Read this sentence from paragraph 5 of the passage. "And since melatonin stops being released around 8:00 a. m., that's about the time
you naturally stop feeling sleepy—no matter what time you go to bed.”
Which word in the sentence is an adverb?
time
Reading Passage
circadian rhythm we're interested in is your sleep-wake cycle.
S Part of the sleep-wake cycle is the release of a brain chemical called meiatonin
into your bloodstream. Melatonin makes you feel sleepy. During your teen years,
melatonin is released later in each 24-hour cycle than it was when you were a
child. As a result, if you're a typical teenager, you don't start getting sleepy until
11:00p. m. or even later. And since melatonin stops being released around 8:00
am that's about the time you naturally stop feeling sleepy-no matter what time
you go to bed
6 Teens may brag about getting by on only five hours of sleep. Yet scientists have
known for a long time that teens need around nine hours of sleep each night—that
is, if they want to function at their best.
7 So do the math Since your body is saying, "I can't go to sleep before 11 pm."
you would have to get up no earlier than 7:30 or 8:30 to get sleep Most
American high schools have already started by 7:30. No wonder Carrie Guidry and
millions of other teens are dozing through at least the first class period of the day
What the Roeonrrh Save
since
naturally
around