Your Safer Source for Science

Since 1977


P.O. Box 219 Batavia, IL 60510

Phone 800-452-1261
Fax 866-452-1436

Pressure Paradox—Demonstration Kit

By: The Flinn Staff

Item #: AP6301

Price: $21.60

In the Pressure Paradox Demonstration Kit for physical science and physics, determine if a small steel ball is heavier than a large foam ball. A perfect activity to discuss pressure and density.

See more product details

Product Details

What does pressure feel like? In this activity, students hold a small steel ball in one hand and a large foam ball in the other to answer the question—which one is heavier? Students quickly conclude that the small steel ball is heavier. However, when they weigh each ball with a balance, they learn the truth—the large foam ball weighs more. How could this be? Students have misinterpreted their sense of touch as a gauge for weight, when, in actuality, this feeling is a result of pressure. A perfect activity to discuss pressure and density.

Enough materials for five groups of students are provided.