1. Electrostatics

2. Electrostatics
The branch of science dealing with static charges and their electric fields
The Greek word for amber, ήλεκτρον electron, was the source of the word 'electricity'

3. Static Electricity

4. A little history
The science of electricity has its roots in observation, known in 600 BC that a piece of amber rubbed with animal fur would attract straw, feathers
Thales of Miletos (Greece) in credited with this discovery

5. What is amber?
Amber is the fossilized form of tree resin…not the same as sap.
Resin is similar to our scabs. It flows out of the tree to plug a hole.

6. Benjamin Franklin
1752 By tying a key onto a kite string during a storm, Ben Franklin , proved that static electricity and lightning were the same.

7. The Leyden Jar
Progress quickened after the Leyden jar was invented in 1745
The Leyden jar stored electricity and therefore could be studied at length

8. The Battery
A new interest in current began with the invention of the battery. Luigi Galvani had noticed (1786) that a discharge of static electricity made a frog's leg jerk.
Galvani thought the leg supplied electricity, but Alessandro Volta thought otherwise. He showed that the metal plate and the Leyden jar were different metals and produced a current. He built the voltaic pile, an early type of battery, as proof.

9. A quick review of the atom
positively
negatively
Electrons
Every atom has a ______ charged nucleus surrounded by ____ charged electrons.
_______ move in and out of fixed pathways around the nucleus

10. Charges
Two kinds: positive and negative (terms coined by Benjamin Franklin)
Like charges ________
Unlike charges ______
repel attract

11. Objects that tend to give up electrons and become positive:
Glass
Nylon
Fur
Hair
Wool

12. Be glad you are not a cat

14. Objects that tend to attract electrons and become negative:
Rubber
Styrofoam

15. Let’s review
#1 Balloon on wall

16. Let’s review
#2 Electroscope

17. Let’s review
#3 Water and balloon

18. Let’s Review
#5 2 balloons held near each other

19. Bill Nye