Curated OER
Why is There a Tidal Bulge Opposite the Moon?
Students simulate how the Moon causes ocean tides. In this earth science lesson, students calculate gravitational acceleration using a mathematical formula. They compare the force of attraction between the Earth, Moon and Sun system.
Curated OER
Our Universe: Always Moving, Always Changing
Students explore the main concepts of astronomy through the eleven lessons of this unit. The past, present, and future methods of studying the science are examined in this unit.