Leveled reader. Science

This book tells the process seeds undergo from tiny shells to roots, stalks, and eventually flowers.

The life cycle of a butterfly makes for a captivating journey, and readers will love learning the step-by-step process each creature takes to go from caterpillar to butterfly.

Text and photographs explore the differences between dolphins and porpoises.

Text and color photographs present the differences between seals and sea lions.

Scientists have learned from fossils that velociraptor was a small, fast dinosaur that used its speed and wits to survive, working alone to hunt small animals or steal eggs, and working together to defeat larger prey.

Scientists have learned from fossils that Tyrannosaurus rex was a huge, predatory dinosaur with enormous, sharp teeth.

Diplodocus may have called prehistoric North America home, but there s not much about his world that s similar to ours. Diplodocus, which means double beam, is named after its bones. It knew how to fight off predators with a tail whip that was moved at 800 miles per hour! These fascinating creatures lived interesting lives long ago, and readers will love learning about them with the help of fantastic illustrations that show us just what these animals looked like.

Allosaurus lived a long time ago, but scientists have learned a lot about how this creature lived and what it looked like. Allosaurus means different lizard, and this creature s bones are different than those of other dinosaurs. Unlike some dinosaurs, it also lived all over the world. Readers will love exploring the prehistoric world of dinosaurs and find out just what s so different about Allosaurus in this exciting book with amazing illustrations.

This book teaches what the sun's rays are doing to different parts of Earth at different times as well as the importance of Earth's axis, or tilt.