1 2 3 4 1 _ _ _ _ 2 _ _ _ _ 3 _ _ _ _ 4 _ _ _ _ ACROSS 1) tough protective covering of the woody stems and roots of trees and other woody plants 2) a translucent mineral consisting of hydrated silica of variable color; some varieties are used as gemstones 3) the 6th letter of the greek alphabet 4) domesticated bovine animals as a group regardless of sex or age; ; ; - bible DOWN 1) a man who is a stupid incompetent fool 2) the highest point (of something) 3) a magnitude or frequency relative to a time unit 4) a secret society of white southerners in the united states; was formed in the 19th century to resist the emancipation of slaves; used terrorist tactics to suppress black people ** Scroll down for solution. ** Are you sure you want to peek? bark opal zeta oxen