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Across 2. A not very good conductor, but not an insulator. 5. The charge of an electron. 6. A good insulator, used to prevent the conduction of electricity. 7. A flow of electrons. 10. The opposite of a conductor. 11. A good conductor, used to conduct electricity.

Down 1. An electron is a negatively charged one of these. 3. Used to power lights, tools and many other things. 4. The opposite of an insulator. 8. Friction causes this. 9. A good insulator, used to prevent the conduction of electricity.