Oak trees are struck by lightning more than any other tree for a few reasons. One is that they are some of the tallest trees in the area. The higher objects are, the more likely they will be struck by lightning. Another reason is that oak trees are very conductive. Conductive means that electricity (which is what lightning is) travels through an object easily. Water is great at conducting electricity and oak trees are filled with water-filled cells running up and down their trunks!