Electricity and Astronomy Crossword puzzle

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Across
  1. 1. Most efficient light bulb, stands for light emitting diode
  2. 6. the moon with an iron core and an ice surface with brownish red marks
  3. 7. was limited to40 watt bulbs, is the least efficient and releases the most heat.
  4. 10. An element in a CFL light bulb that reacts with electrodes
Down
  1. 2. releases gas and water and ice into space and some will slowly come back down
  2. 3. Titan and Enceladus orbit this planet
  3. 4. IO and Europa orbit this planet
  4. 5. The most volcanic rocky moon orbits Jupiter
  5. 8. uses mercury and electrodes to create ultraviolet light that with hitting a phosphor coating creates light
  6. 9. this moon is similar to Earth because it has a form of a water cycle with lakes and rivers