Page 35 - Science Course 3 (Book 2)
P. 35

Electric Current and Electric Circuits             Mo9-L2a:     What is Electric Current and
                                                                                an Electric Circuit?
               Lesson 2

                                                                  Let’s Begin





                  In this topic, you will learn the following     Electric Current—Moving Electrons
                  lessons:
                                                                  Electrons have the property of negative electric
                  Mo.9–L2a:   What is Electric Current and an     charge.
                              Electric Circuit?
                  Mo.9–L2b:   What are the Two Types of Electric   Many of the electrons of an electric conductor are
                              Circults?                           free to move from atom to atom.

                                                                  When free electrons move in the same direction, an
                                What is Electric Current and an   electric current is produced.
                 Mo9–L2a
                                       Electric Circuit?
                                                                  An electric current is the movement of electrically
               KEY CONCEPTS:                                      charged particles.
               1. How are electric current and electric charge related?
               2. What are the parts of a simple electric circuit?





                            Vocabulary A-Z
                            Let us learn some vocabulary




                electric current
                the movement of electrically charged particles.


                                                                  As electrons move from atom to atom, their kinetic
                                                                  energy transforms to other useful energy forms,
                                                                  such as light and thermal energy.











                electric circuit                                   Free Electron
                a closed, or complete, path in which an electric
                current f ows.







                                                                  Moving electrons, or an electric current, is one of the
                                                                  most common forms of energy.











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