Like a finely tuned machine, the human body is an awe-inspiring marvel worthy of further investigation. In addition to highlighted content-area vocabulary and photographs, some books feature a lab activity as well.

Like a finely tuned machine, the human body is an awe-inspiring marvel worthy of further investigation. In addition to highlighted content-area vocabulary and photographs, some books feature a lab activity as well.

What does this book, a table, and your big toe have in common? They are all solids! A solid keeps its shape and always has the same volume. Read this book to learn about solids and how they are different from liquids and gases.

Asteroids and comets shoot straight through space. They just look like bright lights with tails, but there is much more to these fascinating objects! Learn all about asteroids and comets in this book.

What does the sun do for us other than give us light during the day? It gives us warmth, energy, and so much more! Learn all about the sun in this book.

Readers will be amazed to discover that every time they climb onto bicycles and ride like the wind, they are defying gravity! This Spanish-translated 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.

What continues to expand to take up all the space it can? Gases! Gas is a state of matter, like a liquid or a solid. But it has properties that are quite different. In this book, read all about the differences and what makes a gas a gas.

Learn all about planet Earth in this engaging, colorful title! Earth is our home. It is a big, beautiful place that orbits the sun. What else is there to know about Earth? Read this book to find out!

Bright stars twinkle in the night sky. Have you looked up into the sky on a clear night and seen these tiny points of light? Did you know that there are many kinds of stars in space? Find out all about them in this book.

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.