Comparing the Specific Heat of Metals I
Comparing the Specific Heat of Metals II
Paramagnetism of Transition Metal Salts
Computer NaCl Crystal Cleavage
Octahedral, Hexagonal, and Tetrahedral Shapes
Thermoluminescent Sodium Chloride
Jars of Sand Representing Electron Flow in a Band
Temperature Dependence on Resistance
Thermal Conductivity of Metals
Glycerine Tube Representing Hole Energies
Counting Photons Using a Solar Cell
Effect of Pressure on the Melting Point of Ice
Fixed Ball and Stick Crystal Models
Jars of Sand Representing Electron Flow In A Band
Description: These jars are filled with different amounts of sand. Sand will only move in the jar that is partially filled. This can be compared to electrical conductivity since electricity flows in partially filled bands.
This demonstration is also available on JCE Solid State Resources CD-ROM
Source: Ellis, A. et al. Teaching General Chemistry: A Material Science Companion
Year: 1993 Vol: N/A Page: 193
Keywords: Sand, Conductivity, Bands, Display, Population, Holes, Electrons
Rating: 
Hazard: Low
- No toxic chemicals in use
- Display
Effectiveness: Average
- Good connection from demo to course material
- Results are only observable with guidance
- Time to results is low
- No effects are seen by audience
Difficulty: Low
- Display
- No procedures are needed
- No manipulations are required
Safety Precautions:
- Eye protection required
Class: Macromolecules and Solid State Chemistry, Simulation
Division: Solid State Chemistry, Physical Chemistry