1. Electric Charge
Chapter 7.1

2. Charge Atoms are made up of: Positive protons Negative electrons
If the atom has same number of each, it is electrically neutral

3. Transferring charge Electrons are bound more tightly to some atoms
When surfaces are in contact sometimes electrons can transfer between the objects
Accumulation of excess electric charge = static electricity
Example: Rubbing the soles of your foot on the carpet transfers electrons to your foot

4. Conservation of Charge
Charge can be transferred from object to object, but it cannot be created or destroyed

5. Comparing Forces Electrical forces > gravitational forces
For protons and electrons
In real life, two objects have a greater gravitational force than electrical force since most objects are neutral
Electrical force directly proportional to charge of objects and inversely proportional square to the distance

6. Conductors & Insulators
Have electrons that are able to move easily
metals
Insulators
Have electrons that are not able to move easily
Wood, rubber, glass

7. Charging Objects Charging by contact
Rubbing two materials together resulting in transfer of electrons
One material becomes positive the other negative

8. Charging by Induction
When charged objects get close to neutral objects, they can cause the neutral object to rearrange the position of its’ electrons
No initial contact required to attract the objects