Rubbing silk on a glass rod makes the glass positive and the silk negative. Rubbing fur on a hard rubber rod makes the hard rubber negative and the fur positive. Whenever two different materials rub against each other it is likely that one will leave with more electrons than it started with and the other will leave with less. This effect is known as "triboelectricity," from the Greek "tribein," or "to rub".
1.What is a triboelectric series?
2. Give two examples of materials that are more likely to give up electrons, and two examples of materials that are more likely attract electrons.
3.Which material is neutral in the triboelectric series?
A single stroke of lightning can heat the air around it to 30,000 degrees Celsius (54,000 F)! This extreme heating causes the air to expand at an explosive rate creating a shock wave that turns into a booming sound wave, the thunder.
8. Explain why there is a time difference between the sight of lightning and the sound of thunder?