Because salinity (in concert with temperature) affects the density of seawater, it can play a role in its vertical stratification. Essentially, lower salinity water (= lower density) floats on top of higher salinity water (= higher density).
Alternative definition, a choice limited to one of two or more possibilities, as of things, propositions, or courses of action, the selection of which precludes any other possibility: You have the alternative of riding or walking. See more.
1 Research- Find out as much as you can.  Hypothesis- Try to predict the answer to the problem. Another term for hypothesis is âeducated guessâ. This is usually stated like â If Iâ¦(do something) thenâ¦(this will occur)