Where Does Water Come From?

Water is like 75% of earth. But you can't make new water. You can only reuse the the water thats already on earth. That explains the water cycle and stuff but the same water that's been on earth for millions of years is still being used today. It doesn...

if you burn hydrogen in air you get water this I know. If the density of water is several times that of air then we are talking a massive amount of hydrogen tied up in water so where did it all come from.

My husband and I were filling our bathtub with water and these tiny wiggly worms are everywhere in the water. I started to get in and thought it was dirt and tried to fish out the "dirt" when I noticed the little round dot of dirt unrolled...

It might be a crazy thought, but is there a chance that the water from the washing machine might be water that got flushed from the toliet (toliet water, including pee)?

And how did it get so far underground? How did people first figure out that digging in the ground would get you water?

what is the reason for the rise in level of water in capillary and from where does it get its potential energy which is it gains because of increase in height of water?

It may be the same principle of "toast sweat" - where does the water come from? The air, table, or coffee cup? Something else?

The earth has 1,097,509,500,000k3 of mass. It would take 4,525,000,000,000k3 of water to cover the whole earth with water-that is 4 times the entire volume of the earth-where did the water come from? Correct me if my numbers are way off.

Explain flooding to me So they're expecting up to 20 inches of rain in New Orleans. And the city may be under 10 feet of water. Huh? Ok, so figure if the city is 100 square Kms (10x10) it would take 300 million square metres of water to put it 10 feet...