Thank you for allowing me an opportunity to answer your interesting question.
?Why is there so much salt in the ocean? Where does it come from??
Both of these questions can be answered at the same time, because the
reason why the ocean is so salty is relative to where the salt comes
from. Salt found in the ocean is actually a result of erosion. Salt is
a natural part of the earth?s crust and there happens to be so much of
it that it accumulates in our oceans. Rain water has somewhat of an
acidic affect upon the dry land. It erodes the land and rocks and what
is left is minerals such as salt. This salt washes toward the lowest
places when happens to be our oceans. Here the salt accumulates and
since it does not break down it makes the ocean salty. Shifting tides
in the oceans also contribute to this kind of erosion on the sea
floor. Salt is eroded from the earth beneath the sea and this too adds
to the salinity of the ocean waters. If all the salt in the sea could
be removed and spread evenly over the Earth's land surface it would
form a layer more than 500 feet thick, about the height of a 40-story
US GEOLOGICAL SURVEY
?Why is the Ocean Salty??
?Why does a ship float better in salt water than in fresh water??
Salt changes the density of water. Fresh water is not nearly as dense
as salt water because the salts dissolved in the water make it
?thicker? than pure water. Objects float better in water that is dense
and since the way things float is dependent upon how dense the fluid
is, things float better in salty water. Imagine how a small slice of
fruit might float better in your oatmeal than in a bowl of tap water.
This is the same basic principle that allows things to float better in
ENVIRONMENTAL LITERARY COUNCIL
Here is a little experiment you can do at home to see how things float
better in saltwater than in pure water.
?How does a ship float if it is made of steel??
To understand what makes a heavy steel ship float, you have to think
of ?floating? as the point at which an object stops ?sinking?. An
object floats on water because it displaces ? or takes the place of ?
the amount of water equal to it?s own weight. The more water the ship
displaces the bore ?boyant?, or floatable, it becomes. A ship (or
anything else that floats) sinks into the water until it has displaced
its own weight of water, then it will not sink any further. If a ship
weighing 100 tons is placed in the water, it will move aside up to,
but no more than 100 tons of water. Because a ship is a lot like an
empty bowl ? relatively thin steel on the outside and nothing but air
on the inside ? its actual density is less than that of the water it
displaces. So, a 100 ton ship will not displace so much water that it
goes down into the water below the sides of the boat. This causes the
ship to float on the water. This explains why a solid block of steel
will sink and a hollow bowl of steel that weighs the same will not.
HOW STUFF WORKS
?Why can boats made of steel float on water when a bar of steel sinks??
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