Deep Sleep

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Across
  1. 4. The routine or pattern of sleep and wake times.
  2. 5. A series of thoughts, images, and sensations occurring in a person's mind during sleep.
  3. 6. A frightening or unpleasant dream.
  4. 7. A person who wakes up early in the morning.
  5. 8. A short sleep, usually during the day.
  6. 9. A person who tends to stay up late at night.
Down
  1. 1. Difficulty in falling or staying asleep.
  2. 2. The condition of not having enough sleep.
  3. 3. A stage of sleep characterized by rapid eye movement and dreaming.