70 Best Science Riddles for Kids and Adults (With Answers)

What is your kid’s favorite subject? Is it anything close to science?

If your answer is “yes,” let me ask you, are you looking for ways to make your kid have a great time working their brain?

Well, I have the right plan for you!

Try asking them the best science riddles available. Riddles are great for those times when you don’t want your kid to get directly involved in studying but still work their mind and learn something.

I liked solving riddles in my school days, and I still do. But, of course, I am not a pro. Certain riddles make me think a lot, and even after that, I come up with wrong answers!

I have listed here some of the best riddles on science. And the best part?

There is something for all age groups – be it your kid or you. So, all you need is to scroll down and see if you can solve them.

Now, how good were you at science in your school days? How good is your kid in science?

Do you want to give a test?

Try these amazing science riddles for both kids and adults. These are the best you can get and are perfect for keeping your brain working.

Best Science Riddles for Kids and Adults

Best Science Riddles for Kids and Adults

Science is the favorite of many kids and adults. Are you or your kid one of them?

Then you are going to enjoy these science riddles for sure.

When I was in school, I used to like science subjects, but I dreaded math. And that is the reason I chose to stick to the subject of the arts when it came to higher studies.

But you don’t have to be like me. In fact, the more you are not like me, the better!

So, your kid likes science, and you want them to polish their science knowledge. Right?

Then the best you can do is ask them interesting riddles on science. This will make them think and be better at solving scientific issues.

Now, are you planning a meetup with your favorite people and wondering what games you can play to make the occasion all the more fun?

How about science riddles?

Some of these riddles are easy, and some are difficult. Depending on their level of difficulty, you can choose which one to ask whom.

So, what are you waiting for?

Let’s get started with some exciting science riddles!

Best Science Riddles for Kids

Best Science Riddles for Kids

Do you want your kids to not make a mess at home by trying out some science experiments?

Ask them science riddles.

Yes, they will miss the excitement of doing experiments. But at the same time, they can at least keep their minds busy thinking about science. And science riddles are no less fun than doing practicals.

They make your kids curious and think about what the answer could be. And for that, they think in different ways so that they can come to a solution.

This allows your kids to enhance their problem-solving skills and become better at lateral learning.

And did I tell you science riddles are great for those kids who are not very interested in science?


Well, riddles make them develop an interest in scientific theories and experiments. They become more curious to know the answers. And they do all these without knowing that they are actually getting involved in science.

Isn’t that awesome?

I have dedicated this section to science riddles that are meant for your kids.

So, are you ready to ask funny puzzles to your kids?

Keep reading!

What are the three R’s that keep our planet clean?

The three R’s are Reduce, Reuse and Recycle.

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

They both weigh the same (a ton).

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


What can go up and come down without moving?

The temperature

What has a foot on each side and one in the middle?

A yardstick

What grows only upwards and can never come down?

Our height

I am excellent to taste but horrible to smell. What am I?

A tongue

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


What breaks but never falls?


What falls but never breaks?


What has a mouth but cannot chew?

A river

What goes around and around the wood but never goes into the wood?

The bark of a tree

What kind of rocks are on the bottom of the Mississippi River?

Wet rocks

What is the moon worth?

$1, because it has 4 quarters

What do the numbers 11, 69, and 88 all have in common?

They read the same right side up and upside down.

What is the center of gravity?

The letter V

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


How can you tell a tree is a dogwood tree?

By its bark

What is a tornado’s favorite game to play?


What runs faster, cold or hot?

Hot, because you can catch a cold.

Why did the scientist take out his doorbell?

He wanted to win the no-bell prize.

What was the first animal to go into space?

The cow that jumped over the moon

How did Ben Franklin feel after discovering electricity?


What did one earthquake say to the other?

“It’s not my fault!”

What kind of tree can fit into your hand?

A palm tree

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


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

The temperature

What is full of holes but still holds water?

A sponge.

What period of time weighs the least?

A light-year

I am the hottest body in the solar system and keep everyone warm. Who am I?

The Sun

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

An atom makes up everything.

What can eat a lot of iron without getting sick?


You are in a room with 3 monkeys. One has a banana, one has a stick, and one has nothing. Which primate in the room is the smartest?

You are, because you are a primate, too.

Why was the science teacher angry?

He was a mad scientist.

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

because she has a lot of rings!

How did the astronaut serve dinner in outer space?

On flying saucers

What is neither water nor land and is always soaking wet?


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

An X-ray

What did the limestone say to the geologist?

“Don’t take me for granite!”

Did you hear the one about a chemist who was reading a book about helium?

He couldn’t put it down

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


What do you do with a dead chemist’s corpse?

You just Barium.

What kind of chemical element hates to be a follower?


I am a gas that is helpful to plants, but I cannot be bought at a gas station. What am I?

Carbon dioxide

What would the chemical composition be if bananas had a chemical formula?


They arrive at night without being fetched and disappear during the day without being taken. What are they?


Although I am as solid as a rock when heated, I melt easily. So who am I?

A cube of ice.

I enjoy traveling, but I never leave home. You would break your back if you carried as much as I do. So who am I?

The snail.

I can be rolled like a ball but can’t be thrown or bounced. So who am I?


Best Science Riddles for Adults

Best Science Riddles for Adults

Do you miss your science classes? Do you wish to relive those fun memories of your science experiments with your friends or colleagues?

Play the game of science riddles!

Yes. As you already know, riddles are super-engaging and fun. And they can keep you occupied for hours. And the best part?

You get to relive those childhood science classes by answering funny puzzles about science.

What more do you want?

In this section, I have listed some funny yet thought-provoking science riddles that are fun to answer.

As these riddles are meant for adults, you may find some of them to be difficult. But, you know, you can never underestimate the excitement of finding answers to riddles – no matter how hard they are.

So, without further ado, let’s get started with the best science riddles for adults!

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 sexual development and promoting bone and muscle growth.

Pituitary gland

Your mom and dad each gave you 23 of these threadlike strands, and they helped to make you who you are.


What two periodic elements, when combined, heal?

Helium and Aluminum (HE + AL)

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

Nuclear fusion

What is the most uninteresting of all the periodic elements?


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?


What are the only two periodic elements to have the state of a liquid?

Mercury and Bromine

I make up about three-fourths of all the universe, and almost nothing is known about me. What am I?

Dark energy

I am a hypothetical tunnel, a shortcut if you will, of space-time that connects faraway regions. I am a what?

A wormhole

What did the scientist say when he found 2 atoms of helium?

“He, he!”

I was once called an embryo, but I have now gone through more than eight weeks of development, so my name is now changed to what?

A fetus

What kind of chemical element hates to be a follower?


I am a black hole’s equivalent of a one-way street. What am I?

The event horizon (a boundary in which nothing can ever leave, only get pulled in)

What is black when you buy it, red when you use it, and gray when you throw it away?


What is the loneliest of all physics concepts?

The singularity

What four periodic elements, when combined, make up something that terrifies criminals?

Carbon, Oxygen, Phosphorous, and Sulfur (C + O + P + S)

What element is derived from a Norse god?


I am the toe that every scientist would love to have as their own, yet there has never been a single person who has had a toe that everyone agreed is the best. What kind of toe am I?

Theory of everything (also called a TOE in the scientific community)

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

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

What number do Nickel and Neon make when combined?

Nine (NI + NE)

You cannot see me, I cannot be touched, you cannot feel me, but I can cook your lunch.

A microwave particle

I make up about three-fourths of all the universe, and almost nothing is known about me. What am I?

Dark energy

What scientist is the least interesting to listen to?

Niels Bohr

I know you may like to eat sugar, but when you eat too much of it, and your blood sugar levels rise, then my good friend Pancreas releases me into the bloodstream to restore blood sugar levels to their norm. What am I?


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?


I come as a gas, and I get in line with neon. I am also known as the home of a very super person. What am I?


I may hurt your eye and burn your mouth, but since you always consume me, what am I?


What will you call a new version of the old movie Tron?


Although I have a unique quality, you might find two of me in your everyday drink. So who am I?


I am outside of your brain and inside your face. So who am I?

Your skull.

I cannot be seen, but many people have heard about me. If not spoken to, I won’t respond. Who am I?

An echo.

I’m present in all dairy products, and I’m necessary for strong bones and teeth. So who am I?


Being as white as snow and developed in the ocean. I vanish into thin air when I fall back into the water. So who am I?



How did you and your kids perform? Did you find the best science riddles for kids and adults difficult to answer, or were they easy?

Do you want me to add more riddles to this list?

Let me know in the comments!

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