# Examples of Teaching with Demonstrations

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Elastic and Inelastic Collisions: The Case of the Happy and Sad Balls part of Examples

Interactive Lecture Demonstration to illustrate that impulses are larger in elastic collisions than in inelastic collisions if other factors are the same.

The Magic of Optics: Now you see it, now you don't part of Examples

A magical demonstration where a Pyrex tube vanishes in a beaker of mineral oil. Useful demonstration to introduce to concept of refraction (and/or partial reflection).

Properties of Electrostatic Charge: Interactive Lecture Demonstration part of Examples

This activity is an interactive lecture demonstration format which can be used to teach the first lesson of electrostatics. Students will investigate conservation of charge, charge by contact, polarization of charge and charge by induction.

Introduction to Work and Energy: The Hopper Popper Surprise part of Examples

Understanding the Motion of a Harmonic Oscillator part of Examples

This inteactive lecture and series of demonstrations develops the concepts and vocabulary of oscillatory motion as it relates to the motion of a mass on a spring.

Helping Students Discover Total Internal Reflection part of Pedagogy in Action:Library:Interactive Lectures:Examples

Students learn the basic relationship of Snell's Law, practice applying it to a situation, then are given another situation where it "doesn't work."??? This situation turns out to be one in which total internal reflection occurs. Students are then shown what happens with classroom apparatus.

Vectors: Lifting a Bowling Ball part of MnSCU Partnership:PKAL-MnSCU Activities

Compare lifting a bowling ball directly (one small person) to lifting a bowling ball at an angle with two people holding the ends of a rope and the ball hooked to the middle of the rope.

Using Popcorn to Simulate Radioactive Decay part of Quantitative Skills:Activity Collection

Popping popcorn in your class is an excellent way to illustrate both the spontaneity and irreversible change associated with radioactive decay. It helps students to understand the unpredictability of decay.

M&M Model for Radioactive Decay part of Quantitative Skills:Activity Collection

A tasty in-class demonstration of radioactive decay using two colors of M&M's. Illustrates the quantitative concepts of probability and exponential decay. This activity is appropriate for small classes (<40 students).

The nature of volcanism as controlled by viscosity part of Cutting Edge:Courses:Petrology:Teaching Examples

This activity is fun to include in a classroom. This activity has the students design demonstrations using ketchup and peanut butter to document how viscosity differences between rhyolite and basalt control various ...