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Across 4. electrons in outer shell that create electricity 5. unit of measure for current 6. tiny device used to control current and amplify voltage or current 9. a flash light battery cell is ___ 10. materials that resist the flow of voltage 12. positive charges of an atom 13. process of losing or gaining electrons 17. the study of the control of electron flow in a circuit 20. materials that do not have a strong hold on valence electrons 21. no charge 23. device that changes mechanical energy into electrical energy 24. the flow of electrons in a wire or other conductor 25. all matter is made up of 27. device made of two different conducting materials in a conducting solution

Down 1. the movement of electrons from one atom to another 2. a car battery cell is ____ 3. tiny piece of semiconductor material containing mini components 4. unit of measure for voltage 7. number of parts to an atom 8. the opposition to the flow of electrons 11. electricity that can be seen 14. pathway through electrons travel or flow 15. the electric pressure that causes current to flow 16. negative charges of an atom 18. device that converts chemical energy into electrical energy 19. electronic component that allow electrons to flow in only one direction 21. center core of an atom 22. each level around the nucleus 26. unit of measure for resistance