Capillary Action
What is it?
Capillary action is the movement of water or any other liquid through a thin tube. The speed and distance with which capillary action moves a liquid depends on how much resistance the liquid encounters due to pressure against it inside the tube.
Give me an example!
Did you ever wonder how water gets from deep in the earth to the leaves of trees hundreds of feet above the ground? It's all because of capillary action! Water moves through fine pores in soil and rises through tiny tubes and vessels inside the roots, trunk, and branches of the tree all the way to the leaves. There it nourishes the tree and helps it make its own food in a complicated chemical reaction called photosynthesis.
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