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3. 100 200 400 300 400 Charges Electrostatics Methods of charging Properties 300 200 400 200 100 500 100

4. Row 1, Col 1 Positive What is the charge of the nucleus of an atom?

5. 1,2 False: Electrical forces are weakest when charges are far apart. Electrical forces between charges are weakest when the charges are close together. True or False?

6. 1,3 … Using friction, electrons Are stripped off of the fur And placed on the pipe. One of the methods for charging an object is through the use of friction. Describe how one makes the white PVC pipe negative with the fur.

7. 2,1 The electrons are tightly bound to The atom’s nucleus. The electrons are NOT free to roam in the material. What makes a material a good insulator?

8. 2,1 Because the protons are STUCK in The nucleus, and the electrons Are located on the outside of nucleus, where they are able to move. When we describe charge transferring or rearranging, why is it the electrons only being described?

9. 2,2 This is called charging by induction. The electrons in the neutral pith ball rearrange and go toward the positive rod (since opposite charges attract) and the positive rod stays the same. The neutral pith ball is still neutral overall, just is polarized temporarily. Describe and illustrate (draw) what happens when a positive rod is brought near a neutral pith ball.

10. 2,3 Conduction! (Or Charging by Contact) When a charged object is brought near and touches another neutral object, the neutral object becomes charged. We call this charging by______________.

11. 2,4 True! This is known as the Conservation of Electric Charge. True or False: Electric charge can never be created nor destroyed, but electric charge can be transferred.

12. 2,1 The electrons are negative and The protons are positive and therefore, They attract one another. What force do protons and electrons apply to one another?

13. 3,1 Like charges repel, And opposite (or unlike) charges attract. Fill in the blanks: Like charges__________, And opposite (or unlike) charges ____________.

14. 3,2 The object must be positively charged When an object is placed near a positively charged electroscope, the leaves diverge (go further apart). What charge is the object?

15. 3,3 A charged object is brought Near to a neutral object. The neutral object experiences A rearrangement of electrons, either going toward the positive object, Or going away from the negative object. Describe what happens when an object is charged temporarily by induction.

16. 3,4 When an object becomes positively charged, it is because it has gained positive protons. True or False? FALSE! An object becomes positively charged when it loses electrons!

17. 4,1 The object is either Positive or Neutral. If a negatively charged PVC pipe attracts another object, then what can you say about the charge of the other object?

18. 4,2 The leaves are both the same charge, And same charges repel. When an electroscope is charged, the leaves go apart. Why?

19. 4,3 The protons do not move, and some of the Electrons will move from the neutral pith ball to the positive rod, leaving both Objects positive and repelling one another. Suppose a positively charged rod is brought near and touches a neutral pith ball. Describe what happens to the protons and electrons.

20. 4,4 Protons = positive = located in nucleus Neutrons = neutral = located in nucleus Electrons = negative = located outside of nucleus List the three types of sub- atomic particles in an atom, the charge of each, and their location.

21. 5,1 Your hair becomes positively charged. Through friction, electrons Are transferred from your hair to the comb. Your hair becomes positively charged as it Loses electrons. When you comb your hair, the comb becomes negatively charged. Describe what happens to your hair?

22. 5,2 Polarized means that the electrons and protons rearrange to opposite ends; Therefore, the object is temporarily experiencing one side as being positive and the other side as being negative. During induction we say that the neutral object is polarized temporarily. Describe what “polarized” means.

23. 5,3 A positive object touches a neutral object and some electrons transfer from the neutral object into the positive object. The result is two objects that are Both Positive. Describe and illustrate (draw) what happens when a neutral object is charged positively by conduction. What is the result?

24. 5,4 A negative object is brought near to a neutral object and some electrons rearrange in the neutral object going away from the negative object. The neutral object is grounded, and electrons leave through the ground connection. The result is the neutral object is now negatively charged. Describe and illustrate (draw) how to make a neutral object positive with a negative object?