probally fresh because no salt in mouth or eyes addition: it is easier to float/swim in seawater since seawater is denser than fresh water.
Salt water is denser than fresh water.
salt water is denser
You have it backwards. A ship floats higher in seawater than freshwater. This is because the dissolved salt makes seawater denser. due to the lack of salt content in fresh water. the salinity of ocean water makes it more dense, allowing the boat to sit higher in the water.
yes because of the salt
Because sand is denser than water. But I suspect you meant to ask "why is it easier to stay afloat in seawater than it is in fresh water". In which case the answer is the same: seawater is denser ... but not as dramatically, and the difference is small enough that you're unlikely to actually notice it unless you take careful measurements.
Blood is far denser than sea water as it has a whole bunch of cellular bodies mixed in with it. I think you wanted to ask "Which is denser seawater or serum?" In that case serum is still heavier even though it has less salt. Serum still has a wide assortment of exotic proteins dissolved in it.
sea water is less denser than river water.
Water that contains dissolved salts is more dense than pure water; consequently, seawater is denser or has more mass per unit volume than freshwater. Temperature, however, is one of the most important factors controlling density in the ocean.
No, it is seawater.
by evaporation
the seawater smells