phon- photo- tele-

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Across
  1. 2. Study of sounds used in speaking
  2. 4. Mail that goes faraway
  3. 6. Plants using light as a source of energy
  4. 7. Using a scope to see things close up
  5. 8. A device used to make sound louder
  6. 9. Sound
  7. 11. An image of a person or object
  8. 13. Communicating from far away
  9. 15. Hearing sound through your ear
Down
  1. 1. Light
  2. 2. Using light to copy paper
  3. 3. A portable telephone
  4. 5. Having a conference faraway
  5. 7. Far
  6. 10. Hearing sound through an earpiece that goes on your head
  7. 11. Chemistry action of light
  8. 12. A TV broadcast
  9. 14. A device for transmitting sound