New Releases by Sally M. Walker

Discusses the physical characteristics, behavior, and habitat of the common and pygmy hippopotamus, and describes efforts to protect these animals from poachers and other threats.

6 PACK, PART OF LIBROS DE ENERGIA PARA MADRUGADORES SET (EARLY BIRD ENERGY)

Introduces glaciers, including how they were formed, how they move, and their importance to the geography and ecology of the world, and discusses ways that we can reduce the deterioration of the glaciers before it is too late.

Introduces earthquakes, discussing how, why, and where they occur; how they are measured; their effects; and how to prepare for them.

Text and pictures describe the Earth''s caves, including their different types, animal life, and how people explore them.

This Early Bird Earth Science title explains what reefs are and how they form. The book discusses coral reefs and fossil reefs, and includes a description of the damage caused to reefs by human activity.

This book introduces young readers to volcanoes—what they are, how they form, and how they affect people.

What a discovery! Deep under the Atlantic Ocean, divers found a shipwreck like no other. It was the H. L. Hunley, a submarine that had sunk during the Civil War! A team of scientists from all over the world came to work on the discovery. How would they raise the Hunley from the ocean floor? How would they open the submarine? And what would they find inside?

Explains what a rock is, how it is formed and different types of rocks.

Describes what minerals are and discusses different types, where they are found, and how they are used.

Describes the physical characteristics, life cycle, behavior, and conservation of rhinos.

Explains what sound is, how it travels, why it moves at different speeds, and why people can''t hear certain sounds.

Explains what magnets and magnetism are, what objects are or are not magnetic, magnetic poles, and types of magnets, and shows related activities.

Why do some things heat up quickly while others don’t? How can heat cause matter to change form—from solid to liquid to gas and back again? Heat cannot be seen, but it can easily be felt. Looking at different objects’ molecular makeup, this book describes the fundamentals of heat and furthers understanding through a series of easy experiments.

In 1938, off the coast of South Africa, a woman found a strange blue fish with four stubby fins, pointed spines, and a funny looking tail—it was a coelacanth! Until that very moment, the world had believed that coelacanths were extinct. Suddenly, scientists around the world were excited—could more of these unusual creatures be found and studied? Discover how scientists worked to solve the mystery of these extraordinary fish.

110 million years ago, a lush river flowed through the heart of what is now a desert in Africa. Lurking in the depths of the river, a humungous monster waited for its prey to come to the river’s edge to drink...and to die. More than 40 feet long, this giant ancestor of the crocodile stalked and killed dinosaurs. In 1997, dinosaur hunter Paul Sereno discovered the enormous reptile fossil named SuperCroc. Learn how modern science uncovers the ancient past in this thrilling account of a prehistoric predator.

On February 17, 1864, the H.L. Hunley made history as the first submarine to sink a ship in battle. Soldiers on the shore waited patiently after seeing the submarine’s return signal. But after several days, the ship had failed to return. What had gone wrong? In 1995, after over 130 years of searching, the H.L. Hunley was finally found buried off the coast of South Carolina. Follow author, Sally M. Walker on a fascinating journey through the workings of the famous submarine, its voyages, and the difficult obstacles that were overcome to recover, excavate and conserve the ship.

An introduction to the physical characteristics, behavior, habitats, and life cycle of sea horses.

High in the sky, Bessie Coleman could soar like a bird. She was free—at least until she landed. As a black woman in the 1920s, she wasn''t allowed to learn how to fly. Forced to travel to France to learn, she became the first African American woman to earn her pilot''s license. Whether she was wing-walking, giving a speech, parachuting, or flying, Coleman inspired people with her bravery and resolve.

Examines the physical features, processes, and many different species of plants and animals that make up the ecosystem of the largest estuary in the United States, the Chesapeake Bay.

Describes the physical characteristics, behavior, life cycle, and endangered status of rays.

Describes the life and accomplishments of baseball star Jackie Robinson, who became the first African American in twentieth-century major-league baseball.

Describes the 1938 discovery of the coelacanth, a fish previously believed to be extinct, and subsequent research about it.

Looks at levers and uses everyday materials to show how they help make our work easier.

Describes the basic physics behind work and simple machinery.

Uses everyday examples to show how wheels and axles function as simple machines.

Uses everyday examples to illustrate how pulleys function as simple machines.

Looks at inclined planes and wedges and using everyday materials shows how they help make work easier.

Looks at screws and uses everyday materials to show how they are simple machines that help make work easier.

In the early 1800s, very few girls were allowed to learn about science. Yet Mary Anning spent her life hunting for fossils on the cliffs of Lyme Regis, England. When she was still a girl, she and her brother found an amazing ichthyosaur skeleton--but that was only the beginning. Author Sally M. Walker uses letters, journal entries, and academic papers to reveal the true story of a woman who followed her own path. Detailed, scientifically accurate artwork by Phyllis V. Saroff offers a vivid portrait of Mary Anning and the fossils she loved.