By Richard Nordquist. Definition: Vivid descriptive language that appeals to one or more of the senses (sight, hearing, touch, smell, and taste). See the examples below. Occasionally the term imagery is also used to refer to figurative language, in particular metaphors and similes. See also: 1  Image. 2  Composing Descriptive Paragraphs and Essays.
Teens do need more sleep than adults, but they rarely seem to get it. In addition, teens' natural body clocks tend to lead them to a later sleep phase than adults. Teens should be getting around nine hours of sleep each night, and some might need even a bit more.
Most teenagers weren't getting nearly enough -- an hour and a half less sleep than they needed to be alert. And the drowsiness wasn't only in the early morning. Teens had a kind of sleep trough in the mid-afternoon and then perked up at night, even though they hadn't had a nap. Carskadon is now exploring the effect of light in setting adolescent sleep patterns, for darkness seems to trigger the release of melatonin, often called the sleep hormone.