SparTech - Hands-on lab exercise illustrates density and buoyancy concepts.
USA Today A detailed explanation of changes in air density and its effects.
News & Events
Mountain Climbing and Air Density
Bone Density and Cigarette Smoke
News from around the world of science.
Google - Research database allows searching of the scholarly literature.
How Stuff Works Descriptive animation explains how a submarine changes buoyancy.
National Taiwan Normal U. - Java Applet shows how buoyancy changes with density.
Next Generation Science Standards (NGSS)
Next Generation Science Standards: For States, By States
National Academies Press: A Framework for K-12 Science Education