1. Part 2 of the Static Electricity lab Determining what charge is on the rod or strip

2. Using a Negatively charged Electroscope

3. + + + + + + + - - - - - - Negative Charge by Conduction Negative rod makes contact - - - - - - - - - + + - - -

4. + + + + + + + - - - - - - - + + + - + + + + - - - - - - - - - - - - - - - - - - - Electrons are added Creates a Bridge Like charges repel Leaves become negative - - - - - - - - - + + - -

5. + + + + + + + - - - - - - - + + + + - - - - - - - - - - - - - - - - - - Permanent Negative Charge Remove Negative Rod Like charges still repel Leaves stay negative

6. + + + + + + + - - - - - - - + + + + - - - - - - - ---- - - - - - - - - - - - Leaves spread further apart Leaves become more negative - More Electrons move down to leaves -- Negative rod comes near - - - - - - - - + + + - -

7. + + + + + + + - - - - - - - + + + + - - - - - - - - - - - - - - - - - - - Remove Negative Rod Leaves spread less apart Leaves become less negative

8. + + + - - - - - - ++ ++ - - - - - - - - - - - - - - - - - - - - + + + Positive rod brought near Electrons move up to sphere Leaves become neutral And start to fall or collapse

9. Part 3 of the Static Electricity lab Determining what charge is on the rod or strip

10. Using a Positively charged Electroscope

11. + + + + + + + - - - - - - - Positive Charge by Conduction Positive rod makes contact - + + +

12. + + + + + + + - - Electrons are removed Creates a bridge Like charges repel Leaves become positive - + + + - - -

13. + + + + + + + - - - - - + + + Positive rod brought near Electrons move up to sphere Leaves become more positive Leaves spread further apart

14. + + + + + + + - - Leaves spread less apart Leaves become less positive - - Remove positive rod

15. + + + ++ ++ - - Leaves become neutral - - And start to fall or collapse Electrons move down to leaves - - + + + - - - - - - - Negative rod comes near