True book

Introduces ecology and what is studied, ecosystems, the history of ecology and how ecologists work today.

Explains what deserts are like, where they are found, and how they form, looks at how people are able to live in the desert, discusses the types of plants and animals that survive in the desert, and includes information on how people and cities have changed the world's deserts.

Explains what tundras are like, looks at the three types of tundras, discusses the prehistoric animals that lived on the tundra, as well as the species found there in the twenty-first century, and includes information on why tundras are important and what is being done to save them.

Explains what temperate forests are like, discusses the plants and animals that make the temperate forest their home and how they survive cold winters, examines threats to temperate forests, and looks at what is being done to save them.

Explains what tropical rain forests are like, looks at the plants and animals that live in rain forests, and includes information on why tropical rain forests are important and what is being done to save them.

Explains what wetlands are like, looks at the plants that define wetlands, discusses the types of animals that make their homes in wetlands, and includes information on why wetlands are important and what is being done to save them.

Describes the U.S. flag's history and the meanings of its symbols, lists rules about the care and treatment of the flag, and discusses the Pledge of Allegiance.

An introduction to solids, liquids, and gases that explains what they are, how they are formed, and how they are used in every life and provides simple experiments to demonstrate the differences between them and help readers understand the scientific concepts presented.

Introduces the different kinds of family relationships observed among Native Americans and how they varied from one tribe to another.

Provides facts about ancient Mesopotamia, discussing life in Mesopotamia, the importance of its two rivers, the difference between a city-state and an empire, Mesopotamian writing, and the end of the civilizations. Includes maps, a time line, and photographs.