earth's water where did it come from????
earth's water where did it come from????
Rain, lots and lots of rain!
earth's water where did it come from????
dont tell me you never heard of Noah :wah::wah::wah:
The Earth's water must have come from its interior, according to a scientist who has studied the ratios of oxygen isotopes in rocks. He says he can find no evidence to support the idea, suggested by some geologists, that it might have come from comets or other bodies which pelted the Earth and Moon between 4.6 billion and 3.8 billion years ago.
Karlos Muehlenbachs of the University of Alberta measured the ratio of oxygen isotopes in the oldest rocks known on Earth, which formed 3.96 billion years ago. He found that the ratios matched those of more recent rocks.
The most common isotope of oxygen is oxygen-16. Studies of meteorites indicate that comets contain a greater proportion of the heavy isotopes oxygen-17 and oxygen-18 than terrestrial rocks. According to Muehlenbachs, rocks that formed in early oceans should reflect this excess if comets or meteorites contributed more than 5 to 10 per cent of the water in the primordial oceans. His results lend support to the theory that the oceans were formed by water vapour released from the hot interior of the young Earth.
Francois Robert and Marc Javoy of the University of Paris reported similar results early this year, but they studied rocks only 3.4 billion years old. Age is critical because it takes about 200 million years for oxygen isotopes in the seas and crustal rocks to be homogenised by cycling through thermal vents in the ocean floor. Muehlenbachs concedes that his data only show that comets did not provide much water after 4.2 billion years ago.
The Earth's water must have come from its interior, according to a scientist who has studied the ratios of oxygen isotopes in rocks. He says he can find no evidence to support the idea, suggested by some geologists, that it might have come from comets or other bodies which pelted the Earth and Moon between 4.6 billion and 3.8 billion years ago.
Karlos Muehlenbachs of the University of Alberta measured the ratio of oxygen isotopes in the oldest rocks known on Earth, which formed 3.96 billion years ago. He found that the ratios matched those of more recent rocks.
The most common isotope of oxygen is oxygen-16. Studies of meteorites indicate that comets contain a greater proportion of the heavy isotopes oxygen-17 and oxygen-18 than terrestrial rocks. According to Muehlenbachs, rocks that formed in early oceans should reflect this excess if comets or meteorites contributed more than 5 to 10 per cent of the water in the primordial oceans. His results lend support to the theory that the oceans were formed by water vapour released from the hot interior of the young Earth.
Francois Robert and Marc Javoy of the University of Paris reported similar results early this year, but they studied rocks only 3.4 billion years old. Age is critical because it takes about 200 million years for oxygen isotopes in the seas and crustal rocks to be homogenised by cycling through thermal vents in the ocean floor. Muehlenbachs concedes that his data only show that comets did not provide much water after 4.2 billion years ago.
earth's water where did it come from????
:wah::wah:Did you Know Jimbo?
The overall amount of water on our planet has remained the same for two billion years.
Water moves around the earth in a water cycle. The water cycle has five parts: evaporation, condensation, precipitation, infiltration and surface run-off.
In a 100-year period, a water molecule spends 98 years in the ocean, 20 months as ice, about 2 weeks in lakes and rivers, and less than a week in the atmosphere.
Groundwater can take a human lifetime just to traverse a mile.
Most of the earth's surface water is permanently frozen or salty.
If all the world's water were fit into a gallon jug, the fresh water available for us to use would equal only about one tablespoon.
Over 90% of the world's supply of fresh water is located in Antarctica.
Less than 1% of the water supply on earth can be used as drinking water.
The earth's total amount of water has a volume of about 344 million cubic miles.
· 315 million cubic miles is seawater.
· 9 million cubic miles is groundwater in aquifers.
· 7 million cubic miles is frozen in polar ice caps.
· 53,000 cubic miles of water pass through the planet's lakes and streams.
· 4,000 cubic miles of water is atmospheric moisture.
· 3,400 cubic miles of water are locked within the bodies of living things.
Well did ya?? Did ya known that?
The overall amount of water on our planet has remained the same for two billion years.
Water moves around the earth in a water cycle. The water cycle has five parts: evaporation, condensation, precipitation, infiltration and surface run-off.
In a 100-year period, a water molecule spends 98 years in the ocean, 20 months as ice, about 2 weeks in lakes and rivers, and less than a week in the atmosphere.
Groundwater can take a human lifetime just to traverse a mile.
Most of the earth's surface water is permanently frozen or salty.
If all the world's water were fit into a gallon jug, the fresh water available for us to use would equal only about one tablespoon.
Over 90% of the world's supply of fresh water is located in Antarctica.
Less than 1% of the water supply on earth can be used as drinking water.
The earth's total amount of water has a volume of about 344 million cubic miles.
· 315 million cubic miles is seawater.
· 9 million cubic miles is groundwater in aquifers.
· 7 million cubic miles is frozen in polar ice caps.
· 53,000 cubic miles of water pass through the planet's lakes and streams.
· 4,000 cubic miles of water is atmospheric moisture.
· 3,400 cubic miles of water are locked within the bodies of living things.
Well did ya?? Did ya known that?
earth's water where did it come from????
So the water you drink may have been round before & been drunk by someone else.
And peed out by them
Eeeeeeeeuuuuuugh, you may be drinking what's left of someone's pee.
Just thought I'd say this before someone else did!
Haha!
And peed out by them
Eeeeeeeeuuuuuugh, you may be drinking what's left of someone's pee.
Just thought I'd say this before someone else did!
Haha!
earth's water where did it come from????
Joe;743109 wrote: So the water ou drink may have been round before & been drunk by someone else.
And peed out by them
Eeeeeeeeuuuuuugh, you may be drinking what's left of someone's pee.
Just thought I'd say this before someone else did!
Haha!
Well the way Jimbo takes the p*ss, my bet is we have all had a bit of his :wah::wah::wah::wah:
And peed out by them
Eeeeeeeeuuuuuugh, you may be drinking what's left of someone's pee.
Just thought I'd say this before someone else did!
Haha!
Well the way Jimbo takes the p*ss, my bet is we have all had a bit of his :wah::wah::wah::wah:
earth's water where did it come from????
jimbo;743117 wrote: i must say urine fine spirits today 
:D
potty mouth:wah::wah:
:Dpotty mouth:wah::wah:
earth's water where did it come from????
Do I have to explain everything around here ...... 
earth's water where did it come from????
hah hah excellent pheasy :wah::wah::wah:
-
Richard Bell
- Posts: 1228
- Joined: Sun Oct 16, 2005 8:56 am
earth's water where did it come from????
Joe;743109 wrote: So the water you drink may have been round before & been drunk by someone else.
And peed out by them
There is no "maybe" about it.
The water you drink today has been consumed countless times by creatures and plants since the beginning of life on this planet.
Your morning coffee was water lapped up by a dinosaur, 100 million years ago. Even then, it had been here for eons.
Makes ya think, eh ?
And peed out by them
There is no "maybe" about it.
The water you drink today has been consumed countless times by creatures and plants since the beginning of life on this planet.
Your morning coffee was water lapped up by a dinosaur, 100 million years ago. Even then, it had been here for eons.
Makes ya think, eh ?