Well, now we know...how a tree sucks up all that water...and what happens to it.
While focusing on the physical process of water movement, this intelligent young man mentioned that this process is what biologists call "transpiration". Wikipedia explains transpiration in excellent and concise detail and complements the video nicely.
My favorite part of the video comes at the 6:00 mark; we get to watch the moment when he "gets it."
This video is a great demonstration on how the process of education is being changed by technology and social networks. Give students a challenge, a computer, internet access, a network of smart friends (like Jeff Wartluft, who shared this video) and teachers to chat with. The education will take care of itself, to the degree of motivation and capability of the challengers and the challenged.
Aren't we all students now, really?