2. Clothes tumble in the dryer and cling together, Shocks from a door knobs after walking across carpet, Sparks of electricity after pulling off clothes, Bolts of lightning across the sky, A bad hair day…

3.  Protons - found in the nucleus of atoms - positive charge  Neutrons - found in the nucleus of atoms - no charge  Electrons - found outside the nucleus - negative charge

4.  Electrons are removed and added to atoms  This process is the focus of static electricity

5. CONDUCTORSINSULATORS  Materials that allow electrons to transfer across the entire surface of an object  Materials that do not allow electrons to transfer across the surface of an object  The charge will remain at the location of charging

7.  The number of electrons that surround the nucleus will determine whether an atom is electrically charged or electrically neutral

8.  Positive - possesses more protons than electrons  Negative - possesses more electrons than protons  Neutral - equal number of protons and electrons

9.  Opposites Attract  Likes Repel

10.  Any charged object – positively charged or negatively charged – will have an attractive interaction with a neutral object  Example: Paper pieces

11. FORCE OF REPULSION 1 WAY FORCE OF ATTRACTION 2 WAYS  The only way that two objects can repel each other is if they are both charged with the same type of charge  One object is neutral and the other object is charged  Both objects are charged with opposite charges

12.  The process of separating opposite charges within an object  A charged object can cause electrons to move within an object so that one side is positive and the other side is negative  The object remains neutral

13.  Example

14.  Uncharging  Removing excess charge on an object by means of the transfer of electrons between it and another object of substantial size (your body, the earth, etc.)

15.  Rubbing an Object  Two objects have equal and opposite charges  Transfer occurs from the least electron- loving material to the most electron-loving material

16.  Charge the neutral object by contact with a charged object  Both objects have the same charge as the initial charged object

17.  Method to charge an object without actually touching the object to any other charged object  The object being charged receives a charge that is opposite that of the charged object

18. Positive ChargeNegative Charge

19.  Electrophorus

20.  Exist around any object carrying a charge  The direction of the electric field is always directed in the direction that a positive test charge would be pushed or pulled if placed in the space surrounding the source charge

21. Negative ChargePositive Charge

24.  Always extend from a positively charged object to a negatively charged object, from a positively charged object to infinity, or from infinity to a negatively charged object  Never cross one another  Are most dense around object with the greatest amount of charge

25.  Several electric field line patterns are shown in the diagrams below. Which of these patterns are incorrect?

26.  Consider the electric field lines shown in the diagram below. From the diagram, it is apparent that object A is ____ and object B is ____.

27.  Consider the electric field lines drawn at the right for a configuration of two charges. Several locations are labeled on the diagram. Rank these locations in order of the electric field strength - from smallest to largest. 