How does the water stay on the Earth?

Answer 1

Because the earth's atmosphere creates consistent heat above freezing but bellow evaporating temperature, so the water doesn't freeze but is always effected by gravity. Comets and meteorites that impact earth also carry water. SOME water also melts when in direct sunlight (though not all if the planet/object does not have an atmosphere).

Answer 2

The force of gravity causes the water on earth stay on it.

Answer 3

The proposition is true only in so far as the planet has had some form of liquid on its surface. For the first quarter of a billion years of its life, the liquid was molten rock - not water. Liquid water came later, although scientists are far from agreed as to its source.

There are several reasons for the continued presence of liquid water:

• Orbital distance: The Earth - Sun distance is such that, in combination with the factors mentioned below, the surface temperatures are appropriate for liquid water.
• Rotation: the daily rotation prevents the Earth from reaching extremes of temperature.
• Gravity: the Earth's gravity is strong enough to hold on to its surface water.
• Atmosphere: the Earth's gravity is strong enough to maintain a relatively stable atmosphere. This moderates the Earth's temperature.

Answer 4

The earth is in what astronomers call the 'Goldylocks Zone': Just the right distance from our sun that liquid water can exist.