve your performance in science subjects!
1. What is the law of motion formulated by Sir Isaac Newton?
2. What is the main function of red blood cells in the human body?
3. What is the chemical symbol for sodium?
4. What is the process by which plants make their own food?
5. What is the most abundant gas in Earth's atmosphere?
6. Who developed the theory of evolution by natural selection?
7. What is the main component of the cell wall in plants?
8. What is the smallest unit of life?
9. What is the name of the first artificial Earth satellite?
10. What is the main purpose of DNA in living organisms?
11. What is the largest organ in the human body?
12. Which planet is known as the "Red Planet"?
13. What is the main component of the Sun?
14. Which of the following is NOT a part of the cell?
15. What is the most abundant gas in the Earth's atmosphere?
16. What does the process of "photosynthesis" produce?
17. What is the main function of the white blood cells in the human body?
18. Which scientist is known for his theory of relativity?
19. Which element is essential for the human body to produce thyroid hormones?
20. Which vitamin is synthesized by the human body when exposed to sunlight?
21. What is the main function of the mitochondria in cells?
22. Who is known as the father of modern chemistry?
23. What type of bond is formed when two atoms share electrons?
24. What is the process by which a liquid turns into a gas?
25. Which organ in the human body is responsible for filtering blood?
26. What type of energy is stored in food?
27. What is the study of fossils called?
28. What element is the main component of organic molecules?
29. What is the unit of force in the SI system?
30. Which gas is responsible for the greenhouse effect?
31. Which scientist is known for discovering the law of gravity?
32. What part of the plant cell is responsible for photosynthesis?
33. Which scientist is credited with discovering penicillin?
34. What is the powerhouse of the cell?
35. What is the most common element in the Earth's crust?
36. What type of electromagnetic radiation is most commonly used in cell phones?
37. Which of the following is NOT a chemical element?
38. What does DNA stand for?
39. What is the main cause of ocean acidification?
40. What is the term for the movement of water through plants?
41. What is the SI unit of electric current?
42. Which of the following is the heaviest element in the periodic table?
43. Which of the following is responsible for the green color in plants?
44. What is the basic unit of life?
45. The process of a substance changing from a liquid to a gas is called:
46. Who proposed the theory of evolution by natural selection?
47. What is the term for the chemical process by which plants make their food?
48. Which of the following is the process of nuclear decay?
49. What is the largest planet in our solar system?
50. Which gas makes up about 21% of the Earth's atmosphere?
51. What is the term for the study of earthquakes?
52. Which of the following elements is a noble gas?
53. What does the term "photosynthesis" refer to?
54. What is the chemical symbol for water?
55. What is the powerhouse of the cell?
56. Which planet is known as the "Red Planet"?
57. Which gas makes up most of the Earth's atmosphere?
58. What is the smallest unit of an element?
59. Which of the following scientists is famous for his work on the theory of relativity?
60. What is the main component of the Earth's core?
61. What is the hardest natural substance on Earth?
62. Which of the following is a primary source of energy for the Earth's climate system?
63. What is the main function of white blood cells in the human body?
64. What type of bond is formed when electrons are shared between atoms?
65. Which part of the plant is responsible for photosynthesis?
66. Which element has the chemical symbol Na?
67. What is the process by which plants lose water through small openings in their leaves called?
68. Which gas is most abundant in the Earth's atmosphere?
69. What is the main function of the mitochondria in a cell?
70. Which of the following is a characteristic of acids?
71. What is the primary function of red blood cells?
72. Which part of the brain controls balance and coordination?
73. What is the main difference between prokaryotic and eukaryotic cells?
74. Which of the following types of radiation is used in cancer treatment?
75. Which gas is released by plants during photosynthesis?
76. What is the primary component of natural gas?
77. What is the first law of thermodynamics also known as?
78. What is the primary function of the circulatory system?
79. What is the SI unit for force?
80. Which of the following is the chemical symbol for gold?
81. Which of the following is a noble gas?
82. What does the pH scale measure?
83. What type of bond is formed when electrons are transferred from one atom to another?
84. Which element is essential for the production of thyroid hormones?
85. What is the term for the study of the Earth's atmosphere and weather patterns?
86. Which organ in the human body is primarily responsible for detoxification?
87. What is the main function of chlorophyll in plants?
88. Which of the following is not a primary function of the skeletal system?
89. What type of energy is stored in food?
90. What is the second law of thermodynamics?
101. What is the atomic number of carbon?
102. What is the study of fungi called?
103. What is the unit of electric current?
104. What is the most abundant gas in Earth's atmosphere?
105. Which planet is closest to the sun?
106. What is the chemical formula for water?
107. What type of energy does a moving object possess?
108. Which process is responsible for the production of energy in the sun?
109. What is the chemical symbol for gold?
110. Which human organ is responsible for pumping blood?
111. What is the primary component of the Earth's atmosphere?
112. Which type of energy is stored in the nucleus of an atom?
113. Which planet is known as the "Red Planet"?
114. What is the basic unit of heredity in living organisms?
115. Which organ in the human body produces insulin?
116. Which of the following is a noble gas?
117. What is the SI unit of force?
118. What is the chemical formula for methane?
119. The process of turning a liquid into a gas is called:
120. Which element is essential for the formation of hemoglobin in human blood?
121. What is the process by which plants make their own food?
122. What is the powerhouse of the cell?
123. What is the chemical symbol for silver?
124. Which gas is essential for photosynthesis in plants?
125. What is the most common gas in the Earth's atmosphere?
126. What is the freezing point of water in Celsius?
127. Which of the following is the primary element in the human body by weight?
128. What does DNA stand for?
129. What is the process by which a liquid changes into a gas?
130. What is the chemical symbol for the element potassium?
131. Which part of the cell controls its activities?
132. What is the largest organ in the human body?
133. What is the main source of energy for the Earth?
134. The force that attracts objects toward the center of the Earth is called:
135. The energy stored in food is primarily in the form of:
136. Which scientist proposed the theory of evolution by natural selection?
137. What is the main function of white blood cells?
138. The chemical symbol for gold is:
139. Which gas makes up most of the Earth's atmosphere?
140. Which type of animal has a backbone?
141. The part of the plant responsible for making food is called:
142. What type of energy is produced by a moving car?
143. What is the smallest unit of an element?
144. Which of the following is a non-renewable resource?
145. The process by which green plants convert sunlight into food is known as:
146. What type of rock is formed by the cooling and solidification of lava?
147. The Moon orbits around which planet?
148. What is the primary purpose of red blood cells in humans?
149. Which of the following is NOT a form of energy?
150. The Earth’s atmosphere is composed mostly of:
151. What is the chemical formula for water?
152. Which part of the human brain is responsible for controlling breathing and heart rate?
153. Which of these is a noble gas?
154. Which of the following is the hardest natural substance?
155. The process of plants absorbing sunlight to make their food is called:
156. What type of energy is stored in a stretched spring?
157. What is the boiling point of water at sea level?
158. Which planet is known as the "Red Planet"?
159. Which of the following is NOT an organ of the human body?
160. The smallest particle of an element that retains the properties of that element is called:
161. What is the main function of white blood cells in humans?
162. Which of the following is NOT a type of rock?
163. The atomic number of an element refers to the number of:
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