1. Magnetism Session 28
Scientists will describe uses of magnets in their daily life and explore how a magnet works by identifying the poles of the magnet. Scientists will then explain how magnetism is related to Earth.
Which of the Earth’s layers is the most dense?
Explain how scientists have determined that this layer is the most dense.

2. Teacher Demonstration
After observing the demonstration
Complete 5 minute quick write about what happened.

3. What does a magnet do? A magnet will pull some metals towards itself.
Metals that contain iron, nickel, and cobalt are magnetic. In other words, a magnet will pull them.

4. 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

5. How do we use magnets? ?
Magnets were first put to use in navigation because they always point north and south.
Magnets are used to hold, separate, control, convey and elevate products and to convert electrical energy into mechanical energy or convert mechanical energy into electrical energy.
Record one example of how you use magnets in your daily life.

6. Examples of Magnets in our lives
Washing machines to keep the door shut CD and DVD spinner and head positioned Microwave stirring fans Kitchen exhaust fans Garbage disposal motor 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 Interior fan motor Electric door locks Windshield wiper motor

7. 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.

8. 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.

10. Dynamo Effect Created by Inner Core (metals: majority iron, nickel)
Rotation of earth
Earth’s magnetic field’s origin is the core.
How does a magnet work?
Explain why a compass’s magnetized needle point north?

11. Complete this activity to explore magnetic fields
Magnet/Compass Lab
Complete this activity to explore magnetic fields