Ask these questions and expect to get replies but don’t let it go on too long. Be encouraging if someone says something daft try and be positive.
Here’s my silly demo. The balloon will rub against the head and then pull away with the “hair” standing on end. You might need to explain what it’s supposed to be. The next few slides show what is happening to the charges. These should run automatically.
Re iterate that the head an balloon each started off with the same number of positive and negative charges but the rubbing moved charges onto the balloon and off the head. The balloon is now negatively charged and the head positively charged so that because opposites attract the hairs are attracted to the balloon
![Homework from last class: ,[object Object],[object Object]](https://image.slidesharecdn.com/sci9lesson1april28-staticchargev3-0-110430093651-phpapp01/85/sci-9-lesson-1-april-28-static-charge-1-320.jpg)
![[object Object],[object Object],[object Object],[object Object]](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)