GK

 

Science related General Knowledge for Gullu for Olympiad and any competitive exam

Physics:

1. What is the SI unit of force? → Newton

2. What is the speed of light in a vacuum? → 3 × 10⁸ m/s

3. Who formulated the three laws of motion? → Isaac Newton

4. What is the SI unit of power? → Watt

5. What is the unit of electric current? → Ampere

6. Which color has the shortest wavelength? → Violet

7. What is the main source of energy for the Earth? → The Sun

8. What is the phenomenon of splitting light into its colors called? → Dispersion

9. What type of mirror is used in car rearview mirrors? → Convex Mirror

10. What is the SI unit of pressure? → Pascal

Chemistry

11. What is the chemical formula of water? → H₂O

12. What is the pH value of pure water? → 7

13. What is the chemical symbol for gold? → Au

14. What is the atomic number of oxygen? → 8

15. What gas do plants absorb during photosynthesis? → Carbon dioxide (CO₂)

16. What is the most abundant gas in Earth's atmosphere? → Nitrogen (78%)

17. What is the common name of NaCl? → Salt

18. Which metal is the best conductor of electricity? → Silver

19. What is dry ice made of? → Solid carbon dioxide (CO₂)

20. What is the chemical formula of sulfuric acid? → H₂SO₄

Biology

21. What is the powerhouse of the cell? → Mitochondria

22. Which vitamin is produced in the human body when exposed to sunlight? → Vitamin D

23. What is the main function of red blood cells? → Transport oxygen

24. What is the longest bone in the human body? → Femur (thigh bone)

25. Which organ in the human body purifies blood? → Kidney

26. What is the smallest unit of life? → Cell

27. What pigment gives plants their green color? → Chlorophyll

28. What is the study of fungi called? → Mycology

29. Which part of the human brain controls balance? → Cerebellum

30. What is the largest organ in the human body? → Skin

Earth & Space Science

31. What is the closest planet to the Sun? → Mercury

32. What causes tides in the ocean? → The Moon’s gravitational pull

33. What is the Earth's outermost layer called? → Crust

34. What is the primary gas found on Jupiter? → Hydrogen

35. What is the name of the galaxy we live in? → Milky Way

36. What is the hottest planet in the Solar System? → Venus

37. What protects the Earth from harmful UV rays? → Ozone Layer

38. What type of rock is formed from cooled lava? → Igneous Rock

39. What is the name of the natural satellite of Earth? → Moon

40. What is a group of stars forming a pattern called? → Constellation

General Science

41. What is the SI unit of temperature? → Kelvin

42. What is the hardest natural substance on Earth? → Diamond

43. What is used to measure atmospheric pressure? → Barometer

44. What is an instrument used to measure humidity? → Hygrometer

45. What does DNA stand for? → Deoxyribonucleic Acid

46. What is the most common element in the human body? → Oxygen

47. What is the boiling point of water at sea level? → 100°C (212°F)

48. What is the freezing point of water? → 0°C (32°F)

49. What type of energy is stored in food? → Chemical energy

50. Which gas is known as "laughing gas"? → Nitrous Oxide (N₂O)

Technology & Innovations

51. Who invented the telephone? → Alexander Graham Bell

52. What is the full form of USB? → Universal Serial Bus

53. Who is known as the father of computers? → Charles Babbage

54. What does Wi-Fi stand for? → Wireless Fidelity

55. What is the main function of a CPU? → Processing data

56. Who discovered penicillin? → Alexander Fleming

57. What metal is commonly used in batteries? → Lithium

58. What is artificial intelligence? → Machine-based intelligence

59. What type of lens is used in magnifying glasses? → Convex lens

60. What is the full form of LED? → Light Emitting Diode

Human Body & Health

61. What is the normal body temperature in Celsius? → 37°C

62. What is the function of the heart? → Pumping blood

63. Which vitamin is known as ascorbic acid? → Vitamin C

64. What organ produces insulin? → Pancreas

65. What is the function of white blood cells? → Fight infections

66. What is the longest nerve in the human body? → Sciatic nerve

67. How many teeth does an adult human have? → 32

68. What is the function of the liver? → Detoxification

69. What is the largest artery in the human body? → Aorta

70. What are the three main types of blood cells? → Red, white, and platelets

Miscellaneous Science

71. What gas do humans exhale? → Carbon dioxide (CO₂)

72. What metal is liquid at room temperature? → Mercury

73. What is the chemical formula of methane? → CH₄

74. What is photosynthesis? → Process by which plants make food using sunlight

75. Which planet is known as the Red Planet? → Mars

76. How many bones are there in a newborn baby? → Around 300

77. What is the common name for H₂O₂? → Hydrogen peroxide

78. What is the study of plants called? → Botany

79. What type of blood cells help in clotting? → Platelets

80. What is the study of animals called? → Zoology

Bonus Questions

81. What is the fastest land animal? → Cheetah

82. What is the main gas in the Sun? → Hydrogen

83. What is a tsunami? → A large sea wave caused by an underwater earthquake

84. What is the most common blood type? → O+

85. What type of rock is marble? → Metamorphic

86. What instrument is used to measure wind speed? → Anemometer

87. What are the three states of matter? → Solid, Liquid, Gas

88. What is the term for an animal that eats both plants and meat? → Omnivore

89. What are the small bones in the ear called? → Ossicles

90. What is an ecosystem? → A community of living and non-living things

91. What is the smallest planet in the solar system? → Mercury

92. What gas do plants release? → Oxygen

93. What is another name for vitamin B1? → Thiamine

94. What is the main function of chloroplasts? → Photosynthesis

95. What is the biggest planet in the Solar System? → Jupiter

96. What is the pH range of acids? → Below 7

97. What is the term for water turning into gas? → Evaporation

98. What part of the cell contains genetic material? → Nucleus

99. Which organ filters toxins from the blood? → Liver

100. What is the force that pulls objects toward Earth? → Gravity

Here are 100 more General Knowledge (GK) questions and answers related to basic science:

Physics (Mechanics, Motion & Energy)

101. What is the SI unit of work? → Joule (J)

102. What is Newton’s first law of motion also called? → Law of Inertia

103. What type of energy is stored in a stretched rubber band? → Potential Energy

104. What is the force that opposes motion between two surfaces? → Friction

105. What is the SI unit of velocity? → Meters per second (m/s)

106. What does the term "acceleration" mean? → Rate of change of velocity

107. What is kinetic energy? → Energy of a moving object

108. What is the acceleration due to gravity on Earth? → 9.8 m/s²

109. What is the unit of frequency? → Hertz (Hz)

110. What type of waves are sound waves? → Longitudinal Waves

Physics (Light, Sound & Heat)

111. What is the law of reflection? → Angle of incidence = Angle of reflection

112. What type of mirror is used in a makeup mirror? → Concave Mirror

113. What is the bending of light as it passes from one medium to another called? → Refraction

114. What are the primary colors of light? → Red, Green, Blue (RGB)

115. What is the speed of sound in air? → Approximately 343 m/s

116. What is the SI unit of heat energy? → Joule (J)

117. What is absolute zero in Celsius? → -273.15°C

118. What is the principle of conservation of energy? → Energy cannot be created or destroyed, only transferred or converted

119. What is resonance? → When an object vibrates at its natural frequency due to external vibrations

120. Which type of waves require a medium to travel? → Mechanical Waves

Chemistry (Elements & Compounds)

121. What is the most abundant element in the universe? → Hydrogen

122. What is the atomic number of carbon? → 6

123. What is the chemical symbol for silver? → Ag

124. What are the three states of matter? → Solid, Liquid, Gas

125. What is an isotope? → Atoms of the same element with different numbers of neutrons

126. What is the lightest element? → Hydrogen

127. What is the heaviest naturally occurring element? → Uranium (U)

128. What is the main component of natural gas? → Methane (CH₄)

129. What is the chemical formula of baking soda? → NaHCO₃

130. What is the pH range of bases? → Above 7

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Biology (Cells & Microorganisms)

131. Who discovered the cell? → Robert Hooke

132. What is the basic unit of life? → Cell

133. What is the function of ribosomes? → Protein synthesis

134. Which part of a plant cell provides support? → Cell Wall

135. What are bacteria? → Single-celled microorganisms

136. What is the main function of the Golgi apparatus? → Packaging and transport of proteins

137. What is an example of a prokaryotic organism? → Bacteria

138. What type of cell does not have a nucleus? → Prokaryotic Cell

139. What is the liquid part of blood called? → Plasma

140. What is an antibiotic? → A substance that kills bacteria

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Biology (Human Body & Health)

141. What is the main function of the lungs? → Exchange of gases (oxygen and carbon dioxide)

142. What part of the human brain controls thinking and memory? → Cerebrum

143. What is the function of hemoglobin? → Carries oxygen in red blood cells

144. What is the body’s first line of defense against infections? → Skin

145. What is the largest gland in the human body? → Liver

146. What is the function of the small intestine? → Absorption of nutrients

147. What is the function of the large intestine? → Water absorption and waste elimination

148. What is the function of the nervous system? → Transmit signals between the brain and body

149. What is the function of the endocrine system? → Regulate hormones

150. What is the function of the skeletal system? → Support and protect the body

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Earth Science (Geology & Weather)

151. What are the three main types of rocks? → Igneous, Sedimentary, Metamorphic

152. What layer of Earth lies beneath the crust? → Mantle

153. What is the innermost layer of Earth called? → Core

154. What causes earthquakes? → Movement of tectonic plates

155. What is the study of fossils called? → Paleontology

156. What is a volcano? → An opening in Earth's crust that releases lava, gas, and ash

157. What is the instrument used to measure earthquakes? → Seismograph

158. What is the most abundant gas in Earth's atmosphere? → Nitrogen (78%)

159. What is the ozone layer? → A layer of ozone gas that protects Earth from UV radiation

160. What is the process of water changing from gas to liquid called? → Condensation

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Astronomy & Space Science

161. What is the largest planet in the solar system? → Jupiter

162. What is the Sun primarily made of? → Hydrogen and Helium

163. What is a comet made of? → Ice, dust, and gas

164. What is a black hole? → A region in space where gravity is so strong that nothing can escape

165. What is the only planet known to support life? → Earth

166. What is the brightest object in the night sky after the Moon? → Venus

167. What is the name of our galaxy? → Milky Way

168. What causes the phases of the Moon? → The Moon's position relative to the Sun and Earth

169. What is an asteroid? → A small rocky body orbiting the Sun

170. What planet is known as the "Morning Star"? → Venus

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Miscellaneous Science Questions

171. Who is known as the "Father of Modern Physics"? → Albert Einstein

172. What is the scientific name for humans? → Homo sapiens

173. What is the force that keeps planets in orbit? → Gravity

174. What type of blood can be donated to anyone? → O- (Universal Donor)

175. What is the SI unit of electric charge? → Coulomb (C)

176. What is the symbol for tungsten on the periodic table? → W

177. What gas makes up most of the Sun’s mass? → Hydrogen

178. What is the process by which plants release oxygen? → Photosynthesis

179. What is the study of ecosystems called? → Ecology

180. What is the smallest planet in the solar system? → Mercury

Happy learning with Noor E Alam 

University of Dhaka 

English Medium Teacher