126 Science Riddles For Kids and Adults (with Answers & Printable)

Take riddles to the next level with these tricky science riddles (with answers!). These clever science puzzles will test your wits and keep you entertained at the same time.

Science puzzles are a fun way to develop an interest in science and improve problem-solving skills. These 126 logical science riddles for kids and adults that are sure to help develop critical thinking combine the best of science education and fun!

• Funny science riddles for kids
• Complex scientific riddles with answers for students
• Complex scientific riddles for adults
• Easy science puzzles with answers
• Printable Science Riddles (Free PDF)

Funny science riddles for kids

Don’t let your science lessons get boring with these fun science riddles with answers for kids! These science riddles are great puzzles for the classroom and at home that will spark children’s curiosity and interest without overwhelming them.

We guarantee that these science riddles for kids will not only entertain them, but also help children learn a lot of science facts. And don’t be surprised if your kids start asking their friends these funny riddles!

1. I am neither water nor earth. I’m always wet, who am I? Answer: Wetlands

2. I am a chemical element and a Marvel character is named after me. who am i Answer: Iron!

3. I am a lizard, but also a dragon. what am i Answer: Komodo dragon!

Quick Tip: Add some fun facts for kids to these puzzles to enhance the learning process!

4. What do computer fans do on weekends? Answer: They are going on a hard drive journey!

5. What is the laziest mountain in the world? Answer: Mount Everrest!

6. Which mountain was the highest before the discovery of Everest? Answer: Mount Everest! It just hasn’t been opened yet.

7. I wear many rings, but I have no fingers. who am i Answer: Saturn!

8. How are you similar to copper and tellurium? Answer: Because they are CuTe!

9. What happens when an unstoppable force meets a stationary object? Paradox!

Related: Test your wits with Fun Science Quizzes for Kids (with Answers)!

10. I can flow and be still. I can be hot and cold. I can slip through almost anything and still be solid. what am i Answer: Water!

11. Which deer likes to fly into space? Answer: Comet!

12. When the son of water returns to his father, he dies. What is it? Answer: Ice

13. I go around the tree, but I never go inside it. what am i Answer: Tree bark.

14. Why did the computer go to the doctor? Because he had a virus!

15. Which four elements of the periodic table, combined, terrify criminals? Answer: Carbon, oxygen, phosphorus and sulfur (C+O+P+S)

16. What is at the center of gravity? Answer: The letter “V”!

17. Why are chemists so good at solving problems? Answer: Because they have all the solutions.

18. What do you get if you mix sulphur, tungsten and silver? Answer: SWAg!

19. What did the scientist say when he found 2 helium atoms? Answer: HeHe.

20. How to make a napkin dance? Answer: Add a little “boogie” to it.

21. You don’t see me, but I see you. Or rather, I can see through you. What am I? Answer: X-ray.

22. Which time period has the least weight? Answer: A light year!

Quick Tip: Try Fun Space Facts for Kids to learn more space-related questions!

23. What did one uranium-238 nucleus say to the other? Answer: I need to split!

24. Why did the electron go to the gym? Answer: He wanted to gain mass!

25. What chemical element hates being a follower? Answer: Lead!

26. How did Ben Franklin feel after the discovery of electricity? Answer: In shock!

27. I’m full of holes, but I can still hold water. What am I? Answer: Sponge!

28. Why did the atom go to the doctor? Answer: He felt very unstable.

29. Why did the biologist take his microscope to the party? Answer: To take a “cell selfie”!

Quick Tip: Combine these funny science riddles with funny science jokes and puns!

30. What do you get if you cross a dentist and a computer? Answer: “byte”!

31. Which animal was the first to fly into space? Answer: The cow that jumped over the moon!

32. What does the priest like most in physics? Answer: Mass!

33. I touch your face. I am in your words. I am the absence of space and the birds love me. What am I? Answer: Air.

34. If you close your eyes to this, it will help you see far! It helps you see the planets, the moon and even a star! What is it? Answer: a telescope!

35. I am hard as a stone, but I am in the body. what am i Answer: Teeth.

36. How do we know that Saturn was married more than once? Answer: Because she has many rings!

37. Why was the math textbook sad after a heated argument? Answer: Because it could not find a common denominator!

Related: Test Your Math With These Best Math Riddles!

38. What three “R’s” help keep our planet clean? Answer: Reduce, Reuse & Recycle!

39. What is the name of a monster with a high IQ? Answer: Frank Einstein!

Difficult science riddles for students – for middle and high school

These challenging science puzzles for students are perfect for middle school and high school kids. From simple chemistry concepts to interesting biology and physics, these riddles will test students’ understanding of these subjects.

They are a fun break for kids and just perfect for morning activities. These clever high school science riddles with answers are sure to get kids interested in science, testing their out-of-the-box thinking abilities and not just their scientific acumen.

40. When is it correct to say that 100 is equal to 212? Answer: When measuring the temperature! 100 degrees Celsius = 212 degrees Fahrenheit.

41. What expands upon cooling? Answer: Water!

42. I am yellow and can be a danger in the laboratory. Most often I am used in explosives. What am I? Answer: Nitric acid.

43. What has a mouth, but cannot chew? Answer: River!

44. What did the right hemisphere say to the left hemisphere when they could not agree on anything? Answer: Let’s go our separate ways!

45. What is the only letter of the alphabet that does not appear anywhere in the periodic table of elements? Answer: The letter J!

46. ​​Which element comes from the name of the Scandinavian god? Answer: Thorium!

47. I am a ball that can be rolled, but never tossed or thrown! what am i Answer: Eyeball

48. I taste great, but I smell terrible. What am I? Answer: Language.

49. I am where the radio waves are reflected back to the surface of the Earth. where am i Answer: Ionosphere!

50. What do chemists call a benzene ring in which carbon atoms are replaced by iron atoms? Answer: Iron wheel!

51. Which planet has the shortest year? Answer: Mercury – 88 Earth days!

52. Which planet has the longest year? Answer: Neptune is about 165 Earth years!

53. When two light nuclei fuse into one, I release a lot of nuclear energy. what am i Answer: Nuclear fusion!

54. I am a hypothetical tunnel, if you will, a shortened path in space-time connecting distant regions. what am i Answer: Wormhole.

55. I may burn my mouth and irritate my eyes, but I am consumed every day. what am i Answer: Salt.

56. I am difficult to create and impossible to destroy. I can only change shape. what am i Answer: Energy.

57. Why does a hamburger have a lower energy value than a steak? Answer: Because it is in a basic state.

58. I can keep the pool clean, but I can also poison you. what am i Answer: Chlorine!

59. I am under your face and out of your mind. what am i Answer: Your skull

60. Why was the physics textbook so difficult? Because it had mass appeal.

61. I am the oldest form of igneous rock. I make up most of the earth’s crust. And I am one of the hardest materials in the world. What breed is this? Answer: granite

62. I can be useful, but I can also be harmful. You will find me wherever you go. what am i Answer: bacteria.

63. Which two elements of the periodic table have a liquid state? Answer: mercury and bromine!

Quick Tip: Combine these science riddles with fun riddles for kids to get them thinking!

64. At night we appear uninvited, and by day we are lost without being stolen. Who are we? Answer: Stars

65. I am a unit of chemical elements, but I can never be trusted. what am i Answer: Atom!

66. I am the universe’s equivalent of a one-way street. what am i Answer: Black hole!

67. How much is a month? Answer: $1 because it has 4 quarters.

68. What freezes after heating? Answer: Computer.

69. I cannot be seen and I am measured on the Beaufort scale. I keep the kite in the air and help the ships sail. what am i Answer: Wind.

70. Which is faster — hot or cold? Answer: It’s hot, because you can catch a cold!

71. What is the most boring of all the elements of the periodic table? Answer: Bor!

Funny science riddles for adults

Meet science riddles with answers for adults! Fear not, these fun riddles aren’t just for science geeks, and anyone with a basic knowledge of science can solve them.

These science puzzles for adults are a fun way to bond with your older kids while quietly teaching them about science.

72. Why is an atom never late? Answer: He always has a nuclear clock!

73. Why do computer programmers not like nature? Answer: It has too many bugs!

74. How many theoretical physicists specializing in general relativity does it take to change a light bulb? Answer: Two – one to hold the light bulb and one to spin the universe!

75. Your mom and dad each gave you 23 of those stringy locks, and they helped make you who you are. What is it? Answer: Chromosomes!

76. What two elements of the periodic table, when combined, heal? Answer: Helium and aluminum (He + Al)

77. What chemical element do pyromaniacs like the most? Answer: Arsenic!

78. You are in a room with three monkeys. One has a banana, one has a stick, and one has nothing. Which primate in the room is the smartest? Answer: You! People are also primates!

79. Why was the Mobius strip unable to enter the school? Answer: Because the school required orientation!

80. I’m the one who stays awake when you sleep. But I need to rest when you wake up. who am i Answer: Subconscious.

81. What is the loneliest of all physical concepts? Answer: Singularity!

82. I was once a massive old star, soon to be a bright cloud of gas, but now I am a powerful explosion. what am i Answer: Supernova!

83. How does a physicist fix a broken light bulb? Answer: By performing a filament analysis.

84. I make up almost 70% of the universe, but no one knows anything about me. what am i Answer: Dark energy.

85. What is the cosmonaut’s favorite key on the keyboard? Answer: Space!

86. How to make a physicist laugh? Answer: Tell him a joke with a low threshold of understanding!

87. What can kill with just a few drops, but is always by your side? Answer: Oxygen.

88. I am the black hole equivalent of a one-way street. what am i Answer: Event horizon.

89. What did the physicist get when he told the joke? Answer: “Positive” reaction.

90. I am the toe that every scientist would like to have, but there has never been a person who has the toe that everyone agrees is the best. Which finger is this? Answer: The Theory of Everything! Also known as TOE.

91. What breaks but never falls? Answer: Dawn.

92. Which animal lives the longest in the zoo? Answer: Turtle!

93. Brilliant as silver, denser than lead, more precious than gold, can stop a bullet if I will. What am I? Answer: Eight.

94. What is the fastest way to determine the sex of a chromosome? Answer: Pull her genes down.

95. Which element is a girl’s best friend? Answer: Carbon!

96. It hides behind where it hangs. What is it? Answer: Barometer!

97. You can’t see me, you can’t touch me, you can’t feel me – but I cook your dinner. what am i Answer: A microwave particle!

98. H, Be, F, S, Mn, Kr, In, Gd and Tl? What comes next in the sequence? Answer: Fm is a fermium! All of these elements have atomic numbers that are perfect squares!

99. What is black when you buy it, red when you use it, and gray when you throw it away? What am I? Answer: Coal

100. Where does the brain go on vacation? Answer: To the hippocampus

Easy science puzzles with answers

Here comes the best of science and puzzles – Science Puzzles! Witty and tricky, these science puzzles are great fun and everyone’s favorite.

These simple science riddles with answers that will interest everyone, from school children to adults, promise the best combination of education and fun!

101. You can hear me, but you can’t see me! I do not speak until I am spoken to. who am i Answer: Echo!

102. What number do nickel and neon form when they are combined? Answer: Nine (Ni+Ne)!

103. I am a Roman god, a planet, and I can measure heat. who am i Answer: Mercury!

104. I am a little boy who lives in the ocean. I am looking for a new home when I outgrow my current one. who am i Answer: Hermit snail!

105. I can eat a lot of iron without getting sick. who am i Answer: Rust!

106. I can be found in the mantle of the Earth, I am rich in silicates and buoyant,

Although I am not exactly a mineral, I am extremely important.

I flow in slow motion, I’m a geological dream

What am I, under the surface of the Earth, as it may seem?

Answer: Magma.

107. What has a lid but is not a coffee cup?

It has an outlet but no plug.

Answer: Eye

108. I crawl on the ground without legs.

My segmented body is a sight to behold, don’t you want to know?

I make my way in the gardens and on the ground.

A small creature, day and night.

What am I?

Answer: Worm.

109. I am a phenomenon that occurs at a speed close to the speed of light.

Time slows down inside me. It is truly an impressive sight!

Predicted by Albert, I am a space adventure.

And I am still found in the depths of the universe?

What am I?

Answer: Time dilation.

110. Always old, but sometimes new.

Never sad, but sometimes melancholy.

Never empty, but sometimes full.

Never pushes, but always pulls.

What am I?

Answer: The moon

111. I produce ashes, but I am not a fire,

I can throw rocks a long distance, but I’m no slingshot

I have a crater but I’m not the moon

I throw up, but I’m not a person with a bad temper. who am i

Answer: Vulcan!

112. Voiceless, he cries, wingless, he flutters!

Toothless, he bites, mouthless, he mumbles!

What is it?

Answer: Wind!

113. I smell like rotten eggs,

But I serve a purpose.

I am used in industry,

But my smell makes some people nervous.

What am I?

Answer: Brimstone!

114. You need to think

If you want to be smart

If you want your blood to circulate

Do you need to use your…?

Answer: Heart!

115. I am both a particle and a wave, this is true,

In the quantum world, I can surprise you.

I am at the heart of Heisenberg’s uncertainty principle.

What am I on this quantum journey?

Answer: Light

116. 80 is my atomic number

And my symbol is Hg

I am the planet closest to the Sun

who am i

Answer: Mercury!

117. I am green and leafy, tall and faithful.

In the sun I photosynthesize, that’s what I love to do!

I produce oxygen, a breath of fresh air.

Can you tell who I am if you dare?

Answer: A plant!

118. When liquid is splashed on me, it does not seep.

When I’m shaken hard, I spill the liquid.

When I get hit, I change color.

And I have a whole range of colors.

What I cover is very complex and I bend very easily.

What am I?

Answer: Skin!

119. I am an elementary particle, so small and so neat.

In the Standard Model, I occupy a prominent place.

With six of my types in generations,

Who am I in the world of elite particles?

Answer: Quark.

120. I may not be gold, but I make gold more beautiful.

I help you fly, and even though I’m not popular, my prices are high. what am i

Answer: Rhodium.

121. I am increasing with every second, growing faster and faster.

But still more than 70% of me is emptiness. what am i

Answer: The universe.

122. I am necessary for life, but I can also be a threat.

With 23 pairs in you, I determine what you do.

My structure is a double helix; my code is genes.

What am I?

Answer: DNA.

123. Born in the ocean and white as snow.

When I hit the water, I disappear without a trace.

what am i

Answer: Salt!

124. Of all the glands, I am known as the main one, because I command the other endocrine glands and tell them what to do. But even though I’m a little overbearing, you need me for many things, like releasing the hormones needed for bone and muscle growth. What am I? Answer: Pituitary gland.

125. When Sheldon was 10 years old, he hammered a nail into his favorite tree to mark his height. Five years later, he returned to the tree to see how much higher the nail had risen. How much higher would the nail go if the tree grew five inches each year?

Answer: The nail would be at the same height as trees grow from the top.

126. Tim was going to wash his socks because they had gotten dirty the day before. When he poured bleach into the washing machine, some of the liquid spilled onto the floor. He took the cleaner and wiped her with a rag. Within minutes, Tim died. Why?

Answer: When bleach and ammonia (found in most detergents) mix, they release a deadly gas that can kill!

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Source: 126 Best Science Riddles for Kids and Adults With Answers & Free Printables