Transcript Standard EPS Shell Presentation

Integrated Science
Unit 3, Chapter 10
Unit Three: Electricity and Magnetism
Chapter 10 Magnets and Motors
10.1
Permanent Magnets
10.2
Electromagnets
10.3
Electric Motors and Generators
Chapter 10 Learning Goals
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Describe the properties of a permanent magnet.
Describe the forces that magnets exert on other.
Explain why materials like iron and steel are attracted to magnets.
Explain why a compass points north.
Build an electromagnet.
Analyze how electric current affects the strength of the magnetic
field in an electromagnet.
List three ways that the strength of an electromagnet can be
increased.
Compare permanent magnets and electromagnets.
List several applications of electromagnets.
Explain electromagnetic induction.
Describe how electric motors and generators work.
Chapter 10 Vocabulary Terms
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electromagnet
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electromagnetic induction
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generator
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magnet magnetic
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magnetic field intensity
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magnetic force permanent
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magnetic south pole
10.1 Permanent Magnets
Key Question:
What effects do permanent magnets have?
*Read text section 10.1
AFTER Investigation 10.1
10.1 What is a magnet?
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A permanent magnet is a material that keeps its
magnetic properties even when it is NOT close
to other magnets.
10.1 Properties of Magnets
 Magnets have two
opposite poles.
— north
— south
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Magnets exert forces on
each other.
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The forces depend on the
alignment of the poles.
10.2 Electromagnets
Key Question:
Can electric current
create a magnet?
*Read text section 10.2
AFTER Investigation 10.2
10.2 Applications of electromagnets
mag-lev train
toaster
doorbell
10.3 Electric Motors and Generators
Key Question:
How does an electric motor or generator
work?
*Read text section 10.3
AFTER Investigation 10.3
10.3 Using magnets to spin a disk
Use a single magnet go attract and repel
magnets in a rotor by flipping its poles.
10.3 Generating Electricity
A
power plant generator
contains a turbine that turns
magnets inside loops of wire to
generate electricity.