In the last hundred years, Million years? Why or why not
2006-09-28 13:46:04 · 8 answers · asked by Pablo 4 in Science & Mathematics ➔ Chemistry
G'day Pablo,
Thanks for your question.
The UN Environment Program estimates there are 1400 million cubic kilometers of water in all its forms. It would be difficult to do an accurate assessment as to any changes over time as water may change in form but not in volume. Melting glaciers may result in rising seawaters but the overall volume of water has probably not changed. However, this may result in a change in the amount of water available for human consumption and ecosystems. The water cycle ensures that water remains on earth but its form may vary according to climate change.
I enclose sources for your reference.
Regards
2006-09-28 13:52:28 · answer #1 · answered by Anonymous · 0⤊ 0⤋
The quantity of water on the earth is a fluctuating quantity...
water reacts with other chemicals and sometimes the oxygen or the hydrogen is stripped off...
sometimes hydrogen burns and makes more water...
space debris is gathered in by earth's gravity and some of it contains water...
These amounts are minor when compared to the massive quantities and so the fluctuations are relatively tiny.
2006-09-28 21:20:31 · answer #2 · answered by ♥Tom♥ 6 · 0⤊ 0⤋
The earth's atmosphere is struck by meteors on a regular basis, and while they may be very dry, they probably are not completely dry. They, along with the mosture from comet tails, must add to the volume over time.
2006-09-28 21:00:35 · answer #3 · answered by nospamcwt 5 · 0⤊ 0⤋
yes because of global warming and the melting of the ice caps, the water level has rised and will continue to unless we stop polluting the air further which causes the green house affect to increase.
2006-09-28 20:49:33 · answer #4 · answered by Anonymous · 1⤊ 0⤋
It changes (increases) continually with water comets plowing into the atmosphere.
2006-09-28 20:49:28 · answer #5 · answered by Anonymous · 1⤊ 0⤋
no...there has always been the same amount of water on the Earth....becuz of the water cycle...clouds always have water in them...it rains...it evaporates...it starts all over again
2006-09-28 20:48:55 · answer #6 · answered by Blue 4 · 0⤊ 2⤋
yes,,,with the melting of ice-berg in the north pole
2006-09-28 20:57:32 · answer #7 · answered by Anonymous · 0⤊ 0⤋
YES. IT INCREASES EVERY YEAR DUE TO THE ICE BALLS THAT INVADE THE EARTH'S ATMOSPHERE FROM OUT YONDER.
2006-09-28 20:54:01 · answer #8 · answered by thewordofgodisjesus 5 · 1⤊ 0⤋