Images of an erupting volcano can be mesmerizing. Readers may be surprised to learn that volcanoes erupt every day. Some erupt constantly, while others lie dormant for years or even centuries. Through engaging text and brilliant photos, readers learn what happens beneath the Earth to cause a volcanic eruption and the different structures beneath the Earth that cause new land to form.
Oceans cover 70 percent of the Earth's surface, providing students with a variety of plant and animal life to learn about. An ocean biome includes the saltwater below the waves and everything on, above, and near the surface. Students will also learn about the beach, tides, cliffs, bays, coastlines, coral reefs, and tide pools.
Deserts may seem like harsh, uninhabitable places, but actually they support a diverse quantity of plant and animal life. And, they aren't always hot! Deserts serve an important role in Earth's existence, too. Readers learn about hot and cold deserts alike, as well as semi-arid and coastal deserts. From the Horned Lizard to the Saguaro cactus rooted in rich soil, the desert biome will amaze readers.
It may be a parent's dream, but imagine life without the internet or world wide web. Would airlines be able to fly? Would our nation's security be at risk? What can be done to safeguard the internet?
Readers will be amazed to discover that every time they climb onto bicycles and ride like the wind, they are defying gravity! This book explains the physics and history behind bicycles, skateboards, and surfboards. Readers learn what happens from the simplest movement of rolling forward to more complex tricks and stunts of jumping and spinning. Readers will never look at bikes, skateboards or surfboards the same way again.
Readers may never expect that they might free fall to Earth, but if they have ever dived into a pool, that's exactly what they've done. This book shows readers how Newton's three laws of motion affect divers, skydivers, and mountain climbers' movements. Readers discover who uses gravity, who works against it, and all other forces that contribute to a successful dive or climb. After reading this book, readers can decide if they will ever be interested in engaging in one of these extreme sports.
Readers won't have to disassemble their favorite toys to discover what makes them work. This book explores electric, magnetic, and motion-powered toys from design to function. It introduces readers to six simple machines and explains how they use force and motion to do work. Not every toy is a technological marvel. Readers learn about time-honored favorites including the rocking horse, Slinky, and rattles.