Looking for science riddles? You've found the right page. We've collected 20 kid-safe science riddles, ranging from quick "what am I" warm-ups to head-scratching brain-teasers. Each riddle includes the answer behind a tap, so kids get a chance to guess before peeking. Great as classroom starters, lunch-box surprises, or a family game.
45 science riddles
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A cloud was my mother, the wind is my father, my son is the cool stream, and my daughter is the fruit of the land. A rainbow is my bed, the earth my final resting place, and I’m the torment of man.
Hint: A cloud was my mother…
A large truck is crossing a bridge 1 mile long. The bridge can only hold 14000 lbs, which is the exact weight of the truck. The truck makes it half way across the bridge and stops. A bird lands on the truck. Does the bridge collapse?
Hint: A large truck is crossing a bridge 1 mile long…
A magician was boasting one day at how long he could hold his breath under water. His record was 6 minutes. A kid that was listening said, “that’s nothing, I can stay under water for 10 minutes using no types of equipment or air pockets!”The magician told the kid if he could do that, he’d give him $10,000. The kid did it and won the money. Can you figure out how?
Hint: A magician was boasting one day at how long he could hold his breath under water…
A man was just doing his job when his suit was torn. Why did he die three minutes later?
Hint: A man was just doing his job when his suit was torn…
A psychologist goes to a village in Africa and decides to compare foot size to intelligence. He notes that in general, as foot size increases, so does intelligence. How can this be?
Hint: A psychologist goes to a village in Africa and decides to compare foot size to i…
A rubber ball is tossed off the top of a 90 foot building. Every time it bounces, it goes back up half way. How many bounces will the ball take before it stops?
Hint: A rubber ball is tossed off the top of a 90 foot building…
A train just leaves a station and enters a tunnel. Where is the best place for a claustrophobic person to sit?
Hint: A train just leaves a station and enters a tunnel…
An archaeologist finds a coin dated 48 B.C. How did he know it was a fake?
At dusk I come without being fetched. At dawn I disappear without being stolen. I’m a poet’s tears and a sailor’s guide. What am I ?
Hint: At dusk I come without being fetched…
Different lights do make me strange, thus into different sizes I will change. What am I?
Hint: Different lights do make me strange…
How is it that a person born in Massachusetts, whose parents were both born in Massachusetts, is not born a U.S. Citizen?
Hint: How is it that a person born in Massachusetts…
I am the black child of a white father, a wingless bird, flying even to the clouds of heaven. I give birth to tears of mourning in pupils that meet me, even though there is no cause for grief, and at once on my birth I am dissolved into air. Who am I?
Hint: I am the black child of a white father…
I am thought to be everywhere, and I only have one rival. He hides within himself, and stays wherever I cannot reach. Who am I? and Who is my rival??
Hint: I am thought to be everywhere…
I dig out tiny caves, and store gold and silver in them. I also build bridges of silver and make crowns of gold. They are the smallest you could imagine. Sooner or later everybody needs my help, yet many people are afraid to let me help them. Who am I?
Hint: I dig out tiny caves…
I have an eye but cannot see. I am stronger and faster then any man alive but have no limbs. What am I?
Hint: I have an eye but cannot see…
I’m a god, a planet, and measurer of heat. Who am I?
If a fire hydrant has H2O inside, what does it have on the outside?
If you screw a light bulb into a socket by turning the bulb toward the right with your right hand, which way would you turn the socket with your left hand in order to unscrew it while holding the bulb stationary?
Hint: If you screw a light bulb into a socket by turning the bulb toward the right wit…
Imagine you are in a room with 3 switches. In an adjacent room there are 3 bulbs (let’s say in lamps which are on a regular table), each switch belongs to one bulb. All are off at the moment. It is impossible to see from one room to another. No help from anybody else is allowed. How can you find out which switch belongs to which bulb, if you may enter the room with the bulbs only once?
Hint: Imagine you are in a room with 3 switches…
It’s been around for millions of years, but it’s no more than a month old. What is it?
Hint: It’s been around for millions of years…