Kids Learning Lab - Science, History, and Technology for Kids and Family
Oct 19, 2026 · 2 min · 3 segments
In this twenty-eighth Kids Learning Lab bonus episode, we’ll learn why ice float. Bonus episodes come every 2 days and have a random fun fact to learn about.
No entities detected.
Today's question is, [ice cubes clinking in glass] have you ever noticed that ice cubes always float at the top of a drink instead of sinking? Most substances get denser and sink when they turn solid, but water is unusual.
When water freezes into ice, its molecules arrange themselves into a special crystal pattern that actually takes up more space than liquid water.
And because ice takes up more space with the same amount of matter, it becomes less dense than the water around it, and less dense things float on top of denser things.
This is really important for lakes and oceans, because ice helps form a layer on top that helps protect the water and creatures underneath from freezing solid.
So ice floating is actually just the water forming into a crystal, which reduces its density.
Today's question is, [ice cubes clinking in glass] have you ever noticed that ice cubes always float at the top of a drink instead of sinking? Most substances get denser and sink when they turn solid, but water is unusual.
When water freezes into ice, its molecules arrange themselves into a special crystal pattern that actually takes up more space than liquid water.
And because ice takes up more space with the same amount of matter, it becomes less dense than the water around it, and less dense things float on top of denser things.
This is really important for lakes and oceans, because ice helps form a layer on top that helps protect the water and creatures underneath from freezing solid.
So ice floating is actually just the water forming into a crystal, which reduces its density.
The rest of this transcript — segmented and speaker-labeled, so you land on the exact moment something was said
Search every transcript — by keyword, by phrase, or by meaning, across every show Radar indexes
Trends — what is surging across podcasts, measured against its own baseline
Alerts — when a name you follow appears in a newly indexed episode
No account is needed to search Radar.