Why do giant metal ships float? episode artwork - The Curious Kidcast
Episode 36

Why do giant metal ships float?

00:09:59 Season 2 Ages 7–11 2 min read

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📋 Show Notes

Ever dropped a tiny metal coin into water and watched it sink straight to the bottom, yet wondered how an enormous steel cruise ship carrying thousands of people can float like a rubber duck? In this episode of The Curious Kidcast, host Charlie dives headfirst into one of the biggest curious kids questions in science!

Join us on a laugh-out-loud voyage as we discover the amazing physical forces that let hundred-thousand-ton ships glide across the ocean waves. We'll explore:

  • The soggy history of ancient Greek scientist Archimedes and his famous bathtub "Eureka!" moment.
  • How displacement and water pushing back creates the invisible superhero known as the buoyant force.
  • Why density matters using a hilarious crowded school bus analogy.
  • The secret superpower of a ship's hollow hull and why air pockets make all the difference.
  • Mind-blowing facts about whether you can actually build a floating boat out of solid concrete!
  • A fun interactive brain-teaser quiz at the end to test your new knowledge.


Whether you're looking for a fun podcast for kids for family road trips, an engaging science resource for homeschooling, or simply love the best kids curiosity podcasts, this episode is packed with fascinating facts to help curious young minds learn about nature, physics, and the world around them.

Explore More & Send Your Questions:

Do your kids have wild, funny, or weird science questions they want answered on the show? Head over to curiouskidcast.com to submit your questions. Don't forget to hit subscribe and share this episode with your friends and family!