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Examples of Teaching with Demonstrations


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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).

Subject: Geoscience:Geology:Historical Geology

Exploring Radiometric Dating with Dice part of Quantitative Skills:Activity Collection
An activity in which students use dice to explore radioactive decay and dating and make simple calculations.

Subject: Geoscience:Geology:Geochemistry:Radioisotopes, Mathematics

The nature of volcanism as controlled by viscosity part of Cutting Edge: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 ...

Subject: Geoscience:Geology:Igneous and Metamorphic Petrology:Igneous Processes, Volcanology

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.

Subject: Physics:General Physics:Vector Algebra

How Many Is A Million? part of Cutting Edge:Rates and Time:Visualizations with Teaching Notes
Roger Steinberg, Department of Natural Sciences, Del Mar College 5000 Dots by Computer (Click image to enlarge and download.)

Subject: Geoscience:Geology:Historical Geology

Demonstration of radioactive decay using pennies part of Quantitative Skills:Activity Collection
A demonstration (with full class participation) to illustrate radioactive decay by flipping coins. Shows students visually the concepts of exponential decay, half-life and randomness. Works best in large classes -- the more people, the better.

Subject: Geoscience:Geology:Geochemistry:Radioisotopes, Geoscience:Geology:Historical Geology

Crystallization Demonstration part of Pedagogy in Action:Library:Interactive Lecture Demonstrations:Examples
This demonstration uses melted phenyl salicylate to show how crystals nucleate and grow as the temperature of the liquid melt decreases.

Subject: Geoscience:Geology:Igneous and Metamorphic Petrology:Igneous Processes, Geoscience:Geology:Mineralogy:Crystal Chemistry

Water Contamination Demonstration part of Pedagogy in Action:Library:Interactive Lecture Demonstrations:Examples
Summary: Misplaced Matter and Water Pollution The drinking water pollution demonstration provides a very simple but dramatic way to get students to think about water contamination and drinking water standards, ...

Subject: Geoscience:Hydrology

Copper Extraction Demonstration part of Pedagogy in Action:Library:Interactive Lecture Demonstrations:Examples
Summary This demonstration uses sulfuric acid and crushed copper ore (malachite) to produce a solution of copper sulfate and carbonic acid in a beaker. When a freshly sanded nail is dropped into the copper sulfate ...

Subject: Geoscience:Geology:Mineralogy:Systematic Mineralogy:Native Elements, Environmental Science:Waste:Toxic and Hazardous Wastes:Metals, Geoscience:Geology:Mineralogy:Systematic Mineralogy:Oxides and Hydroxides, Geoscience:Geology:Geochemistry:Aqueous Solutions, Environmental Science:Mineral Resources:Mining

Adhesion, Cohesion, and Surface Tension Demonstration part of Pedagogy in Action:Library:Interactive Lecture Demonstrations: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