This site examines the specific difference between mass and weight in addition to length, temperature, and time.

On this interactive site students learn to use various units of mass to solve problems and put objects in order by their mass.

Explore the societal stigma that accompanies people who are overweight, and research current medical thinking on "ideal weight." Identify how the perception of body image can lead to eating disorders.

The concern over obesity in children in the United States is staggering. This site provides research and statistics along with suggesting ways to change the epidemic. Includes video.

By the end of this section, you will be able to define net force, external force, and system; understand Newton's second law of motion; and apply Newton's second law to determine the weight of an object.

Newton's three laws are deceptively simple, but they are the underpinning of all of physics and govern the mechanics all of your actions in everyday life. Take an in-depth look at these laws in this learning module.