30 Best Science Riddles for Kids | Riddles | Startup Up


science riddles

If you have science lovers in your home, then they are going to love these science riddles to try and solve! These best science riddles will be a fun thing for your kids all summer long (and throughout the year).

I have put together a collection of 30 science riddles for kids and adults who need a challenge. Compete with your family and try to guess an answer!

20 Animal Riddles

50 Easy Riddle for Kids

20 Math Riddles

50 Tricky Riddles

10 Tricky Math Riddles

20 Funny Riddles

1. When the son of the water returns to the parent, it dies. What is it ?
Answer : Ice

2. what is a Christian priest's favorite part of physics ?
Answer : Mass

3. What did the fox scientist name his laboratory ?
Answer : Den-sity

4. What is the most uninteresting of all the periodic elements ?
Answer : Boron

5. What is neither water nor land, and is always soaking wet ?
Answer : Wetlands

6. I am a god, a planet and I can measure heat. What am I ? 
Answer : Mercury

7. You mom and dad each gave you 23 of these threadlike strands and they helped to make you who you are today ?
Answer : Chromosomes

8. What are the three R's that keep our planet clean ?
Answer : The three R's are reduce, reuse and recycle

9. What two periodic elements, when combined, heal ? 
Answer : Helium and Aluminum  (HE+AL)

10. What kind of animal lives longest in zoos ?
Answer : Turtles

11. What would you call a bird in winter ?
Answer : Brrrrd

12. Many have heard it, but nobody has ever seen it. It will not speak back until spoken to. What is it ?
Answer : An echo

13. What are the only two periodic elements to have the state of a liquid ?
Answer : Mercury and Bromine

14. Give it food and it will live; give it water and it will die. What is it ?
Answer : Fire

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

16. 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 ?
Answer : Fetus

17. What kind of chemical element hates to be a follower ?
Answer : Lead

18. I am a black hole's equivalent of a one-way street. What am I ?
Answer : The event horizon ( a boundary in which nothing can ever leave, only get pulled in)

19. What is black when you buy it, red when you use it and gray when you throw it away /
Answer : Charcoal

20. What is the loneliest of all physics concepts ?
Answer : The singularity

21. What four periodic elements, when combined, make up something that terrifies criminals /
Answer : Carbon, Oxygen, Phosphorus and Sulfur (C+O+P+S)

22. What element is derived from a Norse god ?
Answer : Thorium

23. What period of time has the least weight ?
Answer : a light year

24. What can eat a lot of iron without getting sick ?
Answer : Rust

25. What are ten things you can always count on ?
Answer : Your fingers

26. I am under your face and outside your mind. What am I ?
Answer : Your skull

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

28. Which reindeer loves to go to outer space ?
Answer : Comet

29. What planet has the shortest year ?
Answer : Mercury

30. What do you do with a dead chemist ?
Answer : Barium

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