My 10 year old girl snores is that normal?

Tonsils OSA: She may have large tonsils causing some narrowing of the airway and thus snoring at hight. I am more concerned if she is overweight, because that can cause another level of obstruction. As she's breathing at night, check for "pauses" of her breathing, even count with a second hand on your watch. Any pause of more than 20 seconds is definitely not normal.Is there a " snap" as the airway opens?

Depends: Mild snoring that occurs occasionally may not be serious. On the other hand, persistent snoring, headaches, daytime sleepiness, fatigue may indicate a more serious problem like sleep apnea. Keep a log of the snoring and share it with your daughter's doctor. This will help to find the diagnosis.

Relatively common: The tonsils and adenoids generally grow faster than the kid until they reach about eight & stabilize. This triggers snoring in many. Further skeletal growth of the kid continues making the T&A mass relatively smaller such that snoring usually disappears by 16 or so. Kids that snore by age 3-4 or kids that snore to the point they stop breathing for >20 sec need an ENT evaluation.