Water exists in our environment as a liquid gas and solid.
water
If a substance that exists in liquid state was not in liquid state then it was in its other states of matter namely solid, gaseous.
Water is the only substance that commonly exists as a solid, liquid, and gas in Earth's atmosphere. Solid water is ice, liquid water is water, and gaseous water is water vapor.
No solid substance exists that never melts. All substances have a melting point at which they transition from a solid to a liquid state due to changes in temperature.
A substance that exists as both a liquid and a solid at the same time is called a "solid-liquid mixture" or a "suspension." This occurs when a solid material is evenly dispersed throughout a liquid, creating a two-phase system.
It's called sublimination
When a substance changes from liquid to solid is called freezing.
A substance changes from a solid to a liquid at its melting point
We know that for any given substance, and at a given pressure, the gas phase exists at a higher temperature than the liquid phase, which exists at a higher temperature than the solid phase. And temperature measures heat energy per molecule or atom, hence, gas particles have more energy than particles of the same substance in their liquid or solid phase.
At a unique temperature, called the "freezing point", for each pure substance at a constant pressure, a solid form of the substance can change from solid to liquid phase by absorbing heat energy from its environment without raising the temperature of the substance, and, at the same temperature and pressure, a liquid phase of the same substance, can solidify without changing its temperature if it can transfer heat energy to the external environment.
Any substance can be a liquid, solid or gas, provided it has the right amount of energy; water is the only one to naturally occur in all three states on Earth, though.
Water is a substance that can exist in all three states of matter: solid (ice), liquid (water), and gas (water vapor).