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What is a Bear?

Bobbie Kalman, John Crossingham (authors)

Publisher: Crabtree Publishing Company ISBN: 9780778790006

Powerful yet shy, bears are solitary creatures remarkable for their size, strength, and adaptable intelligence. What is a Bear? gives children clear insight into the bear family tree, a bears body, how mothers care for their cubs, their diets, and hunting techniques.

What is Migration?

John Crossingham, Bobbie Kalman (authors)

Publisher: Crabtree Publishing Company ISBN: 9780778789963

From whales and deer to butterflies and eels, animals migrate to breed, feed, stay warm, find water, and even sleep! Animals follow paths passed on for generations ensuring the survival of their species. Discover the amazing treks of the Arctic tern, the salmon, and the Canada goose.

What is a Horse?

Bobbie Kalman, Heather Levigne (authors)

Publisher: Crabtree Publishing Company ISBN: 9780778789994

Children love horses! Today, there are more than 300 different breeds around the world! What is a Horse? explores the family tree of horses and their equine relatives including their physiology, feeding habits, the birth of a foal, "horse sense", and horses in the wild.

What are Camouflage and Mimicry?

Bobbie Kalman, John Crossingham (authors)

Publisher: Crabtree Publishing Company ISBN: 9780778789987

In the animal world, the easiest way to avoid being eaten is to avoid being seen. What are Camouflage and Mimicry? examines animals that use unique colorization and patterns to avoid predatorsor to sneak up on prey! Some are virtually impossible to see.

What Is the Theory of Plate Tectonics?

Craig Saunders (author)

Publisher: Crabtree Publishing Company ISBN: 9781427195319

In 1912, German meteorologist Alfred Wegener proposed that the continents were once a single land mass but had slowly moved apart over millions of years. This fascinating book examines the scientific process behind Wegener's theory and how it challenged prevailing views of the time. Learn how years after Wegener's death his theory was embraced by scientists and is now the basis for modern earth science.

The Amazing Circulatory System

John Burstein (author)

Publisher: Crabtree Publishing Company ISBN: 9780778789017

Join our Body Buddy Ticker as he explores the workings of the heart and circulatory system. Children will learn how the amazing heart muscle works, and will discover how blood vessels transport life-giving oxygen to the cells and carry away carbon dioxide. Colorful layouts make learning about this complex topic easy and fun.

What Is Atomic Theory?

Adam Mclean (author)

Publisher: Crabtree Publishing Company ISBN: 9781427195265

Learn how John Dalton developed his influential theory that explains the shape, structure, and behavior of atoms. This title also explores how Dalton's major breakthrough made later discoveries, such as atomic fission, possible.

What Is Cell Theory?

Marina Cohen (author)

Publisher: Crabtree Publishing Company ISBN: 9781427195289

This fascinating new title examines the sequence of events that led to the formation of cell theory. In 1665, scientist Robert Hooke published Micrographia, the first significant work focused on miscroscopial observation. His groundbreaking work inspired scientists and led to the creation of this fundamental biological principle that shaped modern biology.

What Are Newton's Laws of Motion?

Denyse O'Leary (author)

Publisher: Crabtree Publishing Company ISBN: 9781427195296

This exciting book examines how Sir Isaac Newton developed three basic laws that govern the way in which objects move. Readers will learn how Newton expanded on the work of other great scientists, including Galileo and Copernicus, to make his important discovery. The book also explains how Newtons laws have influenced modern science and technology in areas such as sports and transportation.

What Is the Theory of Evolution?

Robert Walker (author)

Publisher: Crabtree Publishing Company ISBN: 9781427195272

This engaging title examines how Darwin developed his controversial theory of evolution, including his research methods and the data gathered during his extensive voyages. The book also explores the controversies that developed around the publication of Darwins theory of natural selection and how the debate continues today.

What Is Germ Theory?

Natalie Hyde (author)

Publisher: Crabtree Publishing Company ISBN: 9781427195302

French chemist Louis Pasteur made several significant contributions to the world of science. This intriguing book examines how Pasteur uncovered the basis of the modern germ theory. Readers will learn how Pasteur's theory helped him develop vaccines for anthrax, rabies, and other diseases and how his work continues to influence modern medicine.

The St. Lawrence: River Route to the Great Lakes

Lynn Peppas (author)

Publisher: Crabtree Publishing Company ISBN: 9780778791690

This informative book follows the St. Lawrence River, once a main route of the fur and timber trades. This important commercial waterway forms part of the boundary between Canada and the United States and connects the Great Lakes with the Atlantic Ocean. Today, a system of canals, dams, and locks lets seagoing ships travel all the way to Lake Superior.

The Nile: River in the Sand

Molly Aloian (author)

Publisher: Crabtree Publishing Company ISBN: 9780778791676

The Nile is the worlds longest river and the birthplace of one of the greatest civilizations of the ancient world. This book takes readers along the River in the Sand. Ancient Egyptians depended on the Niles annual floods to deposit fertile soil for farming. Today, more than 70 million people still grow crops in the rivers basin and fish in its waters.

The Amazon: River in a Rain Forest

Molly Aloian (author)

Publisher: Crabtree Publishing Company ISBN: 9780778791645

Second in length only to the Nile, the Amazon River carries a greater volume of water than any other river in the world. This attractive book features the fascinating facts about this far-reaching river and the animals, plant life, and indigenous cultures that live in the surrounding rain forest.

The Mississippi: America's Mighty River

Robin Johnson (author)

Publisher: Crabtree Publishing Company ISBN: 9780778791669

This wonderful book takes readers along the mighty Mississippi. Often celebrated in music and literature, its exploration by explorers spurred the growth of a new nation. Today, the Mississippi not only provides transportation for agricultural and industrial goods but also supplies water for millions of people.

Plants in Different Habitats

Rebecca Sjonger, Bobbie Kalman (authors)

Publisher: Crabtree Publishing Company ISBN: 9781427166524

Plants are living things that grow and change. Over time, plants have made remarkable adaptations to suit the habitats in which they live. Simple text and beautiful images highlight how plants have adapted to life in the Arctic, in aquatic environments, and in other habitats such as those in deserts and grasslands.

Changing Seasons

Bobbie Kalman, Kelley MacAulay (authors)

Publisher: Crabtree Publishing Company ISBN: 9781427166487

Changing Seasons clearly explains the fascinating changes that take place in nature every year. This vibrant book takes an in-depth look at why there are four seasons, the patterns that appear in each season, and how these changes affect both plants and animals.

Earth's Mountains

Bobbie Kalman (author)

Publisher: Crabtree Publishing Company ISBN: 9780778790273

Young readers will be fascinated to learn about how mountains are created and change. Through breathtaking photographs, they will wonder at Earths majestic mountains and meet some of the people and animals that live in the often-harsh environment so high above the ground.

Earth's Coasts

Bobbie Kalman (author)

Publisher: Crabtree Publishing Company ISBN: 9780778790266

In this beautifully photographed book, Bobbie Kalman takes children on a tour of different coasts, where they can ride some breathtaking ocean waves or meet underwater animals that live in nearby coral reefs. Children will also be introduced to some amazing coastal cities and learn about famous coastal rock formations.

Earth's Rivers

Bobbie Kalman (author)

Publisher: Crabtree Publishing Company ISBN: 9780778790280

Why do people need rivers? What causes rivers to flood? These are just a few of the questions answered by this fascinating introduction to rivers.

What Are Minerals?

Natalie Hyde (author)

Publisher: Crabtree Publishing Company ISBN: 9781427197429

Minerals are chemicals that are the building blocks of rocks. Metals, crystals, and gemstones are all minerals found in rocks. This interesting book describes how to identify minerals, where they can be found, the rock cycle process, the uses of minerals, and how they are mined.

Science, Medicine, and Math in the Early Islamic World

Trudee Romanek (author)

Publisher: Crabtree Publishing Company ISBN: 9781427195630

The scientific contributions of the early Islamic empires to science, medicine, and mathematics is considerable. This revealing book explores: their public hospitals, libraries, and universities; their achievements in mathematics and astronomy, and the pursuit of alchemy; Arabic numbers; optics; music and musical instruments; poetry; and education.

What Is the Rock Cycle?

Natalie Hyde (author)

Publisher: Crabtree Publishing Company ISBN: 9781427195258

What is the Rock Cycle describes the natural transformation of one type of rock into others. Beginning with igneous rocks made in volcanic eruptions, rock is weathered and eroded gradually to form a sediment. This sediment is then deposited and pressed into layers making sedimentary rocks. These in turn are transformed by heat and pressure into metamorphic rocks. Heat makes these melt into magma which, together with molten rock from the core of the Earth, make new igneous rocks.

What Are Sedimentary Rocks?

Natalie Hyde (author)

Publisher: Crabtree Publishing Company ISBN: 9781427195241

It all starts with erosion for sedimentary rock. Worn down bits of rock become pressed together under pressure into strata, or layers. The formation of rock such as sandstone, shale, limestone, and dolomite is explained in this fact-filled book. Readers will also learn that this type of rock is useful in determining the Earths geological history because its layers often hold fossils and other geological clues.

What Are Crystals?

Molly Aloian (author)

Publisher: Crabtree Publishing Company ISBN: 9781427197405

Crystals are made up of minerals hardened into distinct shapes with regular repeating patterns. This informative book takes a look at the underground process that creates crystals, from sparkling quartz to ordinary salt, as well as where they are found and how they are mined.