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# Examples of Teaching with Demonstrations

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An electrostatics puzzler part of Examples
An interactive lecture demonstration intended to help students use physics reasoning to predict the outcome of a puzzling electrostatics demonstration.

Subject: Physics, Electricity & Magnetism, Electricity & Magnetism:Electrostatics, Physics:Education Foundations:Alternative Conceptions, Physics:Education Practices:Active Learning

A simple motor/generator demonstration for use in interactive lecture part of Examples
This activity describes a simple clear demonstration of electric generators (Faraday's Law) and electric motors (Lorentz Force). This demonstration can be used as an interactive lecture demonstration.

Subject: Physics:Electricity & Magnetism:Magnetic Fields and Forces, Electromagnetic Induction, Physics:Electricity & Magnetism

Buoyancy and Archimedes Principle part of Examples
Summary Buoyancy is based on Archimedes' Principle which states that the buoyant force acting upward on an object completely or partially immersed in a fluid equals the weight of the fluid displaced by the ...

The Elliptic Orbit part of Examples
Planet motion around a star - introductory activity with interesting animation. The activity allows the student to revile the connection between the kinematics of planet and energy of the planet along the orbit.

Subject: Physics:Classical Mechanics:Motion in Two Dimensions, Gravity

Students predict the best graphical representation of US real GDP/capita during the last twenty years, choosing from graphs showing: cyclical decline, cyclical change with no net change, cyclical increase, or erratic wide fluctuations. Using actual US data, students graph real GDP/capita to find out the actual pattern: a rising series with periodic dips, not a flat series, a falling series, or a highly erratic series as students often predict. Students then reflect on why this pattern is often misunderstood and why it may not fully describe the well-being of the US population.

Subject: Economics:Macro

Thermal Conductivity Demonstrations part of Examples
Summary Here are three ideas for demonstrating thermal conductivity to your students. I. Heat flow down a metal rod (or rods) is timed by seeing wax melt at different locations along the rod. II. A rod made of ...

Convection Demonstration part of Examples
Summary This demonstration uses ** How to set up the demonstration How to do the demonstration Ideas for discussing the convection demonstration in class References and resources

Subject: Education

Pressure Melting of Ice: While-U-Wait part of Examples
In this demonstration, students get to witness pressure melting and regelation first-hand. A weight is suspended via a thin wire over an ice cube. Over the course of the course of the demonstration, the wire passess through the ice, leaving undamaged ice in its wake.

Subject: Physics, Geoscience:Hydrology

Adhesion, Cohesion, and Surface Tension Demonstration part of Examples
This short (<5-10 minutes) pair of demonstrations uses glass slides with a very thin film of water to demonstrate the cohesive and adhesive forces of water molecules, and a needle floating on water to demonstrate surface tension.

Subject: Geoscience:Hydrology

The unemployment rate for the class part of Examples
After predicting what the unemployment rate will be for students in the class, a confidential survey modeled on the Current Population Survey questions is used to gather data about each student's employment. Students use this data to measure the class unemployment rate and then assess its accuracy.

Subject: Economics:Macro