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Quiz Thursday so Do Now

Explore the differences between positively and negatively charged electroscopes through grounding, induction, conduction, and polarization. Learn how electrons flow and objects get charged by various methods to enhance your scientific knowledge.

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Quiz Thursday so Do Now

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  1. Quiz Thursday so Do Now • Draw a picture of a “charged” electroscope… the ones we have been looking at had two thin metal strips hanging down… • Can you tell the difference between a positively charged electroscope and a negatively charged electroscope by looking at it?

  2. Grounding - - - - - • Since the Earth is very large it can neutralize: • negative objects byABSORBINGelectrons • positive objects by RELEASING electrons + + + + RULE #2 – GROUNDING MAKES AN OBJECT NEUTRAL - - - Grounding Symbol: -

  3. Induction – Negative Rod Induction – movement of charge without contact - - RULE #3 – ELECTRONS FLOW TOWARD LESS NEGATIVE/MORE POSTIVE AREAS - 1 3 - - - - - - - - - - - - - - - - + - - + + - - + - - - - - + - ANIMATE NEXT 2 + -

  4. Induction – Positive Rod Induction – movement of charge without contact - - - RULE #4 – INDUCTION = POLARIZATION 3 1 - + + + + + + + - - - - + - - + + - - + - - - - - - - - + - ANIMATE NEXT 2 - +

  5. Conduction – Negative Rod Conduction – movement of charge with contact RULE #5 – CHARGING BY CONDUCTION GIVES SAME CHARGE 1 - - - - - - - - - - - - - - - - - - - + - - + e- - ANIMATE NEXT 2 3 - -

  6. Conduction – Positive Rod Conduction – movement of charge with contact - - - RULE #5 – CHARGING BY CONDUCTION GIVES SAME CHARGE 1 + + + + + + + + + - - + - - + - - - e- + ANIMATE NEXT 2 3 + +

  7. 2nd Period

  8. The Electroscope UNCHARGED CHARGED - - LEAVES

  9. Induction – Negative Rod - e- e- - - - - - - - - - - - - 1 3 + e- - - RULE #4 2 + - - ANIMATE NEXT

  10. Induction – Positive Rod - e- e- + + + + + + + + + 3 1 - e- + + RULE #4 2 + + - ANIMATE NEXT

  11. Charging by Conduction – Negative Rod e- e- e- e- 1 5 - - - - - - - - - - - - - 2 - - - - - - - - - RULE #5 - - - ANIMATE NEXT 3 4

  12. Charging by Conduction – Positive Rod e- e- e- e- 5 1 - + + + + + + + + + 2 - + + + - + - + + RULE #5 + + + ANIMATE NEXT 3 4

  13. Charging by Induction – Negative Rod e- e- e- e- - - - - - - - - - - - - - 6 4 5 2 1 3 + + + + + + + + + RULE #6 + + + ANIMATE NEXT

  14. Charging by Induction – Positive Rod e- e- RULE #6 – CHARGING BY INDUCTION GIVES OPPOSITE CHARGE e- e- - + + + + + + + + + 6 4 2 1 3 5 - - - - - - - - - RULE #6 - - - ANIMATE NEXT

  15. End of 5.1.2 - PRACTICE

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