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150 Best Science Trivia Questions (Easy, Medium & Hard)

August 18, 2025 by Triviaquestions

Are you looking for the ultimate collection of science trivia questions that test your knowledge and spark curiosity? Then you’re in the right place. Our well-researched science trivia covers a wide range of topics, from fun and easy questions to advanced challenges that even experts will love. Whether you’re a student, teacher, quiz master, or here to learn new facts, these questions are perfect for you.

Dive into fascinating chemistry trivia that explores reactions, elements, and discoveries. Test your curiosity with space and astronomy questions about planets, galaxies, and the universe’s mysteries. Explore the wonders of animals, nature, and zoology. Interesting facts about ecosystems and rare species. Boost your mind with trivia on the human body and medicine, understanding how our biology works. Explore the secrets of our planet with earth science and ocean trivia, from volcanoes to deep

The combination of easy and hard science trivia makes learning fun while covering multiple topics of science. Whether you’re preparing for a quiz night, classroom activity, or just want to enhance your general knowledge, our science quiz questions are designed to educate, entertain, and inspire.

science trivia questions

Table of Contents

  • Easy Science Trivia
  • Hard Science Trivia
  • Science Trivia Questions Multiple Choice
  • Science Trivia Questions About Chemistry
  • Biology & Zoology Science Questions
  • Science Questions About Space
  • Science Trivia Questions About Animals & Nature
  • Science Trivia Game
  • Science Questions About Water
  • Science Questions About the Human Body and Medicine
  • Science Questions About Earth
  • Science Trivia About Robotics
  • Science Trivia About Oceans
  • FAQ

Easy Science Trivia

1. What is the symbol of silver?

Answer: It’s Ag from its Latin word Argentum.

2. What do you think about which source of sound travels faster? Water or air?

Answer: In water, sound travels faster

3. What is the purpose of a manometer?

Answer: It is used for measuring the pressure of any closed system.

4. What makes Aurora?

Answer: The solar wind causes changes in the particles present in the wind.

5. Who is the inventor of the first battery?

Answer: The inventor’s name is Count Alessandro Volta

6. Where was the first seismograph invented?

Answer: In China, near 200 AD.

7. Which is the largest reef, and where is it located?

Answer: Its name is the Great Barrier Reef, present in Australia.

8. Where is the Suez Canal located?

Answer: It is in Egypt.

9. Do you think the sun rotates?

Answer: Yes, it rotates in polar once in 31 days, while for once in 27 days on the equator.

Hard Science Trivia

11. What is the hottest planet in the solar system?

Answer: It is Venus

12. Do you know the distance between the moon and the Earth?

Answer: It is approximately 376500 km.

13. What is the reason that eyesight changes?

Answer: The eye’s muscles get thicker with age, thus reducing sight when a person gets older.

14. What percentage of household dust is made up of dead human skin?

Answer:Around 60–70% of household dust consists of dead skin cells.

15. Which blood type is rare in humans?

Answer: It is AB negative.

16. Do you know what pyrogen is?

Answer: It is the substance that causes fever.

17. What do you think which one has more hair follicles, brunettes or blondes?

Answer: The latter one is that blondes have more hair follicles.

18. Which country has the longest coastline?

Answer: It’s in Canada.

19. Why is the Leaning Tower of Pisa famous?

Answer: Because it leans due to an unstable foundation, though it has been stabilized to prevent collapse.

20. Name the element that burns on the surface of the water

Answer: It is potassium.

Science Trivia Questions Multiple Choice

21. Where is the leaning tower in Pisa located?

Italy

Turkey

France

Answer: Italy

22. Which is the fastest-spinning planet

Earth

Pluto

Jupiter

Answer: Jupiter

Read this also: 45+ Physics trivia questions [For students and researchers]

23. What is the age of the Earth?

4.5 billion

2.5 billion

6.9 billion years

Answer: 4.5 billion

24. Where is Notre Dame located?

France

Spain

Singapore

Answer: France

25. What is the shape of the Milky Way?

Spiral

Rectangular

circular

Answer: Spiral

26. Do you know where the Golden Gate Bridge?

Canada

Australia

USA

Answer: USA

27. What is the strongest magnet on Earth?

Neutron star

Proton

Electron

Answer: Neutron star

28. What number of hearts does an octopus have?

3

6

7

Answer: 3

29. Do you know about the heavy organ in humans?

Heart

Liver

Brain

Answer: Liver

Science Trivia Questions About Chemistry
HD landscape illustration banner for trivia category 'Science Trivia Questions About Chemistry'. Use a minimalist style with a single perfect chemistry-related icon: a glowing atomic model. Place the icon centrally with clean typography above it reading 'Science Trivia Questions About Chemistry'. Use a dark background with neon blue and purple accents to evoke a sleek lab atmosphere. Layout should be horizontal and optimized for landscape format.

31. To neutralise an acid spill, what daily used kitchen ingredient can be used?

Answer: Baking Soda

32. What is the chemical name of Baking Soda?

Answer: Sodium Bicarbonate

33. What is the reason behind fresh onion cutting making people cry?

Answer: Because of the existence of sulphur compounds (Syn-Propanethial-S-Oxide)

34. Which famous gas was first discovered through experiment by a scientist, not by observation in nature?

Answer: Oxygen

35. Who discovered Oxygen in 1774?

Answer: Joseph Priestley

36. Which chemical element is necessary to make the bones strong?

Answer: Calcium

37. Which acid is strong enough to dissolve glass?

Answer: Hydrofluoric acid

38. How many bacterial cells are in the human body?

Answer: There are ten times more bacterial cells than body cells.

39. True or false: Mercury is the only metal that forms a liquid alloy with almost every other metal?

Answer: True

40. What do we call plants and animals that live together and interact in an environment?

Answer: An ecosystem

Read more: 60+ chemistry trivia questions [element and atoms]

 

Biology & Zoology Science Questions

science trivia
41. What is the programmed death cell process called?

Answer: Apoptosis is the process

42. Who was the first man to see bacteria?

Answer: Anton van Leeuwenhoek

43. Which living organism lives without a heart

Answer: It is a Jellyfish

44. What do you name the tube-like organ in a butterfly?

Answer: The proboscis is the tube-like organ

45. Do humans have an endoskeleton or an exoskeleton?

Answer: Endoskeleton.

46. How does the human eye detect light?

Answer: With the help of retina

47. Name the man known as the father of taxonomy?

Answer: He was Carolus Linnaeus

48. Is water and salt a compound organic or inorganic?

Answer: It is an inorganic compound.

49. What type of bond is present in a water molecule?

Answer: This is known as hydrogen bonding.

50. What type of organism doesn’t need oxygen for growth?

Answer: Anaerobic type.

Science Questions About Space

51. Which planet has Phobos and Deimos’ moons?

Answer: Mars

52. Which particle accelerator is used to study conditions similar to those after the Big Bang?

Answer: The Large Hadron Collider (LHC)

53. Where is the Olympus Mons present?

Answer: It is located on Mars

54. Who was the first person who observe the rings on Saturn’s planet?

Answer: Galileo observed rings on this planet

55. Which valve is present on the left side of the human heart?

Answer: The mitral (bicuspid) valve

56. What is another name for the SA node?

Answer: It is known as the pacemaker

57. Do you know what hepatitis is?

Answer: It is the inflammation of the liver.

58. Do you know about the slowest-spinning planet in the solar system?

Answer: Yes, it is Venus

59. How long is a year on Mars?

Answer: About 687 Earth days

60. What is the zero-to-14 to 14 scale known as?

Answer: It is known as pH scale.

Try this also: 85+ Space Trivia Questions And Answers

Science Trivia Questions About Animals & Nature

61. In the desalination process, what is removed?

Answer: It is salt, as the name indicates, the desalination.

62. Which sea animal has 3 hearts and blue blood inside the body?

Answer: Octopus

63. Do you know why the flamingos turn pink?

Answer: Due to carotenoid pigments

64. Which animal can regenerate its entire body from just a small fragment?

Answer: Planarian flatworm

65. Which sea animal has a large eye?

Answer: That is the squid having 16 inches on average.

66. Do you know the fastest flying insect name in the animal kingdom?

Answer: Dragonfly

67. The animal that has the longest migration journey in the world?

Answer: Arctic tern (Travels up to 44,000 miles per year)

68. Can you name the universal solvent?

Answer: It is water

69. What are the four processes of science?

Answer: These are observation, inferences, experimentation, and deduction.

70. Due to the existence of over 200 million years, which plant is called “living fossil”?

Answer: Ginkgo biloba

Learn more about animals: https://triviaquestions4u.com/animals/

Science Trivia Game

71. How Much Do Bees Sleep

Never

6 hour

8 hours

Answer: Never

72. What do you name the water and sugar mixing process?

Mixture

Solution

Sweet syrup

Answer: Solution

73. Do you know the number of the Earth in the solar system?

Third

Fifth

First

Answer: Third

74. Do you know how many eggs do queen bee lays each day?

1000

2000

1000-2000

3000

Answer: 1000-2000

75. What SPF level is generally recommended for effective sun protection?

SPF100

SPF15

SPPF70

Answer: SPF 30 or higher

Read more: 85+ logical math questions and answers [Updated]

76. What is the best flotation device for the kid in the pool?

Life jacket

Armbands

Airbags

Answer: Life jacket

77. How far can a sloth climb up a tree?

6 to 8 feet

1 foot

12 feet

Answer: 6 to 8 feet

78. For how long do sloths sleep in a day?

20 hours

3 hours

Eight hours

Answer: 3 hours

79. Which planet is known as the Red Planet?

Mars

Pluto

earth

Answer: Mars

80. Who wrote ‘A Brief History of Time’?

Answer: A British physicist, Stephen Hawking.

81. What is the study of mushrooms called?

Answer: Mycology

82. Sound travels faster in water or air?

Answer: Water

83. What is traditional chalk made of?

Answer: Calcium carbonate, derived from limestone

84. Which is the heaviest human body organ?

Answer: Liver

85. What is the chemical symbol for water?

Answer: H2O

86. Which planet is known as the Red Planet?

Answer: Mars

87. What is the closest star to Earth?

Answer: The Sun

88. What is the hardest natural substance on Earth?

Answer: Diamond

90. What is the chemical symbol for iron?

Answer: Fe

91. What gas do plants absorb during photosynthesis?

Answer: Carbon dioxide (CO2)

92. What is the process by which plants make their own food called?

Answer: Photosynthesis

93. What is the center of an atom called?

Answer: The nucleus

94. What is the chemical symbol for gold?

Answer: Au

95. What is the fastest animal on land?

Answer: Cheetah

Science Questions About Water

97. The only substances that exist on the earth in 3 states: solid, liquid, and gas?

Answer: Water

98. Do you know the reason why ice is less dense than liquid water?

Answer: Because hydrogen bonds expand when water freezes

99. Do you know the percentage of fresh water on Earth?

Answer: Only about 2.5%

100. What is Cohesion in scientific terms?

Answer: Water’s ability to stick to itself

101. What property makes the water a universal solvent?

Answer: Its polarity allows it to dissolve more substances than any other liquid

102. How much of the human body is made of water?

Answer: 60%

103. What is the Mariana Trench, which is also called Challenger Deep?

Answer: The deepest known point in the ocean

Science Questions About the Human Body and Medicine

Science Questions About the Human Body and Medicine

104. Do you know the name of the human organ that can regenerate itself significantly?

Answer: The liver

105. The smallest human body bones exist in which part of the body?

Answer: The middle ear (Ossicles: malleus, incus, stapes)

106. The organ that has no blood supply and gets oxygen directly from the air. Do you know the organ name?

Answer: Cornea

107. Because of its complex network of neurons, which human body is called the second brain?

Answer: The gut

108. What is the average lifespan of a human red blood cell?

Answer: About 120 days

109. What is the usage of stethoscopes?

Answer: To listen to the sounds like heartbeats, lung airflow, and bowel activity

110. Which medical imaging technique uses strong magnets and radio waves?

Answer: MRI

111. Which hormone regulates blood sugar levels in the body?

Answer: Insulin

Learn more about medical: 90+ Medical Trivia Questions and Answers

Science Questions About Earth

112. Which layer of Earth generates a magnetic field?

Answer: The outer core

113. Do you know the percentage of water on Earth?

Answer: Approx 71%

114. True or false: Crust is the thinnest layer of the Earth?

Answer: True

115. Do you know which continent is moving away from Africa at about 2.5 cm per year?

Answer: South America

116. The atmosphere of the Earth covers 78% of which gas?

Answer: Nitrogen

117. Estimate how old the Earth is?

Answer: About 4.54 billion years

118. Do you know the largest hot dessert in the world?

Answer: The Sahara Desert

119. The only continent that has every type of climate?

Answer: Asia

Science Trivia About Robotics

Science Trivia About Robotics

120. In Czech, what is the original meaning of Robot?

Answer: Force labor or work

121. Do you know in which year the robot started working at the industry level?

Answer: In 1961

122. Robotics covers which type of engineering fields?

Answer: Combine mechanical engineering, electrical engineering, and computer science.

123. Do you know the name of the Japanese humanoid robot created by Honda?

Answer: ASIMO

124. Which robotic vacuum cleaner became a household name?

Answer: Roomba

125. A specific robot part, which is called the control system, has the main purpose of this part.

Answer: To process input and make decisions

126. In robotics, what does AI stand for?

Answer: Artificial Intelligence

127. Do you know the name of the humanoid robot that got citizenship in Saudi Arabia?

Answer: Sophia

Science Trivia About Oceans

128. Do you know the warmest Ocean in the world?

Answer: The Indian Ocean

129. The mountain range on Earth is mostly hidden underwater.

Answer: The Mid-Atlantic Ridge

130. Do you know the smallest and shallowest Ocean?

Answer: The Arctic Ocean

131. What do you think when you hear Ocean currents?

Answer: A continuous movement of water driven by wind, tides, and Earth’s rotation

132. To regulate Earth’s climate, which gas do Oceans absorb on a continuous basis?

Answer: Carbon Dioxide (CO2)

133. What is the layer name that separates warmer surface water from colder deep water?

Answer: Thermocline

134. Do you know what percentage of marine species are still undiscovered?

Answer: Approx 90%

FAQ

 

What is the weirdest science fact that often appears in trivia?

One of the strangest trivia examples is that octopuses have 3 hearts, and 2 of them stop beating when they swim. These types of facts make science trivia more exciting and challenging.

Can science questions make you smarter?

Yes, it’s best to recall memory, spark curiosity, which led you to learn new facts

What are science trivia questions?

Science trivia questions are short, fact-based questions related to scientific topics such as physics, chemistry, biology, space, earth science, and the human body. They are designed to test knowledge, improve learning, and make science fun for all age groups.

What are good science trivia questions?

What is the process by which plants convert sunlight into energy? Answer: Photosynthesis. How long have dragonflies been on Earth? Answer: About 300 million years. How fast does light travel? Answer: Approximately 299,792 kilometers per second

What are five scientific questions?

What is the universe made of? Answer: Mostly dark energy, dark matter, and ordinary matter. How did life begin? Answer: Through chemical processes that formed simple life over billions of years. Are we alone in the universe? Answer: Unknown — no confirmed evidence of extraterrestrial life yet. What makes us human? Answer: Consciousness, reasoning, emotions, and social behavior. What is consciousness? Answer: Awareness of thoughts, feelings, and surroundings.

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