1 Causes of heat exhaustion include activity in a hot environment that can overwhelm the body's ability to cool itself, causing heat-related symptoms, and living in a hot environment without adequate access to water for dehydration. 2  Signs and symptoms of heat exhaustion include. 3  profuse sweating,  weakness,
The average amount of sleep that teenagers get is between 7 and 7 Â¼ hours. However, they need between 9 and 9 Â½ hours (studies show that most teenagers need exactly 9 Â¼ hours of sleep). Teenagers do not get enough sleep for a number of reasons:
How much sleep should an average 13 year old girl get each night? The average 13 year old should get 9 hours of sleep per night. This  is very important. A person that does not get enough sleep will  often be sick more often than people whâ¦o do get enough sleep.