In the leveled reader Bacteria and Archaea, fundamental science facts of biology are explained through simply written text and colorful, fun illustrations. Young readers discover that bacteria and archaea are tiny organisms too small to be seen with only the eyes. Although they look a lot alike, they are different from each other. Bacteria come in three basic shapes: rods, spheres, and spirals. They live in different places, and some live alone, while others live in colonies. Archaea come in different shapes, such as a ball with hairs on one side, lumpy ping pong balls, rod shapes, and long hair-like shapes. Archaea can live in very hot or very salty places, and some can even eat iron.A pronunciation guide of scientific terms is included. 24 pages filled with engaging, colorful illustrations. Reading Level 1-3, Interest Level 2-5.