The science guy explains the mechanics of momentum and explains how weight and speed affect momentum. Illustrates how velocity is related to an object's momentum and presents examples and experiments to illustrate momentum. Demonstrates how rockets are propelled, how soap box racers accelerate, and how crash test dummies are used in automobile safety belt research.

Award-winning series explores the world of science and nature using humor, music, experiments, and interviews with scientists. DVD features fully indexed chapters correlated to National Science Standards, downloadable teacher's guide, interactive glossary and quiz, Internet links, and bonus materials.

1. Big idea -- 2. Way cool scientist : safety engineer -- 3. Big demo : rockets in space -- 4. Try this! : balloon on a string -- 5. Music video.