Sites for Teachers
Tides and currents are affected by relative positions of the moon and Earth. They are also affected by shapes of bays and estuaries. This page provides diagrams of elliptical orbits.
Physical Oceanographic Real-Time System (PORTS®)
Page provides an overview of PORTS, its history, its objectives and links real-time data for commerce, science and personal safety
Page is a lesson about tidal currents, provides glossary and links to other lessons. Does not include assessment questions.