Oceans and salt water
We have several questions which relate to oceans. 1) Why can't humans
drink salt water? 2) Why are the oceans made of salt water? 3) Do all the oceans
contain the same level of salt water?
Humans can't drink salt water because the kidneys can only make urine that
is less salty than salt water. Therefore, to get rid of all the excess salt taken in
by drinking salt water, you have to urinate more water than you drank, so you die of
dehydration. All parts of all oceans are not the same, a lot of this because of fresh
water runoff from streams.
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Update: June 2012