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.
Increased Growth Needs for Teens. Teens grow at astounding rates! Teenage girls grow approximately 23 to 28 cm during their teen years, and teen boys add approximately 26 to 28 cm to their height. Growth during the teen years accounts for about 20% of total height. Not only do teens grow up, but they grow out as well. Weight gain during the teens accounts for about 50% of a personâs ideal adult body weight. Lean body mass (muscle mass, bones, organs â everything except body fat) increases in both teen boys and girls.