100+ Science Quiz Questions With Answers

Science is everywhere! It helps us understand the world, from tiny atoms to the vast universe.

Whether you’re a student, a trivia lover, or just curious, science quizzes are a fun way to test what you know and learn new things.

In this blog, we’ve compiled 100 science quiz questions with answers on topics such as physics, chemistry, biology, earth science, and inventions.

The questions range from easy to tricky, so there’s something for everyone.

Ready to get started? Grab a pen and paper, take the quiz, and see how many you get right!

100 Science Trivia Questions With Answers

Physics Trivia

1. What force pulls objects toward the center of the Earth?
   Answer: Gravity

2. What type of energy is stored in an object due to its position or height?
   Answer: Potential energy

3. What law states that an object in motion stays in motion unless acted upon by an external force?
   Answer: Newton’s First Law of Motion (Law of Inertia)

4. What is the SI unit for measuring force?
   Answer: Newton (N)

5. What do we call the bending of light as it passes from one medium to another?
   Answer: Refraction

6. What type of wave requires a medium to travel through, such as sound waves?
   Answer: Mechanical wave

7. What is the difference between speed and velocity?
   Answer: Velocity includes direction, while speed does not.

8. What do we call the measure of how much matter an object contains?
   Answer: Mass

9. What is the formula for calculating work in physics?
   Answer: Work = Force × Distance

10. What is the acceleration due to gravity on Earth?
    Answer: 9.8 m/s²

11. What type of energy transformation happens in a flashlight?
    Answer: Chemical energy → Electrical energy → Light energy

12. What is the tendency of an object to resist a change in motion?
    Answer: Inertia

13. What simple machine is a slanted surface used to reduce effort force?
    Answer: Inclined plane

14. What is the SI unit for measuring energy?
    Answer: Joule (J)

15. What happens to the frequency of a sound wave if the pitch increases?
    Answer: The frequency increases.

16. What is the force that opposes motion between two surfaces in contact?
    Answer: Friction

17. What color of light has the shortest wavelength?
    Answer: Violet

18. What happens to an object’s kinetic energy when its velocity doubles?
    Answer: The kinetic energy quadruples.

19. What type of material allows electricity to flow easily?
    Answer: Conductor

20. What is the main difference between series and parallel circuits?
    Answer: In a series circuit, the current flows in a single path; in a parallel circuit, it has multiple paths.

Chemistry Trivia

21. What is the smallest unit of an element?
    Answer: Atom

22. What is the center of an atom called?
    Answer: Nucleus

23. What are the three subatomic particles found in an atom?
    Answer: Protons, neutrons, and electrons

24. What is the chemical symbol for sodium?
    Answer: Na

25. What is the most abundant gas in Earth’s atmosphere?
    Answer: Nitrogen (N₂)

26. What do we call a substance that cannot be broken down into simpler substances?
    Answer: Element

27. What is the pH range of an acid?
    Answer: 0 to less than 7

28. What is the name of the process where a liquid changes to a gas?
    Answer: Evaporation

29. What do we call a change in matter where a new substance is formed?
    Answer: Chemical change

30. What is the chemical formula for carbon dioxide?
    Answer: CO₂

31. What is the atomic number of an element?
    Answer: The number of protons in its nucleus

32. What is an example of a chemical reaction?
    Answer: Rusting of iron, burning wood, or baking a cake

33. What are the vertical columns on the periodic table called?
    Answer: Groups or families

34. What type of bond is formed when atoms share electrons?
    Answer: Covalent bond

35. What are the rows on the periodic table called?
    Answer: Periods

36. What is the chemical symbol for gold?
    Answer: Au

37. What happens to atoms in a chemical reaction?
    Answer: They rearrange to form new substances.

38. What is the universal solvent?
    Answer: Water

39. What is the term for a substance that speeds up a chemical reaction without being used up?
    Answer: Catalyst

40. What is the charge of a proton?
    Answer: Positive (+)

Biology Trivia

41. What is the basic unit of life?
    Answer: The cell

42. What part of the cell controls its activities?
    Answer: The nucleus

43. What is the process by which plants make their own food?
    Answer: Photosynthesis

44. What organ system is responsible for pumping blood throughout the body?
    Answer: Circulatory system

45. What is the powerhouse of the cell?
    Answer: Mitochondria

46. What is the function of red blood cells?
    Answer: To carry oxygen throughout the body

47. What is the largest organ in the human body?
    Answer: The skin

48. What is the process by which organisms produce offspring?
    Answer: Reproduction

49. What type of organism can make its own food?
    Answer: Autotroph (e.g., plants)

50. What is the process of breaking down food into energy?
    Answer: Cellular respiration

51. What organ in the human body is responsible for filtering waste from the blood?
    Answer: Kidneys

52. What is the function of the immune system?
    Answer: To protect the body from infections and diseases

53. What is the name of the process where a caterpillar becomes a butterfly?
    Answer: Metamorphosis

54. What is the term for an animal that only eats plants?
    Answer: Herbivore

55. What is the name of the longest bone in the human body?
    Answer: Femur (thigh bone)

56. What is DNA short for?
    Answer: Deoxyribonucleic acid

57. What gas do humans breathe in to survive?
    Answer: Oxygen (O₂)

58. What part of the plant absorbs water and nutrients?
    Answer: Roots

59. What organ allows humans to breathe?
    Answer: Lungs

60. What is the name of the process in which cells divide to create new cells?
    Answer: Mitosis

Earth Science & Astronomy

61. What are the four main layers of the Earth?
    Answer: Crust, Mantle, Outer Core, Inner Core

62. What type of rock forms from cooling lava or magma?
    Answer: Igneous rock

63. What do we call the shaking of the Earth’s surface caused by the movement of tectonic plates?
    Answer: Earthquake

64. What is the most abundant gas in Earth’s atmosphere?
    Answer: Nitrogen (N₂)

65. What do we call the natural process that wears down rocks over time?
    Answer: Weathering

66. What is the hottest layer of the Earth?
    Answer: Inner Core

67. What is the name of the supercontinent that existed millions of years ago?
    Answer: Pangaea

68. What is the rock cycle?
    Answer: The continuous process of rock formation and change

69. What do we call a huge, rotating storm that forms over warm ocean waters?
    Answer: Hurricane

70. What is the process by which plants release water vapor into the air?
    Answer: Transpiration

71. What is the only planet in our solar system known to support life?
    Answer: Earth

72. What force keeps planets in orbit around the Sun?
    Answer: Gravity

73. What is the largest planet in the solar system?
    Answer: Jupiter

74. What celestial body orbits the Earth?
    Answer: The Moon

75. What is the name of our galaxy?
    Answer: The Milky Way

76. What is a black hole?
    Answer: A region of space with gravity so strong that nothing can escape it

77. What is the closest star to Earth?
    Answer: The Sun

78. What is the term for a rock that enters Earth’s atmosphere and burns up?
    Answer: Meteor

79. What is the red planet?
    Answer: Mars

80. What is the name of the telescope that has provided detailed images of space since 1990?
    Answer: Hubble Space Telescope

General Science & Innovations

81. What is the scientific method?
    Answer: A process used to investigate questions and test hypotheses through experiments

82. What do we call a statement based on observations and past knowledge?
    Answer: Inference

83. What is the study of matter and energy called?
    Answer: Physics

84. What is the study of living organisms called?
    Answer: Biology

85. What is the study of the Earth’s physical structure and history called?
    Answer: Geology

86. Who developed the theory of relativity?
    Answer: Albert Einstein

87. Who is known as the father of modern physics?
    Answer: Isaac Newton

88. Who invented the first practical telephone?
    Answer: Alexander Graham Bell

89. What scientist is famous for discovering gravity?
    Answer: Isaac Newton

90. What was Marie Curie known for?
    Answer: Discovering radioactivity and the elements polonium and radium

91. What invention allowed people to communicate over long distances for the first time?
    Answer: The telegraph

92. Who is credited with inventing the light bulb?
    Answer: Thomas Edison

93. What medical breakthrough was discovered by Alexander Fleming?
    Answer: Penicillin (the first antibiotic)

94. What was the first artificial satellite launched into space?
    Answer: Sputnik 1

95. Who was the first person to step on the Moon?
    Answer: Neil Armstrong

96. What do we call a robotic vehicle sent to explore other planets?
    Answer: A rover

97. What is the main purpose of the International Space Station (ISS)?
    Answer: To conduct scientific research in space

98. Who is known for the laws of planetary motion?
    Answer: Johannes Kepler

99. What invention made mass production of books possible?
    Answer: The printing press

100. What scientist is credited with developing the modern periodic table?
     Answer: Dmitri Mendeleev

Fun Science Trivia (Bonus Section)

101. What is the only metal that is liquid at room temperature?
     Answer: Mercury

102. What is the fastest land animal?
     Answer: Cheetah

103. What causes the ocean tides to rise and fall?
     Answer: The gravitational pull of the Moon

104. What is the loudest animal in the world?
     Answer: The sperm whale

105. What animal has the longest lifespan?
     Answer: The Greenland shark (can live over 400 years)

106. What do we call a scientist who studies fossils?
     Answer: Paleontologist

107. What is the only planet that rotates on its side?
     Answer: Uranus

108. What do we call an animal that can survive without water for years?
     Answer: Tardigrade (Water Bear)

109. What is the rarest blood type?
     Answer: AB-negative

110. What is the tallest mountain in the world?
     Answer: Mount Everest

111. What is the hardest natural substance on Earth?
     Answer: Diamond

112. What is the name of the brightest star in the night sky?
     Answer: Sirius

113. What is the only mammal capable of true flight?
     Answer: Bat

114. What color is polar bear fur?
     Answer: Transparent (appears white due to light reflection)

115. What part of the human body never stops growing?
     Answer: Nose and ears

116. How long does it take light from the Sun to reach Earth?
     Answer: About 8 minutes and 20 seconds

117. What is the smelliest substance on Earth?
     Answer: The chemical “thioacetone,” known for its extreme odor

118. What is the only planet that spins backward compared to the others?
     Answer: Venus

119. What percentage of the human body is made of water?
     Answer: About 60%

120. What is the rarest natural element found on Earth?
     Answer: Astatine

121. What is the only letter that does not appear in any U.S. state name?
     Answer: Q

122. What gas do humans exhale after breathing in oxygen?
     Answer: Carbon dioxide (CO₂)

123. What is the only planet named after a female figure?
     Answer: Venus

124. What is the most common element in the universe?
     Answer: Hydrogen

125. What is the smallest bone in the human body?
     Answer: The stapes (in the ear)

126. What type of animal lays the largest eggs?
     Answer: The ostrich

127. What type of rock is formed under extreme heat and pressure?
     Answer: Metamorphic rock

128. What is the only food that never spoils?
     Answer: Honey

129. What is the name of the largest volcano in the solar system?
     Answer: Olympus Mons (on Mars)

130. What is the name of the study of earthquakes?
     Answer: Seismology

131. What is the deepest known point in the ocean?
     Answer: The Mariana Trench

132. What is the name of the organ that produces insulin in the human body?
     Answer: The pancreas

133. What is the only continent without ants?
     Answer: Antarctica

134. What is the fastest bird in the world?
     Answer: Peregrine falcon

135. How many hearts does an octopus have?
     Answer: Three

136. What is the largest organ inside the human body?
     Answer: The liver

137. What type of cloud produces thunderstorms?
     Answer: Cumulonimbus clouds

138. What animal can regenerate its limbs?
     Answer: Axolotl (or starfish)

139. What is the only planet in our solar system that rotates clockwise?
     Answer: Venus

140. What is the most common blood type?
     Answer: O-positive

141. What was the first living creature sent into space?
     Answer: Laika, a dog from the Soviet Union

142. What animal has blue blood?
     Answer: Horseshoe crab

143. What is the most widely consumed drink in the world after water?
     Answer: Tea

144. What is the only mammal born with horns?
     Answer: Giraffe

145. What is the name of the unit used to measure sound?
     Answer: Decibel (dB)

146. How many legs does a lobster have?
     Answer: Ten

147. What is the color of a giraffe’s tongue?
     Answer: Purple or dark blue

148. What is the rarest eye color in humans?
     Answer: Green

149. What is the hottest planet in our solar system?
     Answer: Venus

150. What do we call an animal that eats both plants and meat?
     Answer: Omnivore

151. What is the chemical formula for table salt?
     Answer: NaCl

152. What is the strongest muscle in the human body relative to its size?
     Answer: The jaw (masseter)

153. What type of energy is stored in food?
     Answer: Chemical energy

154. What is the largest species of shark?
     Answer: Whale shark

155. What type of rock is formed from cooled lava?
     Answer: Igneous rock

156. What is the scientific name for the study of insects?
     Answer: Entomology

157. What metal is liquid at room temperature besides mercury?
     Answer: Gallium

158. What is the chemical symbol for lead?
     Answer: Pb

159. What gas is responsible for the Earth’s ozone layer?
     Answer: Ozone (O₃)

160. What is the hardest part of the human body?
     Answer: Tooth enamel

161. What is the deepest lake in the world?
     Answer: Lake Baikal

162. What is the fastest-growing plant in the world?
     Answer: Bamboo

163. How many bones are in the adult human body?
     Answer: 206

164. What color is blood before it is exposed to oxygen?
     Answer: Dark red (not blue—veins just appear blue under the skin)

165. What is the hottest substance ever recorded on Earth?
     Answer: The plasma in a nuclear fusion experiment (~4 trillion degrees Celsius)

166. What does DNA stand for?
     Answer: Deoxyribonucleic acid

167. What is the longest river in the world?
     Answer: The Nile River

Conclusion

How did you do? Did you get a lot right?

Science is full of amazing facts and discoveries. There’s always something new to learn!

It helps us understand how our bodies work, how nature changes, and even how we use technology daily.

We hope you had fun with this quiz!

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