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1. Why do we need sleep?

2. How long does an average adult sleep?

3. How much sleep do children aged 5-12 need each night?

4. What is REM in sleep?

5. At what stage does dreaming usually occur?

6. Which group needs the most hours of sleep?

7. How many stages are there in one sleep cycle?

8. What slows down when we sleep?

9. Which phase of sleep occurs mostly in the later part of the night?

10. What happens if you don’t get enough sleep?

11. What is a common cause of sleep problems?

12. What is the recommended solution for sleep problems instead of sleeping pills?

13. What is insomnia?

14. What temperature pattern does the body follow during sleep?

15. Why should we avoid sleeping pills?

16. What percentage of adults are satisfied with 5 hours or less of sleep?

17. Which sleep stage involves body repair and growth?

18. Which of the following is NOT a benefit of enough sleep?

19. What is the main purpose of sleep according to the text?

20. What can cause sleeplessness according to the passage?