University of California
University of California: Seawater Density & Salinity [Pdf]
Describes the properties of seawater and the variations depending on its location, e.g., near a shoreline, in an estuary, or as sea ice. Discusses the instruments scientists use to measure the density of water and explains other...
Scholastic
Scholastic Instructor: Seashore Science
Come and learn with this incredible seashore science resource. The content includes fun facts, experiments, reproducible activities, resources and more.