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).
water
water
I think its the water cycle
The three states of matter in which water can exist are gas, liquid, and solid.
Water must exist in order for any form of life to live on earth.
could water exist as a liquid if we don't have a atmosphere
could water exist as a liquid if we don't have a atmosphere
Water can exist in three states, liquid, vapor and as a solid. On the earth, it exists in all three states.
Water can exist in three states, liquid, vapor and as a solid. On the earth, it exists in all three states.
Water does exist on Earth. Earth is the only planet known to have liquid water.
Liquid, vapor, gas.
Liquid water.
liquid, solid, and gas :)
The earth is in what astronomers call the 'Goldylocks Zone': Just the right distance from our sun that liquid water can exist.
It has a large quantity of liquid water.
Water
water