Across
- 2. type of sleep
- 3. your bodies internal clock
- 5. something everyone needs to survive
- 6. a popular theorist
- 9. side effect of sleep deprivation
- 10. ideal sleep environment
Down
- 1. something important for a sleep schedule
- 4. used to be woken up
- 7. bad sleep environment
- 8. what sleep does to your brain