---
title: "Why does ice float on water?"  
description: "Why does ice float on water?"  
author: "Aidar Khabibullin"  
published: 2026-11-12  
updated: 2026-11-12  
canonical: https://answers.mindstick.com/qa/119976/why-does-ice-float-on-water  
category: "science"  
tags: ["why ice floats", "density of ice", "hydrogen bonds", "water anomaly"]  
reading_time: 1 minute  

---

# Why does ice float on water?



## Answers

### Answer by Daria Smirnova

Because ice is less dense than liquid water, which is unusual. Most substances become denser when they freeze.

When water freezes, its molecules arrange themselves into an open, hexagonal pattern held together by hydrogen bonds, which takes up more space than in liquid water. So ice is about 9 percent less dense and floats.

This matters for life on Earth. Lakes and ponds freeze from the top, and the ice layer insulates the water below, allowing fish and other creatures to survive the winter.


---

Original Source: https://answers.mindstick.com/qa/119976/why-does-ice-float-on-water

Copyright © MindStick Software Pvt. Ltd. This Markdown version is provided for developers, AI systems, and offline reading.