Have you ever wondered about how waves work, and what the difference is between how a sound wave and a light wave travel?
The Triboelectric Effect provides a number of safe, quick and easy easy experiments to help students understand electrical 'charge'.
The polarity and strength of the charges produced differ according to the materials, surface roughness, temperature, strain, and other properties.
The triboelectric effect is not very predictable, and only broad generalizations can be made
Triboelectric Series Data A detailed table of Triboelectric series data
Also, useful information here:
To explain the cause of the interaction between a charged object (either positively or negatively charged) and a neutral aluminum drink can: