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8/11/2019 Water and Earth-PPT
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WATERANDEARTH
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Earthisoneofver few
planets
in
our
galaxy
that
.
r s
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ean ra us o t e art = ,371 m
Total Surface area of the earth = 4 (6,371)2
= 510,064,472 km2
Of which 29% is Land and 71% is Water (sea, lakes andother Water bodies) [2]
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Hence , total Water surface
= , ,= 362,145,775 km2
The depth of the ocean can range from few meters to amaximum of 10.994 km (Mariana Trench). [3]
The average depth is 3.79 km. [3]
Total volume of Water on earth istherefore
= 362,145,775 x 3.79 km3
= 1,372,532,487 km3
(Cubic Kilometers)
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N w l k
all the 1,372,532,487 cubic kilometers of
And see how terrible the Earth looks without
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Remember, we extracted 1,372,532,487 km3 of
Right?
Now, lets make a ball out of it
Volume = 1,372,532,487 km3
Hence, the radius of that ball
=
3
, , ,= 689 km = , .
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Thats unimaginable !
,
But, lets compare it with the Earth of
,
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Surprised ?
But, theres more to the story.
Out of this Water ball, 97% of Water are saline, or salt-watermostly distributed as oceans and salt-water lakes. [2]
The remaining 3% are the fresh-waters on the Earth, [2]
Antarctic, Greenland and other Arctic ice-caps,
Glaciers
Groun Water an perma rost groun ce Fresh-water lakes
Rivers
Moisture content in the atmosphere
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Hence the volume of fresh-water on earth= 3% of 1,372,532,487 km3
= 1 1 km3
-huge saline Water ball.
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Still more .
Of this little Fresh-water ball [2]
68. % form ice ca s and laciers
30.1 % form the ground water 0.86 % form the permafrost
.
The remaining 0.3 % forms the fresh-watera es, r vers an swamps. 123,52 m .
on land, including humans, land animals andvegetation.
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Youneedasharpvisiontospotit!
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Do you still think that..,
An you can eep wast ng t
indefinitely
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Save and Recycle Water
an you
Hasan Babu Hhasanbabu@gmail.com
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: . . _ _ _
[2] http://en.wikipedia.org/wiki/Water_distribution_on_Earth
[3] http://en.wikipedia.org/wiki/Ocean
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