Salinity is the saltiness of a body of water and can be measured using refraction. Watch the Salinity Testing video and complete the associated worksheet to study the salinity of the St. Johns River with a Riverkeeper Educator. Then become the scientist and experiment at home on how different levels of salinity can change the angle of refraction. Review important terminology, learn to follow a scientific procedure, and answer some questions about the importance of salinity for the health of the St. Johns River ecosystem and its inhabitants.
Salinity Testing Video Worksheet
Salinity Experiment Procedure