Why Do We Have to Sleep?

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Across
  1. 3. this means to match up or to get on the same page;it is short for "synchronize"
  2. 4. this is the front part of your brain that controls impulses
  3. 8. this is a song that you sing to babies; a song that might put one to sleep
  4. 9. this is the middle number; "medio" in Spanish
  5. 11. this means "a little bit"
  6. 14. this is physical and mental behaviors that follow a 24 hour cycle
  7. 15. this describes something living in the ocean
Down
  1. 1. this is light that is not the sun
  2. 2. this is the person that invented the light buld (electricity)
  3. 5. this means long term
  4. 6. this would be an adjective that means you are lacking sleep
  5. 7. this is like a picture or a screenshot
  6. 10. this means "agotamiento" in English
  7. 11. this is the button you press on your alarm clock to have 5 more minutes of sleep; also means to sleep
  8. 12. this is another way to say break time or time that you might relax
  9. 13. this is like a convulsion; if someone has a lot of these they might have epilepsy; an electrical disturbance in the brain