• Categories

  • Most Popular Questions

  • Recently Viewed Questions

  • Recent Answers

    How To Make a Digita… on What does a frequency of 100 H…
    Daigrepont on Can an earthquake cause air tu…
    Benedict on How did God come into exi…
    joshua on How does the human body g…
    Ian on How did God come into exi…
  • Recent Questions

  • Blog Stats

    • 2,205,193 hits
  • Visitors since 11-3-08

    counter create hit
  • Terms and Conditions

  • Warning

    We are doing maintenance on this site, so some posts may disappear for a short time. Sorry. Normal service will soon be resumed...
  • Pages

  • March 2008
    M T W T F S S
    « Feb   Apr »
     12
    3456789
    10111213141516
    17181920212223
    24252627282930
    31  
  • Archives

  • Meta

For how long has water been on Earth for?

For how long has water been on Earth for?
Vic from Tyne and Wear (Age: 25-34)

Where did all the water come from [which makes up] the sea?
Mason Williams from Swansea (Age 5-14)

Where did water originally come from and how did it form?
Lewis Jones from Staffordshire (Age: 5-14)

Advertisements

2 Responses

  1. It seems highly likely that there has been water on the Earth since it first formed around 4,600 million years ago.
    It is widely thought that the Earth and most of the other planets in the Solar System formed from ice-covered dust particles. This ice, which was responsible for making the grains stick together to form snow-ball-sized lumps called planetesimals, consisted of water, methane, carbon dioxide and similar light molecules. These would, no doubt, have boiled when the planetesimals formed into planets (under the force of gravity) but once the plants cooled down they would have condensed into liquid.
    The outer planets are covered now in frozen ice, including water. It’s also common on all other planets, making it pretty sure that it has been there since they were formed.

  2. Water has been part of the Earth for pretty much as long as the Earth itself has been around – about 4560 million years – because it was part of the material that the Earth formed from. More would have been delivered by asteroids and comets in big impacts after the Earth accreted. Eventually you would have got water at the surface of the Earth as the planet cooled. We don’t know yet when the first oceans formed, but chances are it was within a couple of hundred million years after the Earth itself.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: