What is Static Electricity?

Vocabulary _____________________: A basic property of the tiny particle that make up matter. They can be positive or negative. _____________________: The buildup of electric charges in one place _____________________: the area around electric changes, where electric forces can act.

Has your jumper ever made crackling noises when you took it off? Have you ever stuck a balloon to the wall after rubbing it on your head? Has your jumper ever made crackling noises when you took it off? Have you ever got an electric shock off your door knob? Have you ever seen lightening? Ask these questions and expect to get replies but don’t let it go on too long. Be encouraging if someone says something daft try and be positive.

______________________ All these things happen because of ______________________

What is Static Electricity? Static electricity occurs when there is a build up of __________________on the surface of a material. It is called static electricity because the charges don’t move. The electricity we use everyday involves moving charges. You could ask them if they have built electric circuits and what happens if you break the circuit. Point out that things so longer work because the charge can’t flow.

Charge The electron is negatively charged. The proton is positively charged. The neutron has no charge, it is neutral.

opposites attract, likes repel. How do charges behave? What do you know about magnets? 2 north poles will _____________ each other, but a north and a south put together will ____________ one another. opposites attract, likes repel. They should have covered magnets and be familiar with them. Put up the first sentence and then ask what will happen with the blue and red magnets.

Static electricity Static electricity is caused when certain materials are rubbed against each other. Electrons can be rubbed off one material and on to another. The material that has got extra electrons is now negatively charged The material which has lost electrons is positively charged.

Static electricity It is this ________________ of positive and negative charges that causes: Balloons to stick to walls. Your hair to stand on end when brush your hair on a dry day. And the electric shock you sometimes get from the door handle. Briefly show the pith ball electroscope. Both balls should be attracted to the charged rod but when they touch it they will be come charged with the same charge as the rod and then repel each other. This may not work well in humid weather which gives you a chance to explain that the weather affects what happens – one teacher was amazed when I pointed out that static sparks when you take a jumper off are much worse in dry weather,

Lightning

What causes lightning? Lightning is actually just static electricity on a much ___________ scale. The rubbing is caused by air moving around In thunderclouds bottom is usually ___________ and top is ______________

Thunder When the lightning flash happens it heats the air to a ______________ 5 times hotter than the surface of the sun. This causes nearby air to expand and _____________ forming the sound we hear as thunder. They should have covered sound so they should be aware that the sounds we hear are caused by air vibrating.

Interesting facts Lightning bolts can travel at speeds of up to 60,000 miles per second. Every second around 100 bolts of lightning strike the Earth. One lightning bolt has enough electricity to power 200,000 homes. You are more likely to be struck by lightning than be eaten by a shark.

Electricity that moves… _______________: The flow of electrons from one place to another. Measured in ______________ (amps) ____________ energy

How can we control currents? With circuits. _____________: is a path for the flow of electrons. We use wires.

There are 2 types of circuits: ____________________: the components are lined up along one path. If the circuit is broken, all components turn off.

Series Circuit

There are 2 types of circuits: ______________________– there are several branching paths to the components. If the circuit is broken at any one branch, only the components on that branch will turn off.

Conductors vs. Insulators ______________– material through which electric current flows easily. ______________ – materials through which electric current cannot move.

Examples Conductors: Insulators: Metal Water Styrofoam Rubber Plastic Paper

Electrical Electrical Conductors & Insulators

Electrical Conductors Objects that allow electrical charge to _____________ easily

Electrical Conductor Example: The coil from a electric heater gets hot and conducts electricity well

Good Conductors __________________ is a good conductor of electricity

Property of Electrical Conductor: In all good conductors electric current flows through them without resistance Example: Electricity flows through the coil in the power line coils without resistance and easily

Insulators Objects that do not conduct electricity well

Insulator or Conductor??

1. Cotton ball_______________

2. Metal scissors ___________________

3. Metal cookie sheet_____________________

4. Notebook paper____________________

5. Rubber duck____________________

6. Curling Iron______________________

7. Glass Cup______________________

8. Electric Heater (coils)_____________________

9. Plastic Trash Can______________________

10. Metal Wire______________________

11. Plastic Spatula____________________

12. Copper Penny____________________

13. Iron frying pan______________________

14. Drawing chalk___________________

15. Eye on the stove_____________________

Grade 5 Assessed Skills: Magnetism Grade 5 Assessed Skills: Explore and describe uses of magnets Identify the poles of a magnet Identify the description of a magnetic field

Magnets A magnet will ______________ some metals towards itself. Metals that contain iron, nickel, and cobalt are magnetic. In other words, a magnet will pull them.

We use magnets in many ways! Which of the following items in a home use a magnet? Blender washer dryer Radio can opener dishwasher Refrigerator doorbell compass

Uses of magnets Magnets were first put to use in _________________________ because they always point north and south. Magnets are used to _________________, separate, control, convey and __________________________ products and to convert ________________________ energy into mechanical energy or convert mechanical energy into electrical energy.

Magnets around the House: Headphones Refrigerator magnets Computer speakers Telephone receivers Phone ringers Microwave tubes Seal around refrigerator door Plug-in battery eliminators Floppy disk recording and reading head Audio tape recording and playback head Video tape recording and playback head Credit card magnetic strip TV deflection coil Computer monitor Computer hard drive Shower curtain weights / attach to tub Power supply transformers

Magnets inside of motors: CD and DVD spinner and head positioner Audio and VHS tape transport VHS tape loader Microwave stirring fans Kitchen exhaust fans Garbage disposal motor Sump pump Furnace blower and exhaust    Garage door opener Bathroom exhaust fan Electric toothbrush Ceiling fan Pager or cell phone vibrator Clocks (not the wind-up type or LCD type) Computers    

Magnets in your Car: Starter motor A/C clutch Interior fan motor Electric door locks Windshield wiper motor Electric window motor Side-view mirror adjuster motor CD/tape player motor and playback Engine speed sensors Alternator Starter relay Windshield washer pump motor

Magnets have Poles Just like the Earth has a North and South Pole, magnets also have two poles. If you take a bar magnet and hang it from a string, the end that points north is the magnets North Pole, and the end that hangs south is the South Pole. This is because the Earth is actually a HUGE magnet itself! Similar magnetic poles repel, while opposite magnetic poles attract.

Magnets also have a Magnetic Field Every magnet has a magnetic field around it. It can be thought of as a line of force running from the north end of the magnet to the south end of a magnet. Earth’s magnetic field is what causes the needle of a compass to point north and south.

What is an electromagnet? ___________________________ – a magnet made from a current bearing coil of wire wrapped around an iron or steel core.