1. Bell Work SPI 0807:12.2 Electromagnetism Jan 13, 2015 Instructions
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Bell Work
Jan 13, 2015
Instructions
A) The electromagnet shown below consists of 3 basic components.
(1) A solenoid, (2) An iron core, & (3) A battery
B) Draw this diagram on your own paper, and label these 3 items.

2. Tennessee SPI Objective: Check for Understanding Essential Question(s)
Magnetic Fields
Notes
Science
Tennessee SPI Objective:
Distinguish among the Earth’s magnetic field and the fields that surround a (permanent) magnet and an electromagnet.
Check for Understanding
Create a chart to distinguish among the earth’s
magnetic field and the fields that surround a
(permanent) magnet and an electromagnet.
Essential Question(s)
What is a magnetic field? What are the similarities
and differences between the Earth’s magnetic field and
the fields from permanent magnets & electromagnets?

3. See Holt Online: Ch. 16: Sect 1 Visual Concept,
SPI 0807:12.3
Magnetic Fields
Notes
Science
Magnetic Fields
An invisible magnetic field exists around all magnets.
See Holt Online: Ch. 16: Sect 1 Visual Concept,
Title: Magnetic Field

4. Notes Science SPI 0807:12.3 Magnetic Fields Magnetic Fields
magnetic field lines originate at the poles
You can see them by using fine iron filings.

5. See Holt Online Ch. 16: Sect 1 Visual Concept
SPI 0807:12.3
Magnetic Fields
Notes
Science
Magnetic Poles
are areas on a magnet that have opposite magnetic qualities.
North and South
One area is called the north pole.
The opposite area is called the south pole.
See Holt Online Ch. 16: Sect 1 Visual Concept
Title: Magnetic Poles
South Pole
North Pole

6. Notes Science SPI 0807:12.3 Magnetic Fields North and South Poles
All magnets have these poles regardless of the shape of the magnet
Bar magnet
Horseshoe Magnet
Donut magnet

7. Notes Science SPI 0807:12.3 Magnetic Fields Magnetic Forces
magnets exert a magnetic force on other magnets due to spinning electric charges in the magnets.
“Opposites” attract (North & South pull towards each other)
“Like” repels (North & North or South & South push away)

8. Notes Science SPI 0807:12.3 Magnetic Fields Earth is a Giant Magnet
Our planet has a powerful magnetic field
See Holt Online: Ch. 16: Sect 1 Visual Concept
Title: "Earth's Magnetic Field"

9. Notes Science SPI 0807:12.3 Magnetic Fields
Now for the confusing part:
Earth's north magnetic pole is at the southern end (Antarctica)
Earth's south magnetic pole is at the northern end (Artic Circle)
Geographic North
Geographic South
Geographic North
Magnetic North
Magnetic South
Geographic South

10. Notes Science SPI 0807:12.3 Magnetic Fields Magnetic South Pole
Magnetic North Pole

11. Notes Science SPI 0807:12.3 Magnetic Fields
Earth's magnetic field is called the magnetosphere. It protects us from harmful solar radiation
Science

12. Notes Science SPI 0807:12.3 Magnetic Fields
We can see the solar wind hitting Earth's magnetosphere.
In the northern hemisphere this is called the Aurora Borealis.
In the southern hemisphere this is called the Aurora Australis
SPI 0807:12.3
Magnetic Fields
Notes
Science
View this video: Title: "Dance of the Spirits-Northern Lights
Link: Northern Lights Video Clip