What causes ocean currents? What impact do they have on Earth’s environment? How have they influenced human history?

This teaching guide for grades 5-8 provides 7 activities for students to explore the causes and impacts of ocean tides and gain an understanding of the influences of wind, temperature, salinity and density on ocean movement.

Students are given the opportunity to explore such real-world situations as the 1990 Nike shoe spill, the raft Kon Tiki, and other oceanic voyages in history.

From Great Explorations in Math and Science (GEMS). ISBN 0-924886-44-7. $21.00. Order online at www.lhsgems.org.