This collection of animations introduces students to planetary motions, gravitational effects, and the scale of astronomical distances. Students can view visualizations of Earth's changing seasons, circumpolar motion,...

This site explains the relationship between our tides on Earth and the Moon. Differential forces are explained as a function of distance from various points on Earth to the Moon. The site explains both a simple tidal...

National Ocean Service (NOS) scientists collect, study, predict and disseminate information about tides and water levels. Tutorial introduces the causes and variations of tides and currents, their impacts on human...

This website provides datasets (starting in 1988) about tidal wetlands in Virginia, human impacts, management practices and results of management on the resources. Select data by year, activity, watershed, or wetland...