Yes, it is true.
Salt
Evaporating the water salt is obtained.
Ocean water. The whole cycle starts with ocean water evaporating, so it is therefore the supplement.
Yes, it is true.
by evaporating in the air bacse when it evaporates the water may warm
Evaporating water the concentration of salts increase and so the density increase.
After evaporating of the water solid, crystallized, impure salts are obtained.
Salts are obtained as a residual solid.
The clouds are formed by water vapor evaporating from the ocean. The water vapor condenses and falls again as rain (or snow) thereby completing the water cycle.
The density of water increase, also the humidity of the atmosphere; the temperature decrease.
The water that doesn't evaporate into vapor stays in the ocean as liquid water. The oceans have a lot of liquid water. Over time, ocean water is always evaporating and turning into rain and comes back to the ocean; but the salts and minerals carried into the sea from rivers never evaporate. They stay dissolved in the ocean waters and make it saltier and saltier.
Homogeneous unless you include sea creatures and floating debris or debris that is in the water. Because you cannot separate ocean water from the chemicals or solvents that are in the water without evaporating the water or using a funnel which probably won't work (the funnel that is) anyway.