Why does alcohol affect teenagers more then adults?

Because teenagers minds and body's don't work as good as a adults yet some adults know when to stop and some not...its the same with teens but its just that we have peer preasure...go to alot of party's where there is alcohol and we are influenced by our friend's effects us more because when we drank we cant remember as easy as adults do,we get drank quicker ESP girls...when we drank we cant remember...and pass out quicker then guys do so boys/men could take advantage of them and they would not even know...until they find out that they pregnant...alcohol also effects teens cause it goes into our blood quicker then into a adults blood.

Another important point.

Physicality:

Alcohol is absorbed quite proportional to a person's weight. An adult is generally heavier than a teen. (This gives rise to the term "lightweight" when talking about someone who can't handle their alcohol). Source: Being Irish :)