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Across 7. Observed Jupiter’s moons, proved that the Sun is the center of the solar system 10. Uncharged atomic particle 13. Element that is only made in a supernova explosion 14. The force acting on unlike charges 15. The days of the year when day and night are the same length of time 17. Middle of the sun, where fusion takes place 19. Transferring charge by touching one conductor to another 20. Negative charge atomic particle 24. Holding a charged insulator near a conductor, causing the opposite charge to be drawn to the insulator 26. Moon of Uranus, from Shakespeare’s Midsummer Night’s Dream 27. Transferring charge by rubbing one object with another 28. Invented the reflecting telescope, studied the forces of nature 29. Substances in which electrons cannot move easily

Down 1. An object near a star that is large enough that gravity pulls it into a sphere 2. Circuit which bypasses most resistance and large, dangerous current flows 3. Element that is the key to life, but also contributes to global warming 4. Keep the rings of Saturn together (2 Words) 5. Closed loop of conductor through which charged particles travel 6. The force acting on like charges 8. Closest planet to the sun, has no moons but many craters 9. When positive and negative charges in an item are equal 11. Largest moon in the solar system, orbits Jupiter 12. Movement of heat in large clumps, like boiling water 16. Removal of excess charge from an object via a conductor 18. The outermost layer of the Sun’s atmosphere, visible during a total solar eclipse 19. Substances in which electrons can move easily 21. Orbits Saturn, has a nitrogen-rich atmosphere and lakes of methane 22. Time of the month when the visible part of the moon is getting larger 23. Positively charged atomic particle 25. When charged particles are not moving