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Unit 11: Magnetism                                                                     Page 11


                                                Objectives




                                  Lesson 2: Electromagnetism


               This is one of the most important                     ·  Electricity can be caused by a
               scientific discoveries of all time:                       moving magnetic fields.
               moving magnets create electricity.
                                                                     ·  Electricity is a flow of
               Before this, people thought of
                                                                         electrons.
               electricity and magnetism as two
               separate things.  When scientists                     ·  A flow of electrons creates a
               realized that not only were they                          magnetic field.
               linked together, but that one                         ·  Magnetic fields can cause a
               causes the other, then the physics                        flow of electrons.
               really started to fly!
                                                                     ·  Magnetic fields can cause
                                                                         electricity.
               In this lesson, we're going to take
               a closer look at how magnets

               create electricity by building
               electromagnets, galvanometers,
               motors, relays, telegraphs, and
               speakers.  Are you ready?


               You can get started by watching
               this video, and afterward either
               read more about it or start your

               experiments!

               Highlights:

                   ·  Magnetism is caused by
                       moving electrons.

                   ·  Electricity is moving

                       electrons.
                   ·  Electricity causes magnetism.

                   ·  Moving magnetic fields can
                       cause electrons to move.






               © 2010 Supercharged Science                                      www.ScienceLearningSpace.com

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