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Different animals use their body parts in different ways to seek, find, and take in food. Accessible text and detailed photographs help readers understand how animals eat.

Learn the secrets of the solar system with easy to follow experiments that explore and explain space. Find out why the planets move around the sun and why the Earth is the only known planet to support life. History and quiz boxes explain ancient ideas...

From crawling and climbing to swimming and slithering, animals move in many ways. This action-packed book looks at motion in the animal world and the different body parts animals use to get from place to place.

This fascinating book compares and contrasts the different characteristics of animals as they change and grow from babies to adults. Children will also learn that animals such as kittens, born in the same litter, all look like cats, but each one can have...

From homes in the trees, on and under the ground, and even in the water - animals are masters at building structures. This interesting book shows how animals build different kinds of shelters to protect them from weather and predators, and provide a safe...

Different animals use their body parts in different ways to seek, find, and take in food. Accessible text and detailed photographs help readers understand how animals eat.

What materials will keep you dry on a rainy day? What materials will help you clean up a spill? Child-friendly examples and vibrant photographs support readers as they explore how different materials respond to liquids.

Vibrant photographs and accessible text introduce young scientists to the concept of density. Readers are encouraged to explore what makes some objects float and others sink.

This engaging title helps young scientists identify, compare, and contrast natural and human-made materials. Child-centered text and vibrant images combine to clearly explain the properties and uses of these materials.

What materials will keep you dry on a rainy day? What materials will help you clean up a spill? Child-friendly examples and vibrant photographs support readers as they explore how different materials respond to liquids.

How do you change the speed of a moving object? This interesting book explains how forces, such as friction, and the mass of an object, can change the speed of an object in motion. Simple activities help children understand such concepts as acceleration...

How do you change the direction of a moving object? This entertaining book explains how forces can change the direction of an object in motion. Simple explanations and activities help children understand the science behind forces. Teacher's guide...

How do you change the speed of a moving object? This interesting book explains how forces, such as friction, and the mass of an object, can change the speed of an object in motion. Simple activities help children understand such concepts as acceleration...

How do you change the direction of a moving object? This entertaining book explains how forces can change the direction of an object in motion. Simple explanations and activities help children understand the science behind forces. Teacher's guide...

Motion is a change in an object's position. This fascinating title explains in a clear, simple way how objects are moved by a change in energy. Simple activities show young readers how energy is changed by applying a force, either by coming in contact...

What happens when light is blocked? How can we redirect light? Readers will discover the answers to these questions and more in this fact-filled title. Readers will explore the properties of transparent, translucent, opaque, and reflective materials, and...

Sounds help us understand the world around us. This engaging title provides a close-up look at the science behind different sounds. Readers discover how sound waves travel through different matter and learn about concepts such as echoes, volume, and...

This engaging title introduces readers to the science of light waves. Relatable examples, accessible text, and a creative design challenge help readers discover the properties of light waves and their essential role in seeing our world. Teacher's guide...

This book introduces the concept of sound waves in a relatable, child-centered way. Readers will discover that matter must vibrate to make sound and that sound can make matter vibrate. They will also learn how sound waves are used for communication and...

Leo teaches his cat Pallas all about triangles by applying his knowledge of geometry to their Stone Age world. Entertaining illustrations and stories provide a fun introduction to math concepts, explaining that different shapes created by the meeting of...

Leo teaches his cat Pallas all about squares by applying his knowledge of geometry to their Stone Age world. Funny illustrations and stories provide a humorous introduction to math concepts, explaining how lines and angles of equal size form squares that...

Leo teaches his cat Pallas all about spheres by applying his knowledge of geometry to their Stone Age world. Entertaining illustrations and stories provide a fun introduction to math concepts, including radius, circumference, and diameter. Information...

Leo teaches his cat Pallas all about lines by applying his knowledge of geometry to their Stone Age world. Funny illustrations and stories provide a humorous introduction to math concepts. Leo explains the significance of points and how many points...

Leo teaches his cat Pallas all about cubes by applying his knowledge of geometry to their Stone Age world. Funny illustrations and stories provide a humorous introduction to math concepts. Information boxes accompany each story to explore how scientists,...

Leo teaches his cat Pallas all about circles by applying his knowledge of geometry to their Stone Age world. Engaging illustrations and stories provide a fun introduction to math concepts, including tangents, ellipses, and more. Information boxes...

Leo teaches his cat Pallas all about triangles by applying his knowledge of geometry to their Stone Age world. Entertaining illustrations and stories provide a fun introduction to math concepts, explaining that different shapes created by the meeting of...

Leo teaches his cat Pallas all about squares by applying his knowledge of geometry to their Stone Age world. Funny illustrations and stories provide a humorous introduction to math concepts, explaining how lines and angles of equal size form squares that...

Leo teaches his cat Pallas all about spheres by applying his knowledge of geometry to their Stone Age world. Entertaining illustrations and stories provide a fun introduction to math concepts, including radius, circumference, and diameter. Information...

Leo teaches his cat Pallas all about lines by applying his knowledge of geometry to their Stone Age world. Funny illustrations and stories provide a humorous introduction to math concepts. Leo explains the significance of points and how many points...

Leo teaches his cat Pallas all about cubes by applying his knowledge of geometry to their Stone Age world. Funny illustrations and stories provide a humorous introduction to math concepts. Information boxes accompany each story to explore how scientists,...

Leo teaches his cat Pallas all about circles by applying his knowledge of geometry to their Stone Age world. Engaging illustrations and stories provide a fun introduction to math concepts, including tangents, ellipses, and more. Information boxes...

Rivers are bodies of water that flow from high to lower places. They are found on every continent. Maps, diagrams, and exciting photographs help children learn where rivers begin and end, which rivers are the longest and deepest, and why these sources of...

This informative book looks at how different mountains are formed and where they are found on Earth. Maps, diagrams, and exciting photographs help young readers locate the biggest and longest mountain ranges on each continent. Children will also gain an...

Forests grow on every continent except Antarctica. Different kinds of soil and climate create different kinds of forests around the world. Maps, diagrams, and exciting photographs help young children locate different kinds of forests on each continent...

Deserts are very dry places that receive little or no precipitation. Using informative maps and engaging diagrams, this book looks at the major deserts on each continent including cold deserts at the poles, and the ways in which these deserts have formed...

Rivers are bodies of water that flow from high to lower places. They are found on every continent. Maps, diagrams, and exciting photographs help children learn where rivers begin and end, which rivers are the longest and deepest, and why these sources of...

This informative book looks at how different mountains are formed and where they are found on Earth. Maps, diagrams, and exciting photographs help young readers locate the biggest and longest mountain ranges on each continent. Children will also gain an...

Forests grow on every continent except Antarctica. Different kinds of soil and climate create different kinds of forests around the world. Maps, diagrams, and exciting photographs help young children locate different kinds of forests on each continent...

What is bioterrorism and how can the United States prepare and defend itself from this threat? Readers will learn about the history of biological warfare and terrorism--from ancient to medieval to modern times. Stories of a salmonella cult attack, a...

What is bioterrorism and how can the United States prepare and defend itself from this threat? Readers will learn about the history of biological warfare and terrorism--from ancient to medieval to modern times. Stories of a salmonella cult attack, a...