Sleeping Beauty. In class??

I was reading an article about how teens got asked to take a survey about the hours of sleep they get. The average teen sleeps about 9 hours, and the least amount is 8. When scientists reviewed all the tests, 900 students got nine hours, while the other 2,800 reported 8. Scientists also asked students what could harm your health. Most of them said drugs, alcohol, and overly-sleep. If a person doesn't get enough sleep that could cause things like harder to learn, and physical abilities. You can get obese and sleeping can throw off your body's chemical balance.