1. the act of attenuating or the state of being attenuated. 2. (General Physics) the loss of energy suffered by radiation as it passes through matter, esp as a result of absorption or scattering.
A healthy teenage boy may have a higher calorie intake of about 2,200 calories per day; about 61 to 86 g of fat should be consumed. Read more: http://www.livestrong.com/article/399246-a-teen-needs-how-many-grams-of-fat-per-day/#ixzz2QFhZ92Aj. For both teenage boys and girls, 5 to 6 tsp. of fat are recommended daily. Fat can't always be measured by the teaspoon, however, so it is easier to think of fat in actual percentages.
Older Teens. In their later teens, girls continue to grow and gain weight, but their rate of growth slows. For a 16-year-old teenage girl, the CDC states that normal weight is between 43 and 78 kg, or 92 to 171 lbs. This increases slightly to a range of 44 to 79 kg, or 97 to 174 lbs., for a 17-year-old girl.