Naked Science Forum

General Science => General Science => Topic started by: neilep on 22/08/2007 19:38:19

Title: Salt Water & Fresh Water...they're the main two eh ?
Post by: neilep on 22/08/2007 19:38:19

Hi All,

This is Sea Water:

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Nice Isn't it ?..wanna swim with me ?...get yer kit orf then !!


and this is a freshwater lake !

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..also nice !

A few questions!


Why are freshwater places found mainly inland ?

Why is the sea so salty in the first place ?

Am I wrong ?..are there some freshwater seas out there ?

Is SALT the only difference of the two waters or is there even more chemistry involved ?

Title: Salt Water & Fresh Water...they're the main two eh ?
Post by: Karen W. on 22/08/2007 19:50:21

Is it because the fresh water comes usually from perhaps mountain rivers steams and perhaps underwater streams that would end up being massively filtered biologically traveling through the soils and such filtering out the salts in the process or is that guess way outta there?

Title: Salt Water & Fresh Water...they're the main two eh ?
Post by: neilep on 22/08/2007 19:59:36

Quote from: Karen W. on 22/08/2007 19:50:21

Is it because the fresh water comes usually from perhaps mountain rivers steams and perhaps underwater streams that would end up being massively filtered biologically traveling through the soils and such filtering out the salts in the process or is that guess way outta there?

Sounds reasonable to me Karen Mam.....gosh !!...ewe know stuff too !!

I'm beginning to feel quite lonely here in the emptiness of my head !!

Title: Salt Water & Fresh Water...they're the main two eh ?
Post by: Karen W. on 22/08/2007 20:32:18

May sound reasonable but I am only guessing as to where lake waters come from!

Your heads no more empty then Einsteins himself!!!LOL

Title: Salt Water & Fresh Water...they're the main two eh ?
Post by: another_someone on 22/08/2007 21:56:03

Sea water evaporates under the heat of the Sun, which leaves the sea more salty (slightly salty water, remove some of the water by heat, and the remaining water is more salty).

This distilled water then falls upon the mountains as rain.  As it travels along the rivers, it pick up minerals from the soil (including salts) which get carried down to the sea, where the water is evaporated again, leaving the salts behind again.

The most extreme example of this is the Dead Sea in Israel, where there is no outflow to the sea, so the water remains in the sea, being fed by the Jordan river, and evaporating under the heat of the desert Sun, making probably saltiest seas in the world.

Title: Salt Water & Fresh Water...they're the main two eh ?
Post by: neilep on 22/08/2007 22:18:35

THANK YOU VERY MUCH GEORGE ...I've had the pleasure of " floating " in the dead sea..it's quite an experience !!

But what about fresh water lakes ?..are they just made by precipitation ?

Title: Salt Water & Fresh Water...they're the main two eh ?
Post by: ukmicky on 22/08/2007 22:30:05

Quote

THANK YOU VERY MUCH GEORGE ...I've had the pleasure of " floating " in the dead sea..it's quite an experience !!

You should try Scuba diving ,it absolutely fantastic, the most amazing experience ever.

Title: Salt Water & Fresh Water...they're the main two eh ?
Post by: neilep on 22/08/2007 22:34:07

Quote from: ukmicky on 22/08/2007 22:30:05

Quote

THANK YOU VERY MUCH GEORGE ...I've had the pleasure of " floating " in the dead sea..it's quite an experience !!

You should try Scuba diving ,it absolutely fantastic, the most amazing experience ever.

I would luff to do that very much too !!

I know the world down there is stunningly beautiful* !!..I envy your scuba diving ability !!






*  I suppose the vicinity of the local sewerage exit pipe is not the place to enjoy scuba luff !!

Title: Salt Water & Fresh Water...they're the main two eh ?
Post by: another_someone on 22/08/2007 22:38:50

Quote from: neilep on 22/08/2007 22:18:35

But what about fresh water lakes ?..are they just made by precipitation ?

All terrestrial water originates in precipitation.  Freshwater lakes are usually fed by freshwater rivers - in principle, the same as the Dead Sea; the difference is that the Dead Sea has no outflow, so the water just sits there getting ever more concentrated as it evaporates away, whereas most fresh water lakes will have the water flowing out of it before it has had much time to concentrate by evaporation.

Title: Salt Water & Fresh Water...they're the main two eh ?
Post by: Bass on 23/08/2007 05:33:17

Quote from: another_someone on 22/08/2007 22:38:50

All terrestrial water originates in precipitation.  Freshwater lakes are usually fed by freshwater rivers - in principle, the same as the Dead Sea; the difference is that the Dead Sea has no outflow, so the water just sits there getting ever more concentrated as it evaporates away, whereas most fresh water lakes will have the water flowing out of it before it has had much time to concentrate by evaporation.

Holy schist, Batman, where does the precipitation come from??? 
At one time, back in ye olde PreCambrian days, there was no terrestrial water (or seawater).  The first water came from...... (gasp) [:o].....(say it ain't so) ......ROCKS!

Title: Salt Water & Fresh Water...they're the main two eh ?
Post by: neilep on 23/08/2007 13:50:39

As a firm believer in empirical study I picked up some rocks and tried to squeeze the juice out of them !!...I can't believe it.....!!  I got rock juice !

Title: Salt Water & Fresh Water...they're the main two eh ?
Post by: Karen W. on 23/08/2007 13:54:31

LOL LOL!

Title: Salt Water & Fresh Water...they're the main two eh ?
Post by: Bass on 23/08/2007 17:18:27

Rock juice is high in antioxidants.