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All the Water on Planet Earth

Posted: 15 May 2012, 16:44
by FlyTexas
From the 'Astronomy Picture of the Day' website. Wow! :-O

http://apod.nasa.gov/apod/image/1205/wa ... le_950.jpg

How much of planet Earth is made of water? Very little, actually. Although oceans of water cover about 70 percent of Earth's surface, these oceans are shallow compared to the Earth's radius. The above illustration shows what would happen if all of the water on or near the surface of the Earth were bunched up into a ball. The radius of this ball would be only about 700 kilometers, less than half the radius of the Earth's Moon, but slightly larger than Saturn's moon Rhea which, like many moons in our outer Solar System, is mostly water ice. How even this much water came to be on the Earth and whether any significant amount is trapped far beneath Earth's surface remain topics of research.

Brian

Re: All the Water on Planet Earth

Posted: 15 May 2012, 20:38
by DarrenL
I think we've had that much this last week in rain. :lol:

Re: All the Water on Planet Earth

Posted: 15 May 2012, 22:37
by airboatr
Even more alarming is over 96 percent of that figure is ocean and saline water found in the ground and lakes.
And most of the 3. (something) percent is glaciers, ice caps and surface snow and ice

The amount of fresh water in the world in comparison to the earth's mass in the photo you gave would hardly be seen I reckon.

.. I read up on the subject and here is the nitty gritty of it.

http://ga.water.usgs.gov/edu/graphics/e ... bution.png

http://ga.water.usgs.gov/edu/sc1.html

Re: All the Water on Planet Earth

Posted: 16 May 2012, 10:50
by Airspeed
Thanks for the above posts, I love 'em.
AND, to put EVERYTHING in perspective, try THIS on for size.......
http://htwins.net/scale2/scale2.swf?bordercolor=white

Re: All the Water on Planet Earth

Posted: 16 May 2012, 11:16
by DarrenL
Airspeed wrote:Thanks for the above posts, I love 'em.
AND, to put EVERYTHING in perspective, try THIS on for size.......
http://htwins.net/scale2/scale2.swf?bordercolor=white
Nice, reminds me of this one on youtube - http://www.youtube.com/watch?v=TdAe-sDJfdg

Re: All the Water on Planet Earth

Posted: 16 May 2012, 17:18
by Vancouver
Note to self, Fix that leaky faucett.

Re: All the Water on Planet Earth

Posted: 16 May 2012, 18:50
by Garry Russell
Vancouver wrote:Note to self, Fix that leaky faucett.
.

That would be tap in English :worried: :hide:

Could be right though...the outside tap with the garden hose fitted it very stiff and often jammed, so I usually have to force it *-)

Re: All the Water on Planet Earth

Posted: 16 May 2012, 23:05
by emfrat
8)

Re: All the Water on Planet Earth

Posted: 17 May 2012, 02:17
by FlyTexas
Garry Russell wrote:
Vancouver wrote:Note to self, Fix that leaky faucett.
.

That would be tap in English :worried: :hide:
Should I pronounce the letter 't' as a "fast d"? :dunno: ;) Gotta keep my American accent in check. :lol:

Brian

Re: All the Water on Planet Earth

Posted: 17 May 2012, 03:36
by Airspeed
Agreed Garry,
My immediate thought was that fixing a tap would be easier. And why is it that the US favours [favors?] nite over night, yet adds an extra four letters to a three letter word?
While we're on this language thing, what do our Free World residents make of the pop-up adverts for "Lisa Ho"?? :-O