Static Electricity of Scotch Tape Lab

Materials:

4 Pieces of Scotch Tape (about 10 - 15 cm long each)

Instructions on how to prepare and label your tapes:

1.  Fold over an end of the tape which will be your "handle".

2.  Label the end of each tape with a pen. 

Label one piece (D1) - Desk 1

Label one piece (D2) - Desk 2

Label one piece (T) - Top

Label one piece (B) - Bottom

Procedure Part I:

1.  Place the two pieces labeled (D1 and D2) on the desk so that they are sticky-side-down on the desk.  They should be sitting side-by-side on your desk, but not touching each other.

2.  Quickly rip them off the desk (have one in one of your hands, and the other in your other hand) and answer the following questions.

Questions for (D1) and (D2) Tapes:  (You need to write these numbers on a separate sheet of paper and turn it in)

1.  Hold the tapes in your hands and bring their non-sticky sides close together.  Do the non-sticky sides REPEL or ATTRACT each other?  ____________

2.  Hold the tapes in your hands and bring their sticky sides close together.  Do the sticky sides REPEL or ATTRACT each other?  ____________

3.  Hold the tapes in your hands and bring the sticky side of one close together with the non-sticky side of the other.  Do these sticky/non-sticky  sides REPEL or ATTRACT each other?  ____________

4.  Do the tapes want to REPEL or ATTRACT your hand?  _____________

5.  Based on what you have seen in this lab so far and what you know about like charges repelling each other and opposite charges attracting, Circle the following items that have the same charge as each other.  Put a box around the item that has the opposite charge.  

Item #1:  D1

Item #2:  D2

Item #3:  Your body

6.  Based on what you have seen in this lab:  True or False:  The sticky side of a piece of tape has the same charge as the non-sticky side.  _________________

7.  Based on what you have seen in this lab:  True or False:  Your body has the opposite charge to that of the tape__________________

Procedure Part II:

1.  Place the tape labeled (B) on the desk.  Place the sticky side of the tape labeled (T) on top of (B).  In other words, (B) is on the table, and (T) is on top of (B).

2.  Pull (B) off the table so that (B) and (T) remain stuck together.

3.  While (B) and (T) are still stuck together, touch both (B) and (T) with your fingers many times to get rid of any charge that might be on them.

4.  Rip (B) and (T) apart as quickly as you can.  This will put a charge on both (B) and (T).

Questions for (B) and (T) Tapes:  (You need to write these numbers on a separate sheet of paper and turn it in)

8.  Hold the tapes in your hands and bring their non-sticky sides close together.  Do the non-sticky sides REPEL or ATTRACT each other?  ____________

9.  Hold the tapes in your hands and bring their sticky sides close together.  Do the sticky sides REPEL or ATTRACT each other?  ____________

10.  Hold the tapes in your hands and bring the sticky side of one close together with the non-sticky side of the other.  Do these sticky/non-sticky  sides REPEL or ATTRACT each other?  ____________

11.  Do the tapes want to REPEL or ATTRACT your hand?  _____________

12.  Based on what you have seen in this lab so far and what you know about like charges repelling each other and opposite charges attracting, Circle the following items that have the same charge as each other.  Put a box around the item that has the opposite charge.  (If you find that an item has both charges - positive AND negative - circle it AND put a box around it)

Item #1:  B

Item #2:  T

Item #3:  Your body

13.  Based on what you have seen in this lab:  True or False:  The sticky side of the (B) piece of tape has the same charge as the non-sticky side.  _________________

14.  Based on what you have seen in this lab:  True or False:  Your body has the opposite charge to that of the (B) tape__________________  True or False:  Your body has the opposite charge as that of the (T) Tape ________

Procedure Part III:

1.  Now we are going to try to figure out what charges we have on each one of these tapes.  I want you to prepare one of your (D) tapes as you did in Procedure Part I.  I want you to prepare the (B) and (T) tapes as you did in Procedure Part II.

Questions for (D),  (B) and (T) Tapes:  (You need to write these numbers on a separate sheet of paper and turn it in)

15.  Bring (D) and (B) close together.  Do they REPEL or ATTRACT  ______________

16.  Bring (D) and (T) close together.  Do they REPEL or ATTRACT _______________

17.  Which two tapes have the exact same charge  ________________

18.  Which two tapes have the opposite charge _____________

19.  Bring (D) close to your body.  Does it REPEL or ATTRACT __________

20.  Bring (B) close to your body.  Does it REPEL or ATTRACT __________

21.  Bring (T) close to your body.  Does it REPEL or ATTRACT __________

22.  True or False:  Your body will attract both positive and negative charges ___________

Procedure Part IV:

1.  We can use an ordinary balloon to determine the charge on the tapes.  Rubber balloons pick up electrons very easily.  (they become negative when they pick up electrons).  Rub a balloon on your hair until it becomes statically charged.

Questions for the Balloon:

23.  What is the charge on the balloon after you rub it through your hair  POSITIVE or NEGATIVE _______

24.  What is the charge on your hair after the comb went through it POSITIVE or NEGATIVE ______

25.  Bring the balloon next to the (D) labeled tape.  Does it REPEL or ATTRACT __________

26.  What is the charge on the (D) tape?  POSITIVE or NEGATIVE _____________

27.  What is the charge on the (B) tape?  POSITIVE or NEGATIVE _____________

28.  What is the charge on the (T) tape?  POSITIVE or NEGATIVE ____________

WHAT IS DUE FOR THIS LAB?

1. A separate piece of paper with the answers to questions #1-28