Electric Charges

LEARNING TARGET:

• I can use the terms attractive forces and repulsive forces to explain what a charge is.

HOWLs TARGET: 

• I treat all lab equipment with care.

AGENDA :

I. Warm-up: What are the musts for the lightbulb to light up? What are the energy transfers in your system?

II. Static Electricity

• What happens when you rub a balloon on your head and stick it to the wall?
• What is a charge?
• Electrotape investigation -stick two pieces of tape on a table and rub firmly. Gently lift them up and bring together to observe a charge
• PHET Balloon investigation: https://phet.colorado.edu/sims/html/balloons-and-static-electricity/latest/balloons-and-static-electricity_en.html
• Answer the following questions:
• 1.  Rub balloon on the sweater.  What charge is the balloon collecting?
• 2.  Bring balloon near sweater.  What happens?  Bring balloon near wall.  What happens.  Why does this happen in each situation?
• 3.  Hold the balloon straight up so string is straight.  Which object does the balloon move to?  Why does the balloon move towards this object instead of the other?

III. John Travoltage: https://phet.colorado.edu/sims/html/john-travoltage/latest/john-travoltage_en.html

• Answer the following questions:
• 1. Rub his foot on the rug then bring his finger near the door knob. Why does the electric charge move towards the door knob but not the wood door?
• 2. Is this demonstrating an attractive force or a repulsive force? Why? 
• 3. Why can't he "shock" himself?

HOMEWORK: None