Page 41 - Science Course 3 (Book 2)

4. Explain how electrons move
through a battery.

5. Give an example of a
conductor used in an
electric circuit.

6. Should a conductor have
high or low electric resis-
tance? Explain.

Mo9-L2: Key Concept Check

Direction: On the line before each def nition, write the letter of the term that matches it correctly. Each
term is used only once.

1. the movement of electrically charged particles A. alternating current
B. direct current
2. an electric current that continually f ows in one direction
C. electric circuit
3. an electric current that continually reverses direction D. electric current
E. electric resistance
4. a closed path in which an electric current f ows
F. generator

5. the end of a battery from which electrons f ow G. negative terminal
H. positive terminal
6. the end of a battery into which electrons f ow I. voltage

7. a machine that transforms mechanical energy to electric energy

8. a measure of how dif cult it is for an electric current to f ow in a
material

9. the amount of energy used to move one coulomb of electrons
through a circuit

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