SEDL
Oceans [Pdf]
This large PDF file integrates math, science, and language into several lessons about characteristics of the oceans. Topics include ocean currents, tides, density, marine life, and pollution.
CK-12 Foundation
Ck 12: Biology: Science Experiments
[Free Registration/Login may be required to access all resource tools.] Introduction to scientific experiments.
CK-12 Foundation
Ck 12: Biology: Science Experiments
[Free Registration/Login may be required to access all resource tools.] Introduction to scientific experiments.