(1) A scientist wants to find out why ocean water freezes at a lower temperature that fresh water. (9) The scientist continues, "Therefore, I suggest that the reason ocean water freezes at a lower temperature is that ocean water contains dissolved salts while fresh water does not."

(5) After considering all this information, the scientist sits at a desk and writes, "My guess is that ocean water freezes at a lower temperature than fresh water because ocean water has salt in it."

3) In the library, the scientist also reads about the composition of ocean water.