In 150 BC, Seleucus of Seleucia theorized that the moon causes the tides. Scholars learn about what causes tides by studying the interactions of gravity between the sun, moon, and Earth. They use technology to formalize otherwise...

Students explore ocean tides. They research how the sun, moon and earth affect the tides. Students draw a diagram illustrating low tides and high tides. They discuss the affect of gravitational pull on the oceans.

Here is a document full of teaching notes on water quality and bodies of water that you can use in your ecology curriculum. It has information specific to the Hudson River area, but can easily be adapted to any local body of water....

Young scholars observe the movement of pendulums, they begin to understand the relationship between gravitational forces and the mass of objects, the changes in speed and direction of objects, and the distance between objects. They...