Quiz · The Science Behind Sleep

Question 1What is the main idea of this talk about sleep?

Sleep is a waste of time for busy adults Dreaming is the only useful part of sleep Sleep is an active process essential for health Technology has made sleep unnecessary

Question 2How much sleep do most adults need, according to the speaker?

Between seven and nine hours Between five and six hours Exactly ten hours Between four and five hours

Question 3Why can drinking coffee in the afternoon disturb sleep at night?

It makes the room too bright and noisy It stops the body clock from working forever It forces people to watch bright screens Caffeine stays in the body for many hours