Am I Smarter than a 5th Grader?

Now that 2 months has gone by since I went to Florida I've finally gotten through all of the nearly 200 photos I took and sorted them out and cropped them and all of that business. I took this picture of alligators on that safari ride at the Animal Kingdom but the thing is, is that now I'm not even sure these are alligators. They might be crocodiles. I'm 34 and I'm not certain of the difference just by looking at one. I bet a 5th grader could tell me. I think it has something to do with the snout but otherwise I think they're pretty much the same thing. I'm 95% sure these are alligators.
http://www.fox.com/areyousmarter/