Describes various types of fuel cells and their functions, looks at some of the obstacles that stand in the way of using hydrogen fuel cells as a source of alternative energy, and discusses the future
While offering clear, step-by-step explanations of scientific principles, the titles in this series also discuss the social significance and history of each subject using the most up-to-date research
While offering clear, step-by-step explanations of scientific principles, the titles in this series also discuss the social significance and history of each subject using the most up-to-date research
While offering clear, step-by-step explanations of scientific principles, the titles in this series also discuss the social significance and history of each subject using the most up-to-date research
While offering clear, step-by-step explanations of scientific principles, the titles in this series also discuss the social significance and history of each subject using the most up-to-date research
While offering clear, step-by-step explanations of scientific principles, the titles in this series also discuss the social significance and history of each subject using the most up-to-date research
While offering clear, step-by-step explanations of scientific principles, the titles in this series also discuss the social significance and history of each subject using the most up-to-date research
Explores the different types of natural resources, including renewable and nonrenewable and discusses conservation of resources and alternative sources.
"Light and sound are two of the most important things in the universe. Without them everything would be dark and silent. Plants and animals would die. What scientists have found out about light and so
Discusses the causes and effects of thunderstorms, sandstorms, tornadoes, and blizzards; looks at important people and events in the history of meteorology; and includes a science activity demonstrati
With an inviting contemporary design, each book in this career-planning series details the required skills and education for an array of professions while also providing a glimpse at day-to-day activi
Describes the landforms that make up the Earth's surface, discussing how volcanoes, weathering, erosion, and glaciers work to constantly change the physical geography of the planet.
With an inviting contemporary design, each book in this career-planning series details the required skills and education for an array of professions while also providing a glimpse at day-to-day activi
This book introduces you to the microscopic world of bacteria, from blue green algae to spirochetes. It examines how bacteria move, feed, and reproduce. It also looks at the benefits and drawbacks of
"From Earth's rising temperature to the declining supply of fossil fuels, our planet is changing, and not for the better. What can you do to help? Recycle. Buy local. Plant a tree. Turn off the lights
"From hurricanes to droughts to melting glacial ice, the signs are all around us Our planet has a fever, and the environment is suffering. What can you do to help? Even small changes can reduce the ga
"Earth's climate is warming up, and its plants and animals are at risk. How will they survive the change in climate? What can you do to help? Send a petition. Eat organic. Buy in bulk. Turn off the li
Discusses online safety, providing information on the dangers posed by identity theft, cyberbullying, and internet predators, and how to stay safe, and includes stories from teenagers about their expe
Whether readers are just learning the game or interested in learning more, this series will appeal to all young sports enthusiasts through descriptions of the rules, equipment, and strategies of the s
Presents an introduction to the solar system, discussing the Sun, planets, the Earth, dwarf planets, asteroids, meteorites, comets, and constellations.
With an inviting contemporary design, each book in this career-planning series details the required skills and education for an array of professions while also providing a glimpse at day-to-day activi
With an inviting contemporary design, each book in this career-planning series details the required skills and education for an array of professions while also providing a glimpse at day-to-day activi
Discusses the changes that come along with adolescence, including information on puberty, dating, and sex, and includes stories from teenagers about their experiences.
Presents an introduction to the way animals are classified, discussing Linnaeus's taxonomy, the different phyla of the animal kingdom, and the characteristics that the animals in each phylum have in c
"When you look up at the night sky, do you ever wonder why some stars seem to move? These moving lights are not stars. They are artificial satellites, machines put into space to help us communicate or
Discusses the science behind structural engineering failures, particularly building collapses, including how they may occur and how advances in structural engineering are helping to prevent further co
Presents an introduction to the Earth, discussing the atmosphere, hydrosphere, and geosphere; describing the ways they are being damaged by humans; and suggesting things people can do every day to hel
With an inviting contemporary design, each book in this career-planning series details the required skills and education for an array of professions while also providing a glimpse at day-to-day activi
Describes various types of robots and their functions, discusses technological advancements in the field of robotics, and considers the ethical issues surrounding autonomous robots.
