What characteristics of water molecules make it unique?

Water molecules are polar, so they form hydrogen bonds. This gives water unique properties, such as a relatively high boiling point, high specific heat, cohesion, adhesion and density.

Because water seems so ubiquitous, many people are unaware of the unusual and unique properties of water, including:

Boiling Point and Freezing Point.

Surface Tension, Heat of Vaporization, and Vapor Pressure.

Viscosity and Cohesion.

Solid State.

Liquid State.

Gas State.

any abiotic or biotic factor in an ecosystem that causes a population's size to slow or decrease is a limiting factor.

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