Ex. 7 p. 49-50

Some teenagers have the energy to play computer games until late at night.

Many teenagers can't find the energy to get out of bed in time for school.

Sleep is extremely important for teenagers.

At night our body produced the *happiness hormone*

Melatonin helps us to fall asleep.

Adults need more sleep than teenagers

Teenagers start to produce melatonin at about 10pm.

The fake that teenagers play computer games late at night stimulates the brain even more and makes it harder for them to fall asleep/

Most teenagers do not get enough sleep.

Weather is the results in bad moods and sometimes depression.

Some American schools have decided to start their classes later in the morning.