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132 Fun Science Riddles If You’re Up For A Brainteasing Challenge

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So, you’ve just decided to take a break from studying and need something to pass the time. Or maybe you’re waiting for a plane, or you’re stuck at the train station, and you want something to keep your brain occupied for the next hour or so. If you’re up for some challenging brainteasing, science riddles are the perfect combination of fun and education!

Science riddles can take riddling to a new, more intellectual level, with tricky questions that use science to stump you. They are perfect for any occasion where you need a break from your everyday routine and want to spice things up with some science brain teasers. But don’t worry if you don’t know too much about science. Most of these riddles about science are just perfect for keeping everyone entertained, whether they’re an expert in physics or not, since they test your creativity and problem-solving skills rather than your actual knowledge of science.

Here we are with the best science-themed tricky riddles (with answers) that will test your ability to think outside the box!

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#1

132 Fun Science Riddles If You’re Up For A Brainteasing Challenge What is the center of gravity?

55points

Gary Harkins 2 years ago

Not sure why you got down voted. Cheesy but harmless

6points

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#2

If bananas were to have a chemical formula, what would it be?

43points

Hubert Martin 2 years ago

Haha good one

1point

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#3

What can eat a lot of iron without getting sick?

38points

Robert T 2 years ago

There is a town called Rust in Germany. It's where old cars from the 70's go to die. Rust in peace, man!

12points

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#4

132 Fun Science Riddles If You’re Up For A Brainteasing Challenge What did the scientist say when he found 2 atoms of helium?

38points

Zero 2 years ago

Different version: what element gets funnier the more there are?

11points

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#5

What number do Nickel and Neon make when they’re combined?

27points

Divik Kochhar 1 year ago

9

0points

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#6

I can burn your mouth and sting your eye, but I am consumed everyday what am I?

26points

Hassan Farooqi 2 years ago

Chillies

2points

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#7

132 Fun Science Riddles If You’re Up For A Brainteasing Challenge What would you call a re-make of the classic film Tron?

24points

Ejaz Mir 2 years ago

😲😲😲

1point

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#8

You will find me in Mercury, Earth, Mars and Jupiter, but not in Venus or Neptune. What am I?

23points

Ejaz Mir 2 years ago

True

1point

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#9

You can’t see me, but I can see you. To be more specific, I see through. What am I?

23points

Eligijus Sinkunas 1 year ago

Answer: An X-ray.

0points

#10

132 Fun Science Riddles If You’re Up For A Brainteasing Challenge How did Ben Franklin feel after discovering electricity?

20points

Ejaz Mir 2 years ago

enlightened 😅😅

5points

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#11

What can be measured, but has no length, width, or height?

18points

Brandon Walker 2 years ago

Sound, light, humidity, so many things

13points

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#12

Each of your parents gave you twenty-three threadlike strands that made you who you are today. What are they?

16points

Ejaz Mir 2 years ago

In fact they transfered me what they got from their parents 😅😅😅

1point

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#13

132 Fun Science Riddles If You’re Up For A Brainteasing Challenge What is black when you get it, red when you use it, and grey when you are finished with it?

15points

A Miller 2 years ago

What if you only put it in someone's stocking?

4points

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#14

At night they come without being fetched, and by day they are lost without being stolen.

15points

Eligijus Sinkunas 1 year ago

Answer: Stars.

0points

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#15

I am a unit of chemical elements, but I can never be trusted. What am I?

14points

Eligijus Sinkunas 1 year ago

Answer: An atom, they make up everything.

0points

#16

132 Fun Science Riddles If You’re Up For A Brainteasing Challenge I am as hard as a rock, but when you heat me up I melt. What am I?

14points

Vic 2 years ago

So do most solids, given the right temperature..

14points

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#17

H, Be, F, S, Mn, Kr, In, Gd, and Tl? What’s the next in the sequence?

13points

Eligijus Sinkunas 1 year ago

Answer: Fm. These are the chemical elements whose atomic numbers are perfect squares.

0points

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#18

You are in a room with two metal rods and no other metal. One of them is magnetized and the other is not. How can you determine which one is magnetized and which is not?

12points

Wilko Pebesma 2 years ago

Only if they are very light rods.

2points

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#19

132 Fun Science Riddles If You’re Up For A Brainteasing Challenge What four periodic elements, when combined, make up something that terrifies criminals?

12points

Eligijus Sinkunas 1 year ago

Answer: Carbon, Oxygen, Phosphorous & Sulfur (C + O + P + S).

0points

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#20

I'm unique in one way but you can find two of me in your daily drink. What am I?

12points

Robert T 2 years ago

But you're not unique. I read you before!

4points

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#21

I am under your face and outside your mind. What am I?

11points

Eligijus Sinkunas 1 year ago

Answer: Your skull.

0points

#22

132 Fun Science Riddles If You’re Up For A Brainteasing Challenge I am a black hole’s equivalent of a one-way street. What am I?

11points

Eat Dirt Crow 2 years ago

Not a perfect analogy. You can still, technically, go the wrong way down a one way street. Once you pass the event horizon, however, there's no going back.

5points

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#23

I have been around for millions of years but am only a month old. What am I?

11points

Eligijus Sinkunas 1 year ago

Answer: The moon.

0points

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#24

What breaks but never falls?

9points

Eligijus Sinkunas 1 year ago

Answer: Dawn.

0points

#25

132 Fun Science Riddles If You’re Up For A Brainteasing Challenge What do the numbers 11, 69, and 88 all have in common?

9points

Eligijus Sinkunas 1 year ago

Answer: They read the same right side up and upside down.

0points

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#26

I love to roam, but I always stay home. If you carried what I carried, you’d end up breaking your back! What am I?

9points

Eligijus Sinkunas 1 year ago

Answer: A snail.

0points

#27

Lots of people have heard it, but no one has seen it. It will not speak back unless spoken to. What is it?

9points

Eligijus Sinkunas 1 year ago

Answer: An echo.

0points

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#28

132 Fun Science Riddles If You’re Up For A Brainteasing Challenge I come as a gas, and I’m in line with Neon. I’m also the home of a very Super man. What am I?

9points

Eligijus Sinkunas 1 year ago

Answer: Krypton.

0points

#29

What chemical element doesn’t like to follow?

9points

Eligijus Sinkunas 1 year ago

Answer: Lead.

0points

#30

What do chemists call a benzene ring with iron atoms replacing the carbon atoms?

9points

Eligijus Sinkunas 1 year ago

Answer: A ferrous wheel.

0points

#31

132 Fun Science Riddles If You’re Up For A Brainteasing Challenge I am said to be only one dimension, and as small as can be, some say I am the foundation of all that you see. What am I?

9points

Eligijus Sinkunas 1 year ago

Answer: A string.

0points

#32

I am a ball that can be rolled, but never bounced or thrown. What am I?

9points

It's Izzy 🇺🇦 (They/Them) 2 years ago

I mean, if you try hard enough...

13points

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#33

I'm sometimes full, but I never overflow. What Am I?

9points

Eligijus Sinkunas 1 year ago

Answer: The Moon.

0points

#34

132 Fun Science Riddles If You’re Up For A Brainteasing Challenge Kids really love me because I make things float. You can even use me to expand small things. What am I?

9points

Eligijus Sinkunas 1 year ago

Answer: Helium.

0points

#35

Which weighs more, a ton of concrete or a ton of feathers?

8points

Eligijus Sinkunas 1 year ago

Answer: They both weigh the same.

0points

#36

I can rush, be still, be hot, be cold, and be hard. I can slip through almost anything. What am I?

8points

Eligijus Sinkunas 1 year ago

Answer: Water.

0points

#37

132 Fun Science Riddles If You’re Up For A Brainteasing Challenge What can go up and come down without moving?

8points

Eligijus Sinkunas 1 year ago

Answer: The temperature.

0points

#38

How do we know that Saturn was married more than once?

8points

Eligijus Sinkunas 1 year ago

Answer: Because she has a lot of rings!

0points

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#39

Shiny like a silver, denser than lead, pricier than gold, could stop a bullet, if I wanted to. What am I?

8points

Eligijus Sinkunas 1 year ago

Answer: Osmium.

0points

#40

132 Fun Science Riddles If You’re Up For A Brainteasing Challenge What kind of rocks are on the bottom of the Mississippi River?

7points

Eligijus Sinkunas 1 year ago

Answer: Wet rocks.

0points

#41

What was the first animal to go into space?

7points

Eligijus Sinkunas 1 year ago

Answer: The cow that jumped over the Moon.

0points

#42

What period of time weighs the least?

7points

Wade Johnston 2 years ago

A light year isn't a period of time, it's a unit of distance.

1point

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#43

132 Fun Science Riddles If You’re Up For A Brainteasing Challenge I am needed for flight but cannot fly on my own. What am I?

7points

Gaming Elementalist 2 years ago

Planes fly without feathers, but need wings. Hot air balloons fly without either, but need air. They all need air, but air flies on its own. In short, this is stupid.

9points

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#44

I am a god, I am a planet, and I can measure the temperature. What am I?

7points

Eligijus Sinkunas 1 year ago

Answer: Mercury.

0points

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#45

Which concept in physics is the loneliest?

7points

Eligijus Sinkunas 1 year ago

Answer: The singularity.

0points

#46

132 Fun Science Riddles If You’re Up For A Brainteasing Challenge I am the equivalent of a one-way street in the universe. What am I?

7points

Jadin Hanson 2 years ago

A repeat

1point

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#47

What is a priest’s favorite thing about physics?

7points

Eligijus Sinkunas 1 year ago

Answer: Mass!

0points

#48

I’m an individual on my own - but you can find two of me in your daily drink. What am I?

7points

Eligijus Sinkunas 1 year ago

Answer: Hydrogen.

0points

#49

132 Fun Science Riddles If You’re Up For A Brainteasing Challenge I’m essential for healthy bones and teeth, and you can find me in every dairy product. What am I?

7points

Eligijus Sinkunas 1 year ago

Answer: Calcium.

0points

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#50

I am your local weatherperson. I track storms and use weather satellites to provide you with an accurate forecast. What career did I choose?

7points

Robert T 2 years ago

I misread that as "I am your local Wetherspoons" LOL

1point

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#51

I am the part of your body that controls all your decisions. I need to be nurtured and stimulated, but I will help you learn. What am I?

7points

Eligijus Sinkunas 1 year ago

Answer: Brain.

0points

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#52

132 Fun Science Riddles If You’re Up For A Brainteasing Challenge What is the fastest way to determine the gender of a chromosome?

7points

Eligijus Sinkunas 1 year ago

Answer: Pull down its genes.

0points

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#53

Born in the ocean and white as snow. When I fall back to water I disappear without a trace. What am I?

7points

Jadin Hanson 2 years ago

Clouds are such a better answer.

1point

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#54

What is stomach's way of letting you know you've neglected it?

7points

Eligijus Sinkunas 1 year ago

Answer: Grumble.

0points

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#55

132 Fun Science Riddles If You’re Up For A Brainteasing Challenge I may not be gold but I make gold look more beautiful. I help you fly and even though I'm not popular, my prices run high. What am I?

7points

Eligijus Sinkunas 1 year ago

Answer: Rhodium.

0points

#56

I'm in your kitchen pantry, waiting for you to wrap me over something. What am I?

7points

Eligijus Sinkunas 1 year ago

Answer: Aluminum.

0points

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#57

You can get me for free, but inside an atom, I add a lot of weight. What am I?

7points

Eligijus Sinkunas 1 year ago

Answer: Neutron, because it has no charge.

0points

#58

132 Fun Science Riddles If You’re Up For A Brainteasing Challenge I cannot live, but I make life possible. When I sit with others, I prefer the upper left of the table. I am light and can combine with others of my kind to be bright. I only own one thing, no one knows exactly where it is. I am one to share, but not with those that are the heaviest. What am I?

ImRedditingOnMyPhonr Report

7points

Eligijus Sinkunas 1 year ago

Answer: Hydrogen.

0points

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#59

I touch your face. I am in your words. I am a lack of space and beloved by birds. What am I?

6points

Eligijus Sinkunas 1 year ago

Answer: Air.

0points

#60

What falls but never breaks?

6points

Eligijus Sinkunas 1 year ago

Answer: Dusk.

0points

#61

132 Fun Science Riddles If You’re Up For A Brainteasing Challenge What is the moon worth?

6points

Eligijus Sinkunas 1 year ago

Answer: $1, because it has 4 quarters.

0points

#62

Give it food and it will live; give it water and it will die. What is it?

6points

Eligijus Sinkunas 1 year ago

Answer: Fire.

0points

#63

When the son of the water returns to the parent, it dies. What is it?

6points

Eligijus Sinkunas 1 year ago

Answer: Ice.

0points

#64

132 Fun Science Riddles If You’re Up For A Brainteasing Challenge How did the astronaut serve dinner in outer space?

6points

Eligijus Sinkunas 1 year ago

Answer: On flying saucers.

0points

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#65

I am a gas that is essential for plants - but I can’t be bought at the gas station. What am I?

6points

Eligijus Sinkunas 1 year ago

Answer: Carbon dioxide.

0points

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#66

What are 10 things that you can always count on?

6points

Iris 2 years ago

Except for people who don't have 10 fingers

1point

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#67

132 Fun Science Riddles If You’re Up For A Brainteasing Challenge I am hard as a stone but you can find me on your body. What am I?

6points

Eligijus Sinkunas 1 year ago

Answer: Teeth.

0points

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#68

I can be good for you, but I can also be bad for you, and you will find me wherever you go. What am I?

6points

Eligijus Sinkunas 1 year ago

Answer: Bacteria.

0points

#69

It is very hard to create me, but I can’t be destroyed - I can only change form. What am I?

6points

Eligijus Sinkunas 1 year ago

Answer: Energy.

0points

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#70

132 Fun Science Riddles If You’re Up For A Brainteasing Challenge I make up almost ¾ of the universe, but no one knows anything about me. What am I?

6points

Eligijus Sinkunas 1 year ago

Answer: Dark energy.

0points

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#71

Which two elements heal?

6points

Eligijus Sinkunas 1 year ago

Answer: Helium and Aluminium (He + Al).

0points

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#72

What happened when the chemist read the book about helium?

6points

Eligijus Sinkunas 1 year ago

Answer: He couldn’t put it down.

0points

#73

132 Fun Science Riddles If You’re Up For A Brainteasing Challenge Which element is the most boring one?

6points

Eligijus Sinkunas 1 year ago

Answer: Boron.

0points

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#74

Which element is derived from a Norse god and a Marvel hero?

6points

Eligijus Sinkunas 1 year ago

Answer: Thorium.

0points

#75

I am bigger than a daim but worthless. What am I?

6points

Eligijus Sinkunas 1 year ago

Answer: A nickel.

0points

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#76

132 Fun Science Riddles If You’re Up For A Brainteasing Challenge What element is a girl’s future best friend?

6points

Eligijus Sinkunas 1 year ago

Answer: Carbon.

0points

#77

I am the least interesting scientist to listen to? Who am I?

6points

Jadin Hanson 2 years ago

No, it's you.

1point

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#78

Without me as a part of your brain, you would lose your posture and balance, and be unable to coordinate muscle movements. I always hang out near my good friend the brainstem. What am I?

6points

Eligijus Sinkunas 1 year ago

Answer: Cerebellum.

0points

#79

132 Fun Science Riddles If You’re Up For A Brainteasing Challenge What are the only two periodic elements to have a liquid state?

6points

Eligijus Sinkunas 1 year ago

Answer: Bromine and Mercury.

0points

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#80

I am a hypothetical tunnel, a short cut if you will, of space-time which connects far away regions. I am a what?

6points

Eligijus Sinkunas 1 year ago

Answer: Wormhole.

0points

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#81

What planet has the shortest year?

6points

Eligijus Sinkunas 1 year ago

Answer: Mercury, as it is closest to the Sun.

0points

#82

132 Fun Science Riddles If You’re Up For A Brainteasing Challenge Behind where it hangs it hides. What is it?

6points

Eligijus Sinkunas 1 year ago

Answer: A Barometer.

0points

#83

Electrically charged particles called ions are found here. Who am I?

6points

A Miller 2 years ago

Trivia, not riddle

4points

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#84

I am where radio waves are bounced back to the earth's surface. Who am I?

6points

Eligijus Sinkunas 1 year ago

Answer: The Lonosphere.

0points

#85

132 Fun Science Riddles If You’re Up For A Brainteasing Challenge What can kill with only a thimbles worth; yet is around you at all times?

6points

Brian Upsher 2 years ago

With more than a thimble your survival is doubted, yet always surrounded and you'll die without it. What is it? Oxygen

1point

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#86

Of all the glands, I am known as the master because I boss around the other endocrine glands and tell them what to do. But even though I am a bit bossy, you need me for many things, such as secreting hormones required for s**ual development and promoting bone and muscle growth.

6points

Jadin Hanson 2 years ago

Pituitary Bland

1point

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#87

When two light nuclei become one, I liberate quite a bit of nuclear energy? What am I?

6points

Eligijus Sinkunas 1 year ago

Answer: Nuclear fusion.

0points

#88

132 Fun Science Riddles If You’re Up For A Brainteasing Challenge I was once an old massive star and soon I will be a brightly colored gas cloud, but for now I am a massive explosion. What am I called?

6points

Eligijus Sinkunas 1 year ago

Answer: Supernova.

0points

#89

What periodic element do pyromaniacs love the most?

6points

Jadin Hanson 2 years ago

This one is actually hot.

1point

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#90

Ronnie’s teacher told him that he and his classmates all had to dress up as a part of the body for the school’s Halloween party. The teacher also said it couldn’t be the same old thing, it had to be something new. Ronnie had the perfect idea. What costume did he come up with?

6points

Eligijus Sinkunas 1 year ago

Answer: Neuron.

0points

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#91

132 Fun Science Riddles If You’re Up For A Brainteasing Challenge I am a rock bigger than Venus but smaller than Uranus. What am I?

6points