❓ why
Why does ice float on water?
ScienceChemistry
Quick Answer
Ice floats because it is less dense than liquid water, thanks to the open crystal structure formed when water freezes.
The Full Story
When water freezes, hydrogen bonds lock the molecules into a rigid hexagonal lattice. This structure leaves more empty space between molecules than in liquid water, making ice about 9% less dense. Because of that lower density, ice floats instead of sinking. This unusual property is crucial for life in lakes and oceans, because floating ice insulates the water below and helps organisms survive winter. Most substances become denser when they solidify, but water is a notable exception.
Key Facts
1.Ice is about 9% less dense than liquid water
2.Water expands as it freezes
3.Floating ice insulates water below
YouTube Angle
Suggested video title for this topic:
"Water breaks the rules — and that’s why lakes don’t freeze solid."