Homeroom:
FLEX PLAN FOR WEEKLY HOMEROOM RESPONSIBILITIES. YOU MUST:
COMPLETE 2 DAYS OF SSR IN HOMEROOM PER WEEK.
USE THREE DAYS FOR CLASS WORK AND PREPARATION.
YOU MAY ENGAGE IN COMMUNITY SERVICE AS SHOWN BELOW
CLASSROOM SUPPORT - COMMUNITY SERVICE OPPORTUNITY
TO SIGN UP - SEE ME.
We will have an SEL Discussion with Ms. Steffon today
Do Now:
Homework to be completed:
Quiz on Electric Forces Friday, January 6th
(This is the 12/16 Do Now assignment in GC)
Rocketman wrap-up due friday, January 6th
magnetism
MHGr7 Ch10 Magnetism
Today’s agenda:
Triboelectric series and Induced Charge
Demonstrate phenomenon
Explain - diagram on board - students take notes
Triboelectric series - list order of materials that tend to give up charge or gain charge through contact.
Donors - give electrons up and become positively charged
Gainers - take electrons through adhesion and become negatively charged
Induced Charge - When the electrons move out of an area and leave an unbalanced positive charge
Happens in conductors
conductors - materials that allow electrons to move through them freely
metals
Does not happen in insulators
insulator - materials that resist the movement of electrons
Metal objects acquire positive and negative poles
Rub balloon on hair
Balloon takes electrons through adhesion
becomes negatively charge.
Placed near a metal can - electrons (negative charges)are pushed to opposite side.
can now has a positive and negative poles
opposites attract
can is pulled toward the balloon