How does water get from a trees roots up to its leaves?

Question

How does water get from a trees roots up to its leaves?

Answer 1

By way of xylem

http://en.wikipedia.org/wiki/Xylem

It looks like when water evaporates through the surface of the plant, it creates a type of suction force that pulls water up to replace what is lost. I can't really do it justice without a diagram, but check out the article.

Answer 2

Capillary action.