Water

Water is H₂O. The molecule is bent and polar, so hydrogen bonds form between neighbors. That is why it expands when it freezes, why it can climb xylem, and why so much of chemistry happens in solution.

Rain, river, blood, brine, mist, well, and Current on the map feed Water. Tides are not a type of their own; they are water moved by gravity in a cycle. Melt, Sediment, Clay, and Erosion are water changing phase, putting down grit, or taking stone apart.

formula

H2O