system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 Why does water expand when frozen, when solid is supposed to be "denser" than it is in liquid form and gas form?

If we compress gas, we get liquid.
If we compress liquid, we get solid.

So, why does frozen water have a larger volume than when it was liquid?
gpt
Water molecules are triangle shaped.

When they're liquid, they like to be close together and dense: ▲‌▼▲


When they freeze, they like to line up in a triforce:

‌ ‌ ▲

▲‌ ▲

Certain points of the triangles like to be near each other.