McGraw-Hill Science 2005 Return to Unit List
Grade 4
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In order to flow, electricity must follow a(n) path. The complete path that electricity can move through is called a(n) . The electricity that flows through a circuit is called electricity. Current electricity is different from electricity, which does not flow. Current electricity will flow only through a(n) closed circuit. If there are breaks in a path, it is called a(n) open circuit, and no electricity will flow. A device called a(n) controls the flow of current in a circuit. The strength of an electrical current is measured in .
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