50 Hard Trivia Questions for Kids

1. Which dwarf planet was called our ninth planet until scientists changed its label in 2006?

2. Which planet is the smallest in our solar system?

3. Which moon of Jupiter has more active volcanoes than any other place in our solar system?

4. What is the point in the sky straight above your head called?

5. The Big Dipper star pattern is part of which larger constellation?

6. About how often does Halley's Comet swing back close enough for people on Earth to see it?

7. About how long does it take Earth to spin around once?

8. Which bean-shaped organs clean waste out of your blood?

9. What is the small flap that covers your windpipe when you swallow?

10. Your shoulder can swing your arm in big circles. What kind of joint is it?

11. Which part of your brain helps you keep your balance and move smoothly?

12. What are the tiny air sacs inside your lungs called?

13. What are the small bones stacked up to make your spine called?

14. Most people's cells carry how many pairs of chromosomes?

15. Which part of your body has an iris, a pupil and a lens?

16. What is the biggest artery in your body called?

17. The Great Barrier Reef is built mostly by tiny animals called what?

18. What is the deepest known spot in the ocean called?

19. What do you call a scientist who studies volcanoes?

20. What do scientists call the instrument that records the shaking of an earthquake?

21. Long ago, most of Earth's land was joined in one giant supercontinent called what?

22. Which tall, towering cloud brings thunderstorms?

23. Cave formations that hang down from the ceiling like icicles are called what?

24. A sparkly diamond is made of which element?

25. Which force keeps the Moon traveling around Earth?

26. Who discovered penicillin, a medicine that fights germs, in 1928?

27. Which instrument measures air pressure to help forecast the weather?

28. What is the force that slows things down when they rub against each other?

29. What is the chemical symbol for sodium?

30. What do you call a scientist who studies fossils, like dinosaur bones?

31. Which ancient people built the great pyramids at Giza?

32. In 1903, where did the Wright brothers make their first powered airplane flights?

33. In which country can you walk along the Great Wall?

34. What language did people in ancient Rome speak?

35. In which ancient Greek place were the Olympic Games first held?

36. The giant stone statues on Easter Island are called what?

37. What was the name of the Aztec capital city, built on an island in a lake?

38. The Inca kept records using colorful knotted strings called what?

39. What were the long, narrow wooden ships of the Vikings called?

40. The ancient city of Petra, carved into pink rock cliffs, is in which country?

41. Ancient Egyptians made a paper-like writing material from which plant?

42. How many degrees are in a right angle?

43. How many sides does an octagon have?

44. How many edges does a cube have?

45. A dozen dozens, or 144 things, is called what?

46. How many years are in a millennium?

47. What is the answer to a multiplication problem called?

48. What is the bottom number of a fraction called?

49. A triangle with all three sides the same length is called what?

50. Rearranging the letters of 'listen' to spell 'silent' makes what kind of word puzzle?