1. OA3.1 Understanding electricity and magnetism

2. Electricity Warm Up What is electrical energy?
What do you use in your life that need electricity?

3. Electricity
First
A little
REVIEW!

4. 1. Electricity Picture Vocab word Definition A form of energy
caused by the
movement of
electrons
REVIEW!!
Electrons can move from atom to atom (which causes electricity)

5. Atoms
Everything in the world is made up of atoms. Each atom has smaller parts in it.
Neutrons are in the nucleus and have no charge.
Protons are in the nucleus and have a positive (+) charge.
Electrons have a negative (-) charge and are on the outside of the atom.
Most of the time, the number of protons (+) and the number of electrons (-) are equal and the atom is neutral.
REVIEW!!

7. Atoms But sometimes atoms can lose and gain electrons.
When an atom gain electrons, it has a negative charge (-)
It gets more electrons, which are -, there overall charge is negative
When at atom loses electrons, it has a positive charge (+)
It loses electrons, but keeps its protons (+), so overall charge is positive

9. 2. Positive ion Picture Vocab word Definition
An atom that has lost an electron
Has a positive charge (+)

11. 3. Negative ion Picture Vocab word Definition
An atom that has gained an electron
Has a negative charge (-)

13. 4. Charge Picture Vocab word Definition
Created by the loss or gain of electrons
Can be measured
4. Charge

14. 5. Static Electricity Vocab word Picture Definition
The electricity that is caused when objects with opposite charges are attracted to one another
5. Static Electricity

16. Just like in magnets!! But now we are talking about atoms

17. As electrons collect on an object, it becomes negatively charged
As electrons collect on an object, it becomes negatively charged. As electrons leave an object it attains a positive charges. Charges interact with each other:
Often when you remove clothes from the clothes dryer, they seem to stick together. This is because some of the clothes have gained electrons by rubbing against other clothes. The clothes losing electrons become positive. The negative clothes are attracted to the positive clothes.

18. static electricity everyday examples:
When two objects rub against each other electrons transfer and build up on an object causing it to have a different charge from its surroundings.
Like the shoes rubbing against the carpet. Electrons are transferred from the carpet to the shoes.

19. The van de Graaf generator (large silver ball) deposits electrons on the ball. When a person places their hand on the ball and the machine is turned on, electrons are transferred to and collected on the person touching the silver ball.
Why do you think this machine affects the hair of the children in the picture?

20. Bad hair day?
When you take off your wool hat, it rubs against your hair. Electrons move from your hair to the hat. A static charge builds up and now each of the hairs has the same positive charge. Remember, things with the same charge repel each other. So the hairs try to get as far from each other as possible. The farthest they can get is by standing up and away from the others.

21. Why do you get static shock?
As you walk across a carpet, electrons move from the rug to you. Now you have extra electrons and a negative static charge. Touch a door knob and ZAP! The door knob is a conductor. The electrons jump from you to the knob, and you feel the static shock.

23. 6. Discharge Vocab word Picture Definition
When electricity is “thrown off” and the atom becomes neutral again
Either electrons are gained or lost to become “normal” again!
6. Discharge
You would see a “spark” and get a shock!

25. 7. Lightning Vocab word Picture Definition A huge electrical discharge
Can be cloud to ground, cloud to cloud, or within the same cloud
7. Lightning

27. What is thunder?
Lightning is VERY HOT! The heat from the lightning heats up the air VERY, VERY FAST! This makes the air expand very quickly. This causes the boom of thunder!

28. Closure questions Which part of the atom moves in electricity?
Proton b. Neutron c. electron
Why would a balloon stick to a wall?
Electrons have a negative charge, and protons have a ___________ charge.
When an atom gains an electron, that atom is now has a ___________ charge. (positive or negative)

29. Closure questions - Answers
Which part of the atom moves in electricity?
Proton b. Neutron c. electron
Why would a balloon stick to a wall? Negative charges attract each other
Electrons have a negative charge, and protons have a ___________ charge.
When an atom gains an electron, that atom is now has a ___________ charge. (positive or negative)
Positive
Negative