'Our world is filled with living things too small to see. Some of these microorganisms are harmful, and some are helpful. This book explores the amazing diversity of microorganisms and looks at how we depend on them.'

'This engaging book explains how we hear sounds with easy-to-understand examples and fun, hands-on experiments.'

'This engaging book explains how sounds are made through a variety of easy-to-understand examples and hands-on, fun experiments.'

'This engaging book explains how we hear sounds with easy-to-understand examples and fun, hands-on experiments.'

'Our world is incredibly diverse, but all living things share certain life processes. This book explores how plants and animals grow, find food, and reproduce. Examples from across the plant and animal kingdoms will help bring this topic to life.'

Offers information on conducting research, including choosing sources, filtering information, and organizing notes.

'This engaging book explains the concept of volume with easy-to-understand examples and fun, hands-on experiments.'

'This engaging book explains the concept of volume with easy-to-understand examples and fun, hands-on experiments.'

'This engaging book explains the concepts of pitch and frequency with easy-to-understand examples and fun, hands-on experiments.'

'This engaging book explains the concepts of pitch and frequency with easy-to-understand examples and fun, hands-on experiments.'

Presents information about different types of energy and how people use some of them to provide power, along with simple activities and experiments that demonstrate the topic.

Explains what cells are, what they do, and their different types, and provides facts about cells in the human body.

Presents information about electricity, looking at its characteristics and how it is generated and used, along with simple activities and experiments that demonstrate the topic.

'We learn about the world by seeing and hearing, but how do light and sound actually work? This book explores the ways that light and sound travel, how we sense them, and how they affect our daily life.'

Presents information about community gardens, looking at what they are, their history, reasons why people create them, how people use them, and how they are organized.

Looks at some of the endangered animals that call North America home, including kangaroo rats, polar bears, condors, sturgeons, and red wolves.

Introduces endangered species from Europe, including Scottish wild cats, Danube salmon, and loggerhead turtles.

'This book introduces readers to a range of endangered animals found in Africa. Readers learn basic facts about each animal, and also why the animal's habitat is threatened. The book also considers what people can do to help, both at an international level and at the level of the readers themselves. Habitat maps, fact boxes, labels, and captions all combine to aid understanding.'

'This book introduces readers to a range of endangered animals found in Asia. Readers learn basic facts about each animal, and also why the animal's habitat is threatened. The book also considers what people can do to help, both at an international level and at the level of the readers themselves. Habitat maps, fact boxes, labels, and captions all combine to aid understanding.'

'This book introduces readers to a range of endangered animals found in Australia. Readers learn basic facts about each animal, and also why the animal's habitat is threatened. The book also considers what people can do to help, both at an international level and at the level of the readers themselves. Habitat maps, fact boxes, labels, and captions all combine to aid understanding.'

'This book introduces readers to a range of endangered animals found in Europe. Readers learn basic facts about each animal, and also why the animal's habitat is threatened. The book also considers what people can do to help, both at an international level and at the level of the readers themselves. Habitat maps, fact boxes, labels, and captions all combine to aid understanding.'