1. A LEAF ELECTROSCOPE

2. Insulating rubber stopper
A LEAF ELECTROSCOPE
Insulating rubber stopper
Knob
Gold Leaves
case

3. A LEAF ELECTROSCOPE The electroscope starts out neutral
This means there are an equal number of electrons and protons

4. Rubber rod
We will charge this electroscope net negative using a negatively charged rubber rod.
As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves.

5. Rubber rod
We will charge this electroscope net negative using a negatively charged rubber rod.
As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves.

6. Rubber rod
We will charge this electroscope net negative using a negatively charged rubber rod.
As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves.

7. Rubber rod
We will charge this electroscope net negative using a negatively charged rubber rod.
As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves.

8. Rubber rod
We will charge this electroscope net negative using a negatively charged rubber rod.
As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves.

9. Rubber rod
We will charge this electroscope net negative using a negatively charged rubber rod.
As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves.

10. Rubber rod
We will charge this electroscope net negative using a negatively charged rubber rod.
As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves.

11. Rubber rod
We will charge this electroscope net negative using a negatively charged rubber rod.
As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves.

12. Rubber rod
We will charge this electroscope net negative using a negatively charged rubber rod.
As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves.

13. Rubber rod
We will charge this electroscope net negative using a negatively charged rubber rod.
As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves.

14. Rubber rod
We will charge this electroscope net negative using a negatively charged rubber rod.
As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves.

15. Rubber rod
We will charge this electroscope net negative using a negatively charged rubber rod.
As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves.

16. Rubber rod
We will charge this electroscope net negative using a negatively charged rubber rod.
As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves.

17. Rubber rod
We will charge this electroscope net negative using a negatively charged rubber rod.
As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves.

18. Rubber rod
We will charge this electroscope net negative using a negatively charged rubber rod.
As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves.

19. Rubber rod
We will charge this electroscope net negative using a negatively charged rubber rod.
As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves.

20. Rubber rod
We will charge this electroscope net negative using a negatively charged rubber rod.
As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves.

21. Rubber rod
We will charge this electroscope net negative using a negatively charged rubber rod.
As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves.

22. Rubber rod
We will charge this electroscope net negative using a negatively charged rubber rod.
As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves.

23. Rubber rod
We will charge this electroscope net negative using a negatively charged rubber rod.
As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves.

24. Rubber rod
We will charge this electroscope net negative using a negatively charged rubber rod.
As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves.

25. Rubber rod
We will charge this electroscope net negative using a negatively charged rubber rod.
As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves.

26. Rubber rod
We will charge this electroscope net negative using a negatively charged rubber rod.
As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves.

27. Rubber rod
We will charge this electroscope net negative using a negatively charged rubber rod.
As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves.

28. Rubber rod
We will charge this electroscope net negative using a negatively charged rubber rod.
As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves.

29. Rubber rod
We will charge this electroscope net negative using a negatively charged rubber rod.
As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves.

30. Rubber rod
We will charge this electroscope net negative using a negatively charged rubber rod.
As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves.

31. Rubber rod
We will charge this electroscope net negative using a negatively charged rubber rod.
As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves.

32. Rubber rod
We will charge this electroscope net negative using a negatively charged rubber rod.
As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves.

33. Rubber rod
We will charge this electroscope net negative using a negatively charged rubber rod.
As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves.

34. Rubber rod
We will charge this electroscope net negative using a negatively charged rubber rod.
As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves.

35. Rubber rod
We will charge this electroscope net negative using a negatively charged rubber rod.
As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves.

36. Rubber rod
We will charge this electroscope net negative using a negatively charged rubber rod.
As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves.

37. Rubber rod
We will charge this electroscope net negative using a negatively charged rubber rod.
As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves.
Richard J. Terwilliger
April 2001
Created by

38. by Richard Terwilliger
Rubber rod
We will charge this electroscope net negative using a negatively charged rubber rod.
As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves.
by Richard Terwilliger

39. Rubber rod
We will charge this electroscope net negative using a negatively charged rubber rod.
As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves.

40. Rubber rod
We will charge this electroscope net negative using a negatively charged rubber rod.
As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves.

41. Rubber rod
We will charge this electroscope net negative using a negatively charged rubber rod.
As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves.

42. Rubber rod
We will charge this electroscope net negative using a negatively charged rubber rod.
As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves.

43. Rubber rod
We will charge this electroscope net negative using a negatively charged rubber rod.
As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves.

44. Rubber rod
We will charge this electroscope net negative using a negatively charged rubber rod.
As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves.

45. Rubber rod
We will charge this electroscope net negative using a negatively charged rubber rod.
As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves.

46. Rubber rod
We will charge this electroscope net negative using a negatively charged rubber rod.
As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves.

47. Rubber rod
We will charge this electroscope net negative using a negatively charged rubber rod.
As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves.

48. Rubber rod
We will charge this electroscope net negative using a negatively charged rubber rod.
As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves.

49. Rubber rod
We will charge this electroscope net negative using a negatively charged rubber rod.
As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves.

50. Rubber rod
We will charge this electroscope net negative using a negatively charged rubber rod.
As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves.

51. Rubber rod
We will charge this electroscope net negative using a negatively charged rubber rod.
As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves.

52. Rubber rod
We will charge this electroscope net negative using a negatively charged rubber rod.
As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves.

53. Rubber rod
We will charge this electroscope net negative using a negatively charged rubber rod.
As the negatively charged rod approaches the knob of the electroscope, the electrons in the knob are repelled and move down into the leaves.
REPLAY

54. The knob of the electroscope lost electrons.
Rubber rod
The knob of the electroscope lost electrons.
Therefore the knob is now net positive and the leaves are net negative
The leaves repel each other and spread apart F es
The leaves gained the electrons.

55. What would happen if the rod is taken away?
Rubber rod
The electroscope hasn’t lost or gained electrons so it is still neutral.
What would happen if the rod is taken away?
What would happen if the rod is taken away?

56. Rubber rod
The electroscope hasn’t lost or gained electrons so it is still neutral.
The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope.

57. Rubber rod
When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.
The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope.

58. Rubber rod
When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.
The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope.

59. Rubber rod
When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.
The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope.

60. Rubber rod
When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.
The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope.

61. Rubber rod
When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.
The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope.

62. Rubber rod
When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.
The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope.

63. Rubber rod
When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.
The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope.

64. Rubber rod
When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.
The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope.

65. Rubber rod
When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.
The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope.

66. Rubber rod
When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.
The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope.

67. Rubber rod
When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.
The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope.

68. Rubber rod
When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.
The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope.

69. Rubber rod
When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.
The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope.

70. Rubber rod
When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.
The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope.

71. Rubber rod
When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.
The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope.

72. Rubber rod
When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.
The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope.

73. Rubber rod
When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.
The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope.

74. Rubber rod
When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.
The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope.

75. Rubber rod
When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.
The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope.

76. Rubber rod
When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.
The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope.

77. Rubber rod
When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.
The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope.

78. Rubber rod
When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.
The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope.

79. Rubber rod
When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.
The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope.

80. Rubber rod
When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.
The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope.

81. Rubber rod
When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.
The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope.

82. Rubber rod
When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.
The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope.

83. Rubber rod
When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.
The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope.

84. Rubber rod
When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.
The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope.

85. Rubber rod
When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.
The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope.

86. Rubber rod
When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.
The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope.

87. Rubber rod
When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.
The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope.

88. Rubber rod
When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.
The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope.

89. Rubber rod
When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.
The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope.

90. Rubber rod
When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.
The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope.

91. Rubber rod
When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.
The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope.

92. Rubber rod
When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.
The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope.

93. Rubber rod
When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.
The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope.

94. Rubber rod
When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.
The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope.

95. Rubber rod
When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.
The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope.

96. Rubber rod
When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.
The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope.

97. Rubber rod
When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.
The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope.

98. Rubber rod
When the rubber rod makes contact with the knob of the electroscope some of the electrons in the rod transfer into the knob.
The electrons in the rubber rod are attracted to the NET POSITIVE knob of the electroscope.

99. We will now remove the rubber rod
The electroscope has GAINED electrons.
The electroscope is now NET NEGATIVE.
We will now remove the rubber rod

100. The electroscope has GAINED electrons.
Rubber rod
The electroscope has GAINED electrons.
The electroscope is now NET NEGATIVE.

101. The electroscope has GAINED electrons.
Rubber rod
The electroscope has GAINED electrons.
The electroscope is now NET NEGATIVE.

102. The electroscope has GAINED electrons.
Rubber rod
The electroscope has GAINED electrons.
The electroscope is now NET NEGATIVE.

103. The electroscope has GAINED electrons.
Rubber rod
The electroscope has GAINED electrons.
The electroscope is now NET NEGATIVE.

104. The electroscope has GAINED electrons.
Rubber rod
The electroscope has GAINED electrons.
The electroscope is now NET NEGATIVE.

105. The electroscope has GAINED electrons.
Rubber rod
The electroscope has GAINED electrons.
The electroscope is now NET NEGATIVE.

106. The electroscope has GAINED electrons.
Rubber rod
The electroscope has GAINED electrons.
The electroscope is now NET NEGATIVE.

107. The electroscope has GAINED electrons.
Rubber rod
The electroscope has GAINED electrons.
The electroscope is now NET NEGATIVE.

108. The electroscope has GAINED electrons.
Rubber rod
The electroscope has GAINED electrons.
The electroscope is now NET NEGATIVE.

109. The electroscope has GAINED electrons.
Rubber rod
The electroscope has GAINED electrons.
The electroscope is now NET NEGATIVE.

110. The electroscope has GAINED electrons.
Rubber rod
The electroscope has GAINED electrons.
The electroscope is now NET NEGATIVE.

111. The electroscope has GAINED electrons.
Rubber rod
The electroscope has GAINED electrons.
The electroscope is now NET NEGATIVE.

112. The electroscope has GAINED electrons.
Rubber rod
The electroscope has GAINED electrons.
The electroscope is now NET NEGATIVE.

113. The electroscope has GAINED electrons.
Rubber rod
The electroscope has GAINED electrons.
The electroscope is now NET NEGATIVE.

114. The electroscope has GAINED electrons.
Rubber rod
The electroscope has GAINED electrons.
The electroscope is now NET NEGATIVE.

115. The electroscope has GAINED electrons.
Rubber rod
The electroscope has GAINED electrons.
The electroscope is now NET NEGATIVE.

116. The electroscope has GAINED electrons.
Rubber rod
The electroscope has GAINED electrons.
The electroscope is now NET NEGATIVE.

117. The electroscope has GAINED electrons.
Rubber rod
The electroscope has GAINED electrons.
The electroscope is now NET NEGATIVE.

118. The electroscope has GAINED electrons.
Rubber rod
The electroscope has GAINED electrons.
The electroscope is now NET NEGATIVE.

119. The electroscope has GAINED electrons.
Rubber rod
The electroscope has GAINED electrons.
The electroscope is now NET NEGATIVE.

120. The electroscope has GAINED electrons.
Rubber rod
The electroscope has GAINED electrons.
The electroscope is now NET NEGATIVE.

121. The electroscope has GAINED electrons.
Rubber rod
The electroscope has GAINED electrons.
The electroscope is now NET NEGATIVE.

122. The electroscope has GAINED electrons.
Rubber rod
The electroscope has GAINED electrons.
The electroscope is now NET NEGATIVE.

123. The electroscope has GAINED electrons.
Rubber rod
The electroscope has GAINED electrons.
The electroscope is now NET NEGATIVE.