Earth is located in just close enough from the sun where the heat from it keeps water melted mostly, and just far enough away where the water doesn't turn into water vapor.
Liquid water is also capable of forming on Mars, if it had a stable, warm atmosphere.
So far, Earth is the only planet we know of that has all three states of water.The three states of water are: liquid, solid (ice) and gas (water vapor).
The vapor form, the liquid form, and the solid form are.
All of the solar planets are believed to have some amount of water somewhere, though not necessarily in liquid form. The only planet with significant quantities of surface water is Earth (Venus is too hot; Mars and Mercury don't have enough atmosphere (though Mars may have had surface water at one time); the gas giants don't really have solid surfaces).
The only planet known to have liquid surface water is Earth, but probably all planets have at least some water. Water is made of two of the three most common elements in the universe, so it's not an exotic compound. Mars has frozen water in its polar caps (and may have had liquid surface water at one time). A number of moons orbiting Jupiter and Saturn have frozen water on their surface and possibly liquid water below that.
It is the distance between a star and an earth-like planet
Earth is the wettest known planet. It is the only planet known to have liquid water. The only other planet with any form of water is Mars with ice on one of the poles.
So far, Earth is the only planet we know of that has all three states of water.The three states of water are: liquid, solid (ice) and gas (water vapor).
It is also found as a gas. This is because Earth orbits its star at a distance where the heat form the star is enough for water to be present in the liquid form. Extremes on the planet then allow for water to be solid and vapor in places.
Earth by far. Mars has very little water and it is only in the form of ice and trace amounts of water vapor. Never in liquid state because Mars does not have enough atmospheric pressure to allow water to be a liquid.
earth is the only planet where the same substance can exist in gaseous , liquid , and solid form
The most abundant form of water on Earth is liquid.
Depends on what you mean. If you meant flowing liquid water, than Earth is the only world known to have that property of water in a permanent form. But if you mean water in general than Mars has a lot of water frozen in both sides of its polar caps.
I presume when you say "form" you mean state, and if I presume correctly the answer is all three states: gas, liquid and solid. However, liquid is the most predominate state.
Earth, of course, and possibly Mars. Recent photos of Mars show dewdrops of a liquid which certainly appears to be water condensing on the landing struts of the Polar Observer.
Liquid form
earth is the only known habitable place because its the only one with water, food, and has the right temperature range for life as we know it, but scientists are discovering planets a lot like earth, but none are habitable for humans
because the water molacue is liquid at tempreture of the earth