What are some good online photography contests for teens to enter?

[Kris Fadeley]

I am looking to enter some of my photography into contests but I'm not exactly sure what sites to use and what not. I don't care if there are prizes or not I just want to see how well I do in them, although prizes would be nice.
Also, should I watermark my pictures before entering them into a contest?

[john]

Most camera manufacturers Canon, Nikon, Pentax and Sony have facebook pages that give you the opportunity to enter competitions seasonally or monthly...it's a good place to start...there are plenty of sources for regular competitions...

The 'Top Contributors' on here regularly post links to the best websites when answering questions...I like to let 'newbies' do their own research.

OOPS...I meant to say 'encourage' newbies to do their own research...lol