Click here for a printable worksheet to use with this lesson. Record your "observations" about OCEAN observations.

How large is the ocean? How deep is the ocean? What lives in the ocean? What causes the currents, and other conditions in the ocean, to change? Does the ocean affect the weather on land? How can we explore the ocean? People have asked questions about the global ocean for thousands of years. Even so, we still know relatively little about the watery world of the ocean. In fact, people have spent dramatically more time and money learning about outer space then about our world's oceans or "inner space" here on Earth!

The Evolution of Oceanography