4th Grade

Readers may list more differences than similarities when comparing floods and blizzards. But, they will discover they have one vital ingredient in common: water. Readers will learn the powerful forces...

If asked to define a forest, readers might say, "It has a lot of trees." But many places have a lot of trees. So, what makes a forest a forest? Readers discover that a forest is unlike any other biome...

Rainforests play an important role in the health of the world. Plants, animals, and people all depend on rainforests for many reasons. A tropical rainforest is filled with wonder and mystery, from the...

Deserts may seem like harsh, uninhabitable places, but 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...

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 Spanish-translated book,...

What helps you stand up strong? What keeps you from flopping like a noodle on the floor? What gives your body its shape and protects your heart and brain? It is your bones, of course! Read all about...

Hurricanes plague the tropics from June through November. Some years bring just a handful of storms. Other years, meteorologists run out of names because there are so many. Readers learn how and where...

Perhaps nothing is more frightening than seeing a forest fire rage out of control. Sometimes, however, fires are set intentionally to benefit the environment. Readers will learn not only what fire is...

What takes the shape of the container it is in and changes shape when the container changes? Liquids! Liquid is a state of matter that has some big differences from solids and gases. Learn all about...

When you want to walk or run, you just think it and do it. But what makes your body move? What makes your legs and arms move up and down? Muscles do the trick! Read this book to learn more about your...

An ocean biome includes the saltwater below the waves, and everything on, above, and near the surface. By covering 70% of the Earth's surface, oceans provide a variety of plant and animal life to...

Water, water everywhere! Although wetlands don't necessarily need to be covered in water all year long, most areas are pretty wet. Whether they are freshwater or tidal, they play a key role in the...