1. Electricity!

2. Before we talk about electricity…
Let’s talk about ATOMS!
The smallest unit of matter
EVERYTHING is made of atoms
Atoms are made up of 3 particles
Protons
Electrons
Neutrons

3. So, what is Electricity?
Electricity is generated from the motion of tiny charged atomic particles called electrons

4. Electricity

5. Electrons

6. What Is Static Electricity?
A stationary electrical charge that is built up on the surface of a material

7. Static Electricity

8. Where do charges come from?
Matter is made up of atoms. + –
Proton (positive charge) +
neutron (neutral)
electron (negative charge) –
atom
nucleus

9. Where do charges come from?
Rubbing materials does NOT create electric charges. It just transfers electrons from one material to the other.

10. Where do charges come from?
When a balloon rubs a piece of wool...
electrons are pulled from the wool to the balloon. + – –
The balloon has more electrons than usual.
wool
The balloon: – charged,
The wool: +charged

11. Insulators and conductors
Insulators: materials that do NOT allow electrons to flow through them easily.
Insulators can be easily charged by friction as the extra electrons gained CANNOT easily escape.

12. Insulators and conductors
Conductors: materials that allow electrons to flow through them easily.

13. Lightning kills more than 60 people and
injures more than 400 people a year in the US
one mile every five seconds
about 20,000 C
Voltage of up to 1.2x108 volts

16. Thunderstorm Safety Indoors: Stay off the phone Stay away from windows
Use flashlights if the power goes out
Discontinue use of phones and electrical equipment. You may also want to unplug appliances and computers.
Avoid taking a shower or bath. If lightning strikes your house it may send a current of electricity across metal plumbing throughout the house.

17. Thunderstorm Safety Outdoors: Stay low
If possible, find shelter in a building
Keep away from trees, tall objects, metal objects and water
Boaters and swimmer should get to land as a soon as possible
If you begin to feel your hair stand on end, this indicates lightning is about to strike. You should drop to your knees and bend forward placing your hands on your knees and crouch down. Do not lie flat on the ground, this will only make you a larger target.

18. Thunderstorm Safety While Driving: Reduce your speed
Pull off to the shoulder of the road. Be sure you're away from tall objects, such as trees, which could fall due to wind or lightning and do not clog highway underpasses.
Turn on your emergency flashers
Remain in the car until the storm passes
Do not touch any metal objects in the car
Avoid driving on roads covered by water

19. DANGER!!!!!
If not used properly electricity can be dangerous. Follow the safety rules!!!!

20. frayed trip wet fingers broken overload plastic plugs Word Bank
Electrical Safety Rule Number 7 is already filled out for you!

21. Number 1
Do not have wires where people can trip over them…

22. Number 2
Never stick your fingers into a plug socket…

23. Number 3
Never use electrical appliances with frayed wires …

24. Number 4
Never touch a socket with wet hands …

25. Number 5
Never overload a plug socket …

26. Number 6
Never use electrical appliances with broken plugs …

27. Number 7
Always make sure an adult fixes broken electrical appliances …

28. Number 8
Cover electrical outlets with plastic plugs when you are not using them
+ =

29. As long as electricity is used in the correct way it will be safe
As long as electricity is used in the correct way it will be safe. What safety rules can you remember?

30. Worksheet
Look at the pictures on the next slide and make a list of the devices that use electricity and another list of the ones the don’t.
Which ones use electricity to make heat and light energy? And which ones use electricity to make sound energy?

32. Bellringer: 10-3-13 Vocabulary for today: Battery Electric Circuit
Resistance
Safety Tip

33. Electricity
Circuits

34. Power Sources
There are a couple different ways to power an appliance / circuit
Plug into the wall and use electricity
Use a battery for electricity

35. Batteries

36. What are batteries?
Batteries keep electricity for appliances that you can not or do not want to plug in.
Batteries can be put in and taken out of electrical appliances.
Batteries come in all different shapes and sizes.
Batteries can ‘run out’ of electricity.

37. If a battery is not put in correctly then the appliance will not work!
and
The + and – symbols on the battery help you to know which way the battery should be inserted.
If a battery is not put in correctly then the appliance will not work!

38. Circuits
There are many type of circuits.
end

39. Circuits Electric Circuit A complete path that electrons can travel
Circuit diagrams are used to represent different parts
Resistor
Something that uses electrical energy
Light bulb, computer, t.v., …
+ side
- side
Battery or
Power Source
Switch
Light/Power switch
Closed
Circuit is complete
Power is ON
Open
A break in the circuit
Power is OFF
end

40. To be successful... ...look at the circuit diagrams;
decide whether each circuit would work: whether it is complete or not and;
tick what you think is the right answer or write to explain why you think the circuit is complete or not.

41. Will this circuit work?

42. Will this circuit work?

43. Will this circuit work?

44. Will this circuit work?

45. Will this circuit work?

46. Will this circuit work?