Welcome to the first chapter that explores each Kingdom you just learned about in detail! This chapter covers two Domains as well! The first Domain is Archea. It contains the Kingdom Archeabacteria. These ancient prokaryotic organisms are thought to be the first cells on earth! Today they live in harsh environments like hot acidic volcanic lakes! The second Domain is Eubacteria and contains the Kingdom Bacteria. These prokaryotic organisms are usually given a bad reputation by a few that make us sick, but most of them are actually helpful to us!