Leveled reader. Science

Gray wolves are a keystone species. Without them, many other animals and plants would be in danger of dying out. Readers of this fascinating book will learn exactly why these fierce hunters are such an important part of ecosystems. Eye-catching photographs bring readers face-to-face with these great predators and hold the attention of even the most reluctant readers. Meanwhile, informative and engaging text helps reinforce essential lessons from the elementary science curriculum. Young wolf enthusiasts will appreciate this captivating volume as much as they appreciate the creatures it is about.

To some people, bees might seem like pests, especially when they're using their stingers or buzzing around a picnic. However, they're incredibly important parts of nature. Without bees, much of the food supply for humans and animals could dwindle. With the help of this informative volume, young readers learn all about the importance of these interesting insects. Age-appropriate text helps reinforce key concepts from the elementary-science curriculum, such as what pollination is and how it works. Readers also learn about the dangers bees face and how they can help.

Scientists have learned from fossils that Triceratops was a large, slow, plant-eating dinosaur with thick skin and three horns on its face.

Scientists have learned from fossils that Diplodocus was a giant, plant-eating dinosaur that lived in herds and defended itself with its whip-like tail.

Scientists have learned from fossils that Stegosaurus was a large, slow, plant-eating dinosaur with bony plates on its back and spikes on its tail that it used for defense from predators.

"Earwax and boogers come from different places, but they're equally gross. This book explores why the body makes these icky, sticky substances and what it means when you find more than usual hanging around your ears and nose. Whether it means someone is getting sick or they just haven't taken a bath in a few days, this book explores good hygiene while also explaining the scientific reasons behind these important body processes"--Provided by the publisher.

Describes how farmers have used cultivators through history to break up soil, prevent weeds, and help crops grow. Includes color photographs, a glossary, and further resources.

Highlights the different parts of the human stomach and the role each part plays in digestion. Includes a glossary, resources for further information, and color photographs.

Highlights the role lungs play in keeping the human body functioning. Includes a glossary, resources for further information, and color photographs.

Briefly examines the science of combustion, discussing friction, oxygen, and fuel. Includes color photographs, a glossary, and further resources.