Lighter than what I am made of
Lighter than what I am made of. More of me is hidden than seen.
✨ I'm an Iceberg
L2 · what am i
🔮 Science 🛡️ Kid-Safe ✨ With Answers
Science Riddles for Kids
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
Page 2 of 3
Mary was working in a chemistry lab with a mixture of chemicals that was 90% water and weighed 20 po
Mary was working in a chemistry lab with a mixture of chemicals that was 90% water and weighed 20 pounds. After returning to the lab from a weekend break, she calculated the mixture was now 50% water. How much does the mixture now weigh? For purposes of this puzzle, assume the non-water part of the mixture was not affected by evaporation.
Hint: Mary was working in a chemistry lab with a mixture of chemicals that was 90% wat…
✨ 12 Pounds
L3 · math
My thunder comes before the lightning; My lightning comes before the clouds; My rain dries all the l
My thunder comes before the lightning; My lightning comes before the clouds; My rain dries all the land it touches. What am I?
Hint: My thunder comes before the lightning; My lightning comes before the clouds; My …
✨ A volcano
L2 · what am i
Never resting, never still
Never resting, never still. Moving silently from hill to hill. It does not walk, run or trot, All is cool where it is not. What is it?
Hint: Never resting…
✨ Sunshine
L2 · what am i
On a fine sunny day a ship was in the harbor
On a fine sunny day a ship was in the harbor. All of a sudden the ship began to sink. There was no storm and nothing wrong with the ship yet it sank right in front of the spectators eyes. What caused the ship to sink?
Hint: On a fine sunny day a ship was in the harbor…
✨ It was a Submarine
L2 · logic
Peter celebrated his birthday on one day, and two days later his older twin brother, Paul, celebrate
Peter celebrated his birthday on one day, and two days later his older twin brother, Paul, celebrated his birthday. How could this be?
Hint: Peter celebrated his birthday on one day…
✨ When the mother of the twins went into labor, she was travelling by boat
L3 · logic
Shortly after jumping from an aircraft at 5000 or so feet, a man deploys his parachute
Shortly after jumping from an aircraft at 5000 or so feet, a man deploys his parachute. When he looks up he sees a rather large hole in his parachute. Nonetheless he lands safely without assistance and without using his reserve chute. Why did he survive?
Hint: Shortly after jumping from an aircraft at 5000 or so feet…
✨ Most parachutes need a hole in them to let the air pass through. Otherwise the parachute would swing wildly side to side
L2 · brain teaser
The higher I climb, the hotter I engage, I can not escape my crystal cage
The higher I climb, the hotter I engage, I can not escape my crystal cage. What am I?
Hint: The higher I climb…
✨ Mercury in a thermometer
L2 · what am i
The king dies and two men, the true heir and an impostor, both claim to be his long-lost son
The king dies and two men, the true heir and an impostor, both claim to be his long-lost son. Both fit the description of the rightful heir: about the right age, height, coloring and general appearance. Finally, one of the elders proposes a test to identify the true heir. One man agrees to the test while the other flatly re-fuses. The one who agreed is immediately sent on his way, and the one who re-fused is correctly identified as the rightful heir. Can you figure out why?
Hint: The king dies and two men…
✨ The test was a blood test. The elder remembered that the true prince was a hemophiliac
L3 · logic
The priest in my hometown told us that on a particular day he would walk on water for 30 minutes
The priest in my hometown told us that on a particular day he would walk on water for 30 minutes. The lake was not dry and we all observed the priest actually walking on water. How?
Hint: The priest in my hometown told us that on a particular day he would walk on wate…
✨ It was winter and the lake was frozen
L2 · logic
The rungs of a 10 foot ladder attached to a ship are 1 foot apart
The rungs of a 10 foot ladder attached to a ship are 1 foot apart. If the water is rising at the rate of one foot an hour, how long will it take until the water covers over the ladder?
Hint: The rungs of a 10 foot ladder attached to a ship are 1 foot apart…
✨ It will never cover the ladder because as the water rises, so will the floating ship
L2 · logic
There are four brothers in this world that were all born together
There are four brothers in this world that were all born together. The first runs and never wearies. The second eats and is never full. The third drinks and is always thirsty. The fourth sings a song that is never good.
Hint: There are four brothers in this world that were all born together…
✨ Water, Fire, Earth, and Wind
L2 · what am i
There lived a man in a house and everytime he went to bed he turned on the light
There lived a man in a house and everytime he went to bed he turned on the light. One night, the man forgot to turn on the light. The next day he read the paper and killed himself. Why?
Hint: There lived a man in a house and everytime he went to bed he turned on the light…
✨ The man lived in a lighthouse. He forgot to turn on the light and a ship crashed. The next morning he read in the paper that the ship crashed and killed himself because he felt guilty
L3 · logic
What can go up and come down without moving?
What can go up and come down without moving?
✨ The temperature
L3 · brain teaser
What can you catch but not throw?
What can you catch but not throw?
✨ A cold
L2 · joke
What goes through the door without pinching itself?
What goes through the door without pinching itself? What sits on the stove without burning itself? What sits on the table and is not ashamed?
Hint: What goes through the door without pinching itself…
✨ The Sun
L3 · brain teaser
What is the easiest way to throw a ball, and have it stop, and completely reverse direction after tr
What is the easiest way to throw a ball, and have it stop, and completely reverse direction after traveling a short distance?
Hint: What is the easiest way to throw a ball…
✨ Toss it in the air
L2 · brain teaser
What was the biggest island in the world before the discovery of Australia by Captain Cook?
What was the biggest island in the world before the discovery of Australia by Captain Cook?
Hint: What was the biggest island in the world before the discovery of Australia by Ca…
✨ Australia was always the biggest island in the world, even before it was discovered
L3 · brain teaser
When I left, I didn't know where I was going; when I got there, I didn't know where I was; when I re
When I left, I didn’t know where I was going; when I got there, I didn’t know where I was; when I returned, I didn’t know where I had been. Who was I?
Hint: When I left…
✨ Christopher Columbus - when he found the Americas
L3 · brain teaser
When John was six years old he hammered a nail into his favorite tree to mark his height
When John was six years old he hammered a nail into his favorite tree to mark his height. Ten years later at age sixteen, John returned to see how much higher the nail was. If the tree grew by five centimeters each year, how much higher would the nail be?
Hint: When John was six years old he hammered a nail into his favorite tree to mark hi…
✨ The nail would be at the same height since trees grow at their tops
L3 · brain teaser