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Q: Would you find saltier water near the top or bottom of a column of water?
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Why does the ocean water get saltier after evaporation?

If water is evaporated salt remain in the ocean.


How salinity and temperature affects the seawater?

Salinity and temperature are conservative properties of seawater that directly affect the density of seawater. This is an extremely important property because it in turn directly affects upwelling and downwelling of oceans and some major oceanic currents. This is because if a denser body of water is sitting on top of a less dense body of water, the denser part of the water column will turn over (sink) to get to a more stable water column state. This leads to water mixing of nutrients and oxygen for organisms living in the water column. Typically the saltier the water, the higher the density and also the colder the water, the higher the density. So because of this, cold and salty water (Antarctic and Arctic) are the most dense bodies of water and typically stay towards the bottom of the ocean floor.


Why is the salt left behind when the water evaporates and will it make the remaning water saltier?

Salt is not evaporated.


What is the pressure at the bottom of the ocean?

The pressure at the bottom of the ocean can be determined by the formula P = dgh, where d = 1025 kg per cubic meter, g is the acceleration due to gravity and h is the depth of the water in meters. At the bottom of the Marianas Trench (11034 meters), the pressure would be 1.11 E5 kPa, or 1095 times normal air pressure at sea level.


How do you differentiate between pure water and mineral water without tasting them?

You could measure its resistance; the saltier it is then the better conductor it is.

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