Welcome to the "Old School Science Demonstration!" website.
Physical Science Demo: Liquid Flax (Educator Explanation)
Physical Science Demo: Liquid Flax
A simple density activity/lesson that demonstrates items can sink or float in materials other than water. (Density is the amount of stuff (matter) in an object. Density = mass/volume (d = m/v))
**Bonus Video: More Liquid Flax**
Lesson Plan: PDF
Demo Card: PDF
PS Demo: Tablecloth vs Inertia (1st Law of Motion)
Physical Science Demonstration: Soda Pop Density
Corpus Callosum Demonstration
An interesting activity used to test if the corpus callosum (the part of the brain that connects the right and left hemispheres) is connected. Your students/kids will love this one!
Related Video - Scientific American Frontiers: The Man With Two Brains
- Click PIECES OF MIND Episode 703
Lesson Plan: Watch the Video Lesson Above
Demo Card: PDF Version
Brain PowerPoint: PPT version
Bernoulli's Ball (Explaining Lift Force Only, not Addition of Vector Forces in this Demo)
This is a twist of the classic Ping-Pong ball/hairdryer demonstration used to show Bernoulli's Principle. A leaf blower replaces the hairdryer, and a beach ball replaces the Ping-Pong ball. This is amazing to watch.
This is a classic demonstration of Bernoulli’s Principle. Note: For both A. and B. (below) – gravity/weight provides a downward force, and the dryer/blower is providing an upward force. There are two primary explanations for this demonstration. A.) There is a moving stream of air traveling around the ball, resulting in an area of less pressure. The ball is prevented from falling out of the moving stream of air because it is pushed in by the higher-pressured air adjacent to the moving stream of air. B.) The air travels around the ball (Coanda Effect) and is moving at the greatest velocity at the top of the ball, resulting in an area of low pressure above the ball (lift). The ball is drawn toward the area of low pressure. This area of low pressure can be disturbed by placing a hand above the ball. Explanation B is shown in this video.