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.
The circadian rhythm also causes us to feel more alert at certain points of the day, even if we have been awake for hours and our sleep/wake restorative process would otherwise make us feel more sleepy. Changes to this circadian rhythm occur during adolescence, when most teens experience a sleep phase delay. This shift in teens' circadian rhythm causes them to naturally feel alert later at night, making it difficult for them to fall asleep before 11:00 pm.