Much of the battle against disease is fought by these scientists and their amazing equipment. This volume recounts the history as well as the current state of the art.

Many kinds of workers are needed to care for all of the different animals living at a zoo. Readers will learn about the jobs done by people working behind the scenes to make sure that zoo animals stay healthy and visitors enjoy their days at the zoo.

Bugs and insects have always fascinated children. This book in the Creepy Crawly Critters series introduces young readers to the praying mantis. Readers can discover physical characteristics, habitat, diet, and more.

Young children are naturally curious about the world around them. Tell Me Why It Snows offers answers to their most compelling questions about winter weather. Age-appropriate explanations and appealing photos encourage readers to continue their quest for knowledge. Additional text features and search tools, including a glossary and an index, help students locate information and learn new words.

In this book, students see the scientific method at work in a real-world situation. Readers practice close reading as they look for clues that will lead to a deeper understanding of erosion, sinkholes, and Earth's structure. The scientific method pushes students to apply critical thinking as they learn new methods of exploration and build on concepts they may already know. Additional tools, including a glossary and index, help students learn new vocabulary...

Long known as a potential power source, geothermal energy - heated water from within the Earth - is now being tapped. This book outlines those efforts and looks to the future.

What happens to the environment when a tornadoe occurs? What are some of the causes of tornadoes? What can people do to protect themselves from tornadoes? How can you use your math skills to learn more about tornadoes? Read this book to find the answers to these questions and learn more about tornadoes.

All living things need air to survive. Air also protects Earth. Discover why air is an important part of nature!

This book relays the factual details of Hurricane Katrina through three different perspectives. The narrative provides multiple accounts of the event, and readers learn details through the point of view of a storm survivor, Coast Guard officer, and California student. The text offers opportunities to compare and contrast various perspectives while gathering and analyzing information about a modern event. Modern events never look the same to everyone....

The ability to use the scientific method is key to carrying out experiments, taking measurements, or performing technical tasks. In this book, readers in real-world situations are tasked with following clues and using the scientific method to find out what happens as animals approach extinction. Informational text presents evidence and facts in the form of clues and side-bar details to help children develop critical thinking skills. A summary of the...