how old is the water on earth
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Earth has water older than the Sun By reconstructing conditions in the disk of gas and dust in which the Solar System formed, scientists have concluded that the Earth and other planets must have inherited much of their water from the cloud of gas from which the Sun was born 4.6 billion years ago, instead of forming later.
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How Old is the Earth In a recent reevaluation, Tera (125) concludes that the age of the Earth is about 4.54 billion years. Tera also summarizes several other lead models for the Earth’s age; they all give results within the range 4.43 to 4.59 billion years.
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Atmospheric Electrostatics Editor's Note: We asked several scientists from various fields what they thought were the greatest mysteries today, and then we added a few that were on our minds, too. This article is the last of 15 in LiveScience's Greatest Mysteries series. Earth is estimated to be about 4.5 billion years old, and for much of that history it has been home to life in one weird form or another. Indeed, some scientists think life appeared the moment our planet's environment was stable enough to support it.
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Summary of the Water Cycle There is not really much fresh ware on Earth. 1.74% of all Earth's water is in this frozen form as ice caps, glaciers and snow. Only 0.75% of Earth's water is liquid water and potentially accessible as fresh water in ground water, lakes, streams and swamps. Long Answer: About 97.5% of water on Earth is salt water and 2.5% fresh water. All of the oceans are salt water and the oceans represent more than 96% of all water on Earth. Of the 2.5% fresh water, only 0.3% is in liquid form on the surface. Most of the rest is frozen or underground. Less than .01 % of all water is in lakes and rivers.
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- The Earth is made of approximately 71% water. Of this amount, 97.5  percent is contained in the saltwater oceans while the remaining  2.5 percent is in freshwater lakes and …rivers and in the polar ice.
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The Earth has lost a quarter of its water This finding can be used to show that back in time there was more water on Earth than today. Although water covers 70 percent of the Earth's surface, water is actually a rare substance that represents just 0.05 percent of the Earth's total mass. Water has nevertheless played a crucial role in the emergence of life on Earth. Without water, the Earth would in all likelihood be a dead planet. The amount of water on the planet has not always been the same, however. A research group at the Natural History Museum of Denmark has discovered this by measuring how hydrogen isotope ratios in the oceans have changed over time.
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- Most physicists believe the earth is 4.5 billion years old. And the results of Terra, run with that assumption, works out OK. On the other hand, run the program assuming the earth is less than 10,000 years old, and that there was a catastrophic universal Flood, and all the geology works out OK that way also!
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- have a limited amount of usable fresh water. Over 97 percent of the earth’s water is found in the oceans as salt water. Two percent of the earth’s water is stored as fresh water in glaciers, ice caps, and snowy mountain ranges. That leaves only one percent of the earth’s water available to us for our daily water supply needs. Our
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- Earth is estimated to be about 4.5 billion years old, and for much of that history it has been home to life in one weird form or another.Indeed, some scientists think life appeared the moment our planet's environment was stable enough to support it. 2012 LiveScience.com. All rights reserved. Earth is estimated to be about 4.5 billion years old, and for much of that history it has been home to life in one weird form or another. Indeed, some scientists think life appeared the moment our planet's environment was stable enough to support it.
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- Viewed from space, one of the most striking features of our home planet is the water, in both liquid and frozen forms, that covers approximately 75% of the Earth’s surface. Geologic evidence suggests that large amounts of water have likely flowed on Earth for the past 3.8 billion years—most of its existence.
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- In all, the Earth’s water content is about 1.39 billion cubic kilometers (331 million cubic miles), with the bulk of it, about 96.5%, being in the global oceans.
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The Earth has lost a quarter of its water This finding can be used to show that back in time there was more water on Earth than today. (Photo:Colourbox) Although water covers 70 percent of the Earth's surface, water is actually a rare substance that represents just 0.05 percent of the Earth's total mass. Water has nevertheless played a crucial role in the emergence of life on Earth.
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The World's Water The image shows that Earth's water resides in a very thin slice all around the Earth's surface. Distribution of Earth's Water In the first bar, notice how only 2.5% of Earth's water is freshwater - the amount needed for life to survive. The middle bar shows the breakdown of freshwater. Almost all of it is locked up in ice and in the ground.
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How much water is there on, in, and above the Earth? The vast majority of water on the Earth's surface, over 96 percent, is saline water in the oceans. The freshwater resources, such as water falling from the skies and moving into streams, rivers, lakes, and groundwater, provide people with the water they need every day to live.
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Prehistoric life History of life on Earth Pangea supercontinent from space, as it may have looked 300 million years ago. The Earth is a little over 4.5 billion years old, its oldest materials being 4.3 billion-year-old zircon crystals. Its earliest times were geologically violent, and it suffered constant bombardment from meteorites.
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How much of earths water is fresh? Assuming you mean How much of the water on Earth is fresh water, about 5% of the water on the Earth is fresh water, as opposed to about 95% salt water. To anser your questio…n directly though, 100% of the fresh water we know about is on Earth.
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Water Resources The world’s water exists naturally in different forms and locations: in the air, on the surface, below the ground and in the oceans. Just 2.5% of the Earth’s water is freshwater, and most is frozen in glaciers and ice sheets. About 96% of all liquid freshwater can be found underground. The remaining small fraction is on the surface or in the air.
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How Old is Earth? By dating the rocks in the ever-changing crust, as well as neighbors such as the moon and visiting meteorites, scientists have calculated that Earth is 4.54 billion years old, with an error range of 50 million years. Several attempts to scientifically date the planet have occurred over the past 400 years.
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The Earth has lost a quarter of its water (Photo:Colourbox). Although water covers 70 percent of the Earth's surface, water is actually a rare substance that represents just 0.05 percent of the Earth's total mass. Water has nevertheless played a crucial role in the emergence of life on Earth. Without water, the Earth would in all likelihood be a dead planet.
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Water covers 70 percent of the Earth's surface, but only a fraction is fresh Public Release: 25-Aug-2015 Water covers 70 percent of the Earth's surface, but only a fraction is fresh. Tampa, Fla. (Aug. 25, 2015) - Fresh water--connecting and sustaining all aspects of life on Earth, including food and energy--is in great danger.
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Early Earth âwas covered in waterâ Earth was once a ‘waterworld’ much like the one depicted by Hollywood, scientists believe. A new model of the early Earth suggests that until around 2.5 billion years ago oceans covered almost the whole of the planet. Just 2% to 3% of the Earth’s surface would have been dry land, compared with 28% today. Earth was once a ‘waterworld’, scientists believe. The Earth at that time may have resembled the way it looked in Waterworld, the 1995 post-apocalyptic sci-fi movie starring Kevin Costner. In the film, humanity struggles to survive after the ice caps melt and inundate the planet with water.
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Huge Underground Reservoir Holds Three Times as Much Water as Earthâs Oceans Huge Underground Reservoir Holds Three Times as Much Water as Earth’s Oceans. Earth is a jewel of the solar system, painted blue by the vast oceans that hold the majority of our planet’s water—or so we thought. Most of Earth’s water, according to a new study, may actually be locked in a reservoir 400 miles underground. That Earth, for much of its history, has been covered by water isn’t much of surprise. But how so much water ended up on a planet that, at its birth, was boiling hot has puzzled scientists for decades.
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Atom 1 Nearly 98% of the Earth's water is in the oceans. 2  Freshwater makes up less than 3% of water on earth, and over two-thirds of this is tied up in polar ice caps and glaciers. 3  Freshwater lakes and rivers make up only 0.009% of water on Earth and groundwater makes up 0.28%. 4  Water is essential for all life forms.
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How Science Figured Out the Age of Earth And the oceans have long since approached something close to a steady state, with chemical sediments removing dissolved minerals as fast as they arrive. Nevertheless, by the late 19th century the geologists included here had reached a consensus for the age of the earth of around 100 million years.
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Environmental Science: Earth's Water Even though the planet is 71 percent water, the largest percentage of Earth's water is saltwater in the oceans and cannot be used for drinking. The table describes the main locations of water on Earth. Notice that about 98 percent of Earth's water is saltwater. The remaining 2 percent is freshwater, but the majority of that percentage is found in the polar ice caps and glaciers, which is not readily available to us.
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- A previous version of this article, published in 2000, is now archived as a PDF file. Viewed from space, one of the most striking features of our home planet is the water, in both liquid and frozen forms, that covers approximately 75% of the Earth’s surface. Geologic evidence suggests that large amounts of water have likely flowed on Earth for the past 3.8 billion years—most of its existence.